IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0634400
(2000-08-09)
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발명자
/ 주소 |
- Lomp, Gary
- Kowalski, John
- Ozluturk, Fatih
- Silverberg, Avi
- Regis, Robert
- Luddy, Michael
- Marra, Alexander
- Jacques, Alexander
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출원인 / 주소 |
- InterDigital Technology Corporation
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
24 인용 특허 :
105 |
초록
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A spread spectrum system having an assignor, a spread-spectrum processor and a transmitter. The assignor assigns each arriving information signal to a message-code signal. Each message-code signal is different then other message-code signals. The spread-spectrum processor generates a pilot code sign
A spread spectrum system having an assignor, a spread-spectrum processor and a transmitter. The assignor assigns each arriving information signal to a message-code signal. Each message-code signal is different then other message-code signals. The spread-spectrum processor generates a pilot code signal and processes the information signals with the message-code signals to generate spread-spectrum process-message signals synchronized to the pilot-code signal. A transmitter combines the spread-spectrum process-message signals and the pilot-code signal to generate a CDM signal. The transmitter modulates the CDM signal with a carrier signal for transmission over the communications channel.
대표청구항
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1. A spread-spectrum system comprising:assignment means for assigning each information signal, of a plurality of information signals arriving at an input to said spread-spectrum system, to a message-code signal, of a plurality of message-code signals, with each message-code signal in the plurality o
1. A spread-spectrum system comprising:assignment means for assigning each information signal, of a plurality of information signals arriving at an input to said spread-spectrum system, to a message-code signal, of a plurality of message-code signals, with each message-code signal in the plurality of message-code signals different from other message-code signals in the plurality of message-code signals;spread-spectrum processing means for generating a pilot-code signal, and for spread-spectrum processing the plurality of information signals with the plurality of message-code signals to generate a plurality of spread-spectrum processed-message signals, respectively, with the plurality of message-code signals synchronized to the pilot-code signal; andtransmitter means, coupled to said spread-spectrum processing means, for combining the plurality of spread-spectrum processed-message signals and the pilot-code signal to generate a code-division-multiplexed (CDM) signal, for modulating the CDM signal with a carrier signal to generate a modulated-carrier signal, and for transmitting the modulated-carrier signal over a communications channel using radio waves; andthe spread-spectrum system with several information signals of the plurality of information signals having several different channel rates, and each of the plurality of message-code signals supporting a pre-determined information-channel rate, the spread-spectrum system further comprising:call-processing means for providing a call-type signal corresponding to the information signal rate for the several information signals having several different channel rates; andinformation-channel-mode modification means, coupled to said assignment means and to said spread-spectrum processing means, and responsive to the call-type type signal, for changing a combination of the plurality of information signals and the plurality of message-code signals to support the several different channel rates for the several information signals having several different channel rates. 2. The spread-spectrum system as set forth in claim 1, with said spread-spectrum processing means including:code-generation means for generating the pilot-code signal and the plurality of message-code signals; andspreading means for spread-spectrum processing the plurality of information signals with the plurality of message-code signals to generate the plurality of spread-spectrum processed-message signals, respectively. 3. The spread-spectrum system as set forth in claim 2, with said code-generation means generating a timing signal, with the pilot-code signal and synchronizing the plurality of message-code signals to the timing signal. 4. The spread-spectrum system as set forth in claim 1, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 5. The spread-spectrum system as set forth in claim 2, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 6. The spread-spectrum system as set forth in claim 3, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 7. A spread-spectrum system comprising:an assignor for assigning each information signal, of a plurality of information signals arriving at an input to said spread-spectrum system, to a message-code signal, of a plurality of message-code signals, with each message-code signal in the plurality of message-code signals different from other message-code signals in the plurality of message-code signals;a spread-spectrum processor, coupled to said assignor, for generating a pilot-code signal, and for spread-spectrum processing the plurality of information signals with the plurality of message-code signals to generate a plurality of spread-spectrum processed-message signals, respectively, with the plurality of message-code signals synchronized to the pilot-code signal; anda transmitter, coupled to said spread-spectrum processor, for combining the plurality of spread-spectrum processed-message signals and the pilot-code signal to generate a CDM signal, for modulating the CDM signal with a carrier signal to generate a modulated-carrier signal, and for transmitting the modulated carrier-signal over a communications channel using radio waves; andthe spread-spectrum system with several information signals of the plurality of information signals having several different channel rates, and each of the plurality of message-code signals supporting a pre-determined information-channel rate, the spread-spectrum system further comprising:a call processor for providing a call-type signal corresponding to the information signal rate for the several information signals having several different channel rates; andinformation-channel-mode modification means, coupled to said assignor and to said spread-spectrum processor, and responsive to the call-type signal, for changing a combination of the plurality of information signals and the plurality of message-code signals to support the several different channel rates for the several information signals having several different channel rates. 8. The spread-spectrum system as set forth in claim 7, with said spread-spectrum processor including:a code generator for generating the pilot-code signal and the plurality of message-code signals; anda plurality of spreading devices, coupled to said code generator, for spread-spectrum processing the plurality of information signals with the plurality of message-code signals to generate the plurality of spread-spectrum processed-message signals, respectively. 9. The spread-spectrum system as set forth in claim 7, with said code generator generating a timing signal, with the pilot-code signal and the plurality of message-code signals synchronized to the timing signal. 10. The spread-spectrum system as set forth in claim 7, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 11. The spread-spectrum system as set forth in claim 8, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 12. The spread-spectrum system as set forth in claim 9, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 13. A spread-spectrum method comprising the steps of:assigning each information signal of a plurality of information signals, to a message-code signal, of a plurality of message-code signals, with each message-code signal in the plurality of message-code signals different from other message-code signals in the plurality of message-code signals;spread-spectrum processing the plurality of information signals with the plurality of message-code signals to generate a plurality of spread-spectrum processed-message signals, respectively, with the plurality of message-code signals synchronized to a pilot-code signal;combining the plurality of spread-spectrum processed-message signals and the pilot-code signal to generate a CDM signal;modulating the CDM signal with a carrier signal to generate a modulated-carrier signal; andtransmitting the modulated carrier-signal over a communications channel using radio waves; andthe spread-spectrum method with several information signals of the plurality of information signals having several different channel rates, and each of the plurality of message-code signals supporting a pre-determined information-channel rate, the method further comprising the steps of:providing a call-type signal corresponding to the information signal rate for the several information signals having several different channel rates; andchanging, in response to the call-type signal, a com bination of the plurality of information signals and the plurality of message-code signals to support the several different channel rates for the several information signals having several different channel rates. 14. The spread-spectrum system as set forth in claim 13, with the step of spread-spectrum processing including the steps of:generating the pilot-code signal and the plurality of message-code signals; andspreading the plurality of information signals with a plurality of message-code signals to generate the plurality of spread-spectrum processed-message signals, respectively. 15. The spread-spectrum method as set forth in claim 13, further including the step of generating a timing signal, with the pilot-code signal and the plurality of message-code signals synchronized to the timing signal. 16. The spread-spectrum method as set forth in claim 13, further including the step of generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 17. The spread-spectrum method as set forth in claim 14, further including the step of generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 18. The spread-spectrum method as set forth in claim 15, further including the step of generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 19. A spread-spectrum system comprising:receiver means for receiving a modulated-carrier signal from a communications channel using radio waves, and for demodulating, from the modulated-carrier signal, a code-division-multiplexed (CDM) signal having a pilot-code signal and a plurality of spread-spectrum processed-message signals;despreading means for correlating the CDM signal with a replica of a pilot-code signal to produce an acquisition signal when the pilot-code signal is present in the CDM signal, and responsive to the pilot-code signal present in the CDM signal, for producing a timing signal;said despreading means, responsive to the acquisition signal, for adjusting, to minimize error, phase between the pilot-code signal and the replica of the pilot-code signal; andsaid despreading processing means for correlating the CDM signal with a plurality of replicas of the message-code signals, with the plurality of replicas of the message code signals synchronized to the timing signal, to produce a plurality of message signals; andthe spread-spectrum system with a first message signal from the plurality of message signals including a first information signal and a first message-type signal corresponding to a first information-signal rate of the first information signal from the plurality of information signals, the spread-spectrum system further including information-channel-mode-modification means, responsive to the first message-type signal, for changing a receiver-information signal from a first message code to a second message code with the second message code supporting a second information-signal rate, with the second information-signal rate different from the first information-signal rate of the first message code. 20. The spread-spectrum system as set forth in claim 19, further including means for detecting from the modulated-carrier signal, a plurality of user identification signals and call-type signals, associated with the plurality of message signals, respectively. 21. The spread-spectrum system as set forth in claim 20, with the plurality of message signals including the plurality of user-identification signals and call-type signals, said spread-spectrum system further including a subscriber controller, responsive to the plurality of user-identification signals, for providing call-type signals for a plurality of received-information signals to a plurality of local subscribers. 22. A spread-spectrum system comprising:a receiver for receiving a modulated-carrier signal from a communications channel using radio waves, and for demo dulating, from the modulated-carrier signal, a code-division-multiplexed (CDM) signal having a pilot-code signal and a plurality of spread-spectrum processed-message signals;a despreader for correlating the CDM signal with a replica of a pilot-code signal to produce an acquisition signal when the pilot-code signal is present in the CDM signal, and responsive to the pilot-code signal present in the CDM signal, for producing a timing signal;said despreader, responsive to the acquisition signal, for adjusting, to minimize error, phase between the pilot-code signal and the replica of the pilot-code signal; andsaid despreader for correlating the CDM signal with a plurality of replicas of the message-code signals, with the plurality of replicas of the message code signals synchronized to the timing signal, to produce a plurality of message signals; andthe spread-spectrum system with a first message signal from the plurality of message signals including a first information signal and a first message-type signal corresponding to a first information-signal rate of the first information signal from the plurality of information signals, the spread-spectrum system further including information-channel-mode-modification means, responsive to the first message-type signal, for changing a receiver-information signal from a first message code to a second message code with the second message code supporting a second information-signal rate, with the second information-signal rate different from the first information-signal rate of the first message code. 23. The spread-spectrum system as set forth in claim 22, further including a detector for detecting from the modulated-carrier signal, a plurality of user identification signals and call-type signals, associated with the plurality of message signals, respectively. 24. The spread-spectrum system as set forth in claim 22, with the plurality of message signals including the plurality of user-identification signals and call-type signals, said spread-spectrum system further including a subscriber controller, responsive to the plurality of user-identification signals, for providing call-type signals for a plurality of received-information signals to a plurality of local subscribers. 25. A spread-spectrum method comprising the steps of:receiving a modulated-carrier signal from a communications channel using radio waves;demodulating, from the modulated-carrier signal, a code-division-multiplexed (CDM) signal having a pilot-code signal and a plurality of spread-spectrum processed-message signals;correlating the CDM signal with a replica of a pilot-code signal to produce an acquisition signal when the pilot-code signal is present in the CDM signal;producing, in response to the pilot-code signal present in the CDM signal, a timing signal;adjusting, in response to the acquisition signal, to minimize error, phase between the pilot-code signal and the replica of the pilot-code signal; andcorrelating the CDM signal with a plurality of replicas of the message-code signals, with the plurality of replicas of the message code signals synchronized to the timing signal, to produce a plurality of message signals; andthe spread-spectrum method with a first message signal from the plurality of message signals including a first information signal and a first message-type signal corresponding to a first information-signal rate of the first information signal from the plurality of information signals, the spread-spectrum method further including the step of changing, in response to the first message-type signal, a receiver-information signal from a first message code to a second message code with the second message code supporting a second information-signal rate, with the second information-signal rate different from the first information-signal rate of the first message code. 26. The spread-spectrum method as set forth in claim 25, further including the step of detecting from the modulated-carrier signal, a plurality o f user identification signals and call-type signals, associated with the plurality of message signals, respectively. 27. The spread-spectrum method as set forth in claim 25, with the plurality of message signals including the plurality of user-identification signals and call-type signals, the spread-spectrum method further including the step of providing, to the plurality of user-identification signals, call-type signals for a plurality of received-information signals to a plurality of local subscribers. 28. A spread-spectrum system comprising:assignment means for assigning each information signal of a plurality of information signals arriving at an input to said spread-spectrum system, to a message-code signal, of a plurality of message-code signals, with each message-code signal in the plurality of message-code signals different from other message-code signals in the plurality of message-code signals;spread-spectrum processing means for generating a pilot-code signal, and for spread-spectrum processing the plurality of information signals with the plurality of message-code signals to generate a plurality of spread-spectrum processed-message signals, respectively, with the plurality of message-code signals synchronized to the pilot-code signal;transmitter means, coupled to said spread-spectrum processing means, for combining the plurality of spread-spectrum processed-message signals and the pilot-code signal to generate a code-division-multiplexed (CDM) signal, for modulating the CDM signal with a carrier signal to generate a modulated-carrier signal, and for transmitting the modulated-carrier signal over a communications channel using radio waves;receiver means for receiving the modulated-carrier signal from the communications channel, and for demodulating the CDM signal from the modulated-carrier signal;despreading means for correlating the CDM signal with a replica of the pilot-code signal to produce an acquisition signal when the pilot-code signal is present in the CDM signal, and responsive to the pilot-code signal present in the CDM signal, for producing a timing signal;said despreading means, responsive to the acquisition signal, for adjusting, to minimize error, phase between the pilot-code signal and the replica of the pilot-code signal; andsaid despreading means for correlating the CDM signal with a plurality of replicas of the message-code signals, with the plurality of replicas of the message code signals synchronized to the timing signal, to produce a plurality of message signals; andthe spread-spectrum method with a first message signal from the plurality of message signals including a first information signal and a first message-type signal corresponding to a first information-signal rate of the first information signal from the plurality of information signals, the spread-spectrum method further including the step of changing, in response to the first message-type signal, a receiver-information signal from a first message code to a second message code with the second message code supporting a second information-signal rate, with the second information-signal rate different from the first information-signal rate of the first message code. 29. The spread-spectrum system as set forth in claim 28, with said spread-spectrum processing means including:code-generation means for generating the pilot-code signal and the plurality of message-code signals; andspreading means for spread-spectrum processing the plurality of information signals with the plurality of message-code signals to generate the plurality of spread-spectrum processed-message signals, respectively. 30. The spread-spectrum system as set forth in claim 29, with said code-generation means generating a timing signal with the pilot-code signal and the plurality of message-code signals synchronized to the timing signal. 31. The spread-spectrum system as set forth in claim 28, further including code means for generating the pilot-code signal and the pluralit y of message-code signals from a family of code-generation seeds. 32. The spread-spectrum system as set forth in claims 29 , further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 33. The spread-spectrum system as set forth in claim 30, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 34. The spread-spectrum system as set forth in claim 28, further including detecting means for detecting from the modulated-carrier signal, a plurality of user identification signals and call-type signals, associated with the plurality of message signals, respectively. 35. The spread-spectrum system as set forth in claim 29, with the plurality of message signals including the plurality of user-identification signals and call-type signals, said spread-spectrum system further including a subscriber controller, responsive to the plurality of user-identification signals, for providing call-type signals for a plurality of received-information signals to a plurality of local subscribers. 36. A spread-spectrum system comprising:an assignor for assigning each information signal of a plurality of information signals arriving at an input to said spread-spectrum system, to a message-code signal, of a plurality of message-code signals, with each message-code signal in the plurality of message-code signals different from other message-code signals in the plurality of message-code signals;a spread-spectrum processor, coupled to said assignor, for generating a pilot-code signal, and for spread-spectrum processing the plurality of information signals with the plurality of message-code signals to generate a plurality of spread-spectrum processed-message signals, respectively, with the plurality of message-code signals synchronized to the pilot-code signal;a transmitter, coupled to said spread-spectrum processor, for combining the plurality of spread-spectrum processed-message signals and the pilot-code signal to generate a CDM signal, for modulating the CDM signal with a carrier signal to generate a modulated-carrier signal, and for transmitting the modulated carrier-signal over a communications channel using radio waves;a receiver for receiving the modulated-carrier signal from the communications channel, and for demodulating the CDM signal from the modulated-carrier signal;a despreader for correlating the CDM signal with a replica of the pilot-code signal to produce an acquisition signal when the pilot-code signal is present in the CDM signal, and responsive to the pilot-code signal present in the CDM signal, for producing a timing signal;said despreader, responsive to the acquisition signal, for adjusting, to minimize error, phase between the pilot-code signal and the replica of the pilot-code signal; andsaid despreader for correlating the CDM signal with a plurality of replicas of the message-code signals, with the plurality of replicas of the message code signals synchronized to the timing signal, to produce a plurality of message signals; andthe spread-spectrum system with several information signals of the plurality of information signals having several different channel rates, and each of the plurality of message-code signals supporting a pre-determined information-channel rate, the spread-spectrum system further comprising:a call processor for providing a call-type signal corresponding to the information signal rate for the several information signals having several different channel rates; andinformation-channel-mode modification means, coupled to said assignor and to said spread-spectrum processor, and responsive to the call-type signal, for changing a combination of the plurality of information signals and the plurality of message-code signals to support the several different channel rates for the several information signals having several different channel rates . 37. The spread-spectrum system as set forth in claim 36, with said spread-spectrum processor including:a code generator for generating the pilot-code signal and the plurality of message-code signals; anda plurality of spreading devices, coupled to said code generator, for spread-spectrum processing the plurality of information signals with the plurality of message-code signals to generate the plurality of spread-spectrum processed-message signals, respectively. 38. The spread-spectrum system as set forth in claim 36, with said code generator generating a timing signal with the pilot-code signal and the plurality of message-code signals synchronized to the timing signal. 39. The spread-spectrum system as set forth in claim 36, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 40. The spread-spectrum system as set forth in claim 37, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 41. The spread-spectrum system as set forth in claim 38, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 42. The spread-spectrum system as set forth in claim 36, further including a detector for detecting from the modulated-carrier signal, a plurality of user identification signals and call-type signals, associated with the plurality of message signals, respectively. 43. The spread-spectrum system as set forth in claim 36, with the plurality of message signals including the plurality of user-identification signals and call-type signals, said spread-spectrum system further including a subscriber controller, responsive to the plurality of user-identification signals, for providing call-type signals for a plurality of received-information signals to a plurality of local subscribers. 44. A spread-spectrum method comprising the steps of:assigning each information signal of a plurality of information, to a message-code signal, of a plurality of message-code signals, with each message-code signal in the plurality of message-code signals different from other message-code signals in the plurality of message-code signals;spread-spectrum processing the plurality of information signals with the plurality of message-code signals to generate a plurality of spread-spectrum processed-message signals, respectively, with the plurality of message-code signals synchronized to a pilot-code signal;combining the plurality of spread-spectrum processed-message signals and the pilot-code signal to generate a CDM signal;modulating the CDM signal with a carrier signal to generate a modulated-carrier signal;transmitting the modulated-carrier signal over a communications channel using radio waves;receiving a modulated-carrier signal from a communications channel;demodulating the CDM signal from the modulated-carrier signal;correlating the CDM signal with a replica of the pilot-code signal to produce an acquisition signal when the pilot-code signal is present in the CDM signal;producing, in response to the pilot-code signal present in the CDM signal, a timing signal;adjusting, in response to the acquisition signal, to minimize error, phase between the pilot-code signal and the replica of the pilot-code signal; andcorrelating the CDM signal with a plurality of replicas of the message-code signals, with the plurality of replicas of the message code signals synchronized to the timing signal, to produce a plurality of message signals; andthe spread-spectrum method with several information signals of the plurality of information signals having several different channel rates, and each of the plurality of message-code signals supporting a pre-determined information-channel rate, the method further comprising the steps of:providing a call-type signal corresponding to the information signal rate f or the several information signals having several different channel rates; andchanging in response to the call-type signal, a combination of the plurality of information signals and the plurality of message-code signals to support the several different channel rates for the several information signals having several different channel rates. 45. The spread-spectrum method as set forth in claim 44, with the step of spread-spectrum processing including the steps of:generating the pilot-code signal and the plurality of message-code signals; andspreading the plurality of information signals with the plurality of message-code signals to generate the plurality of spread-spectrum processed-message signals, respectively. 46. The spread-spectrum method as set forth in claim 44, further including the step of generating a timing signal, with the pilot-code signal and the plurality of message-code signals synchronized to the timing signal. 47. The spread-spectrum method as set forth in claim 44, further including the step of generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 48. The spread-spectrum method as set forth in claim 45, further including the step of generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 49. The spread-spectrum method as set forth in claim 46, further including the step of generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 50. The spread-spectrum method as set forth in claim 44, further including the step of detecting from the modulated-carrier signal, a plurality of user identification signals and call-type signals, associated with the plurality of message signals, respectively. 51. The spread-spectrum method as set forth in claim 44, with the plurality of message signals including the plurality of user-identification signals and call-type signals, the spread-spectrum method further including the step of providing, to the user-identification signals, call-type signals for a plurality of received-information signals to a plurality of local subscribers.
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