IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0635986
(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 :
34 인용 특허 :
93 |
초록
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A spread-spectrum system having an assignor, a spread-spectrum processor, a call processor, and an information-channel-mode modifier. The assignor assigns each information signal arriving at the spread-spectrum system to a message-code signal. Each of the message-code signals supports a pre-determin
A spread-spectrum system having an assignor, a spread-spectrum processor, a call processor, and an information-channel-mode modifier. The assignor assigns each information signal arriving at the spread-spectrum system to a message-code signal. Each of the message-code signals supports a pre-determined information-channel rate. Several information signals have different channel rates, and each information signal is assigned according to the required channel rate. The spread-spectrum processor generates a pilot-code signal, and spread-spectrum processes the information signals with the message-code signals to generate a plurality of spread-spectrum processed-message signals, respectively. The message-code signals are synchronized to the pilot-code signal. The call processor provides a call-type signal corresponding to the information signal rate for the several information signals having several different channel rates. In response to the call-type signal, the information-channel-mode modifier changes a combination of the information signals and the message-code signals to support the several different channel rates for the several information signals having several different channel rates.
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, with several information signals of the plurality of information signals having several different channel rates, t
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, with several information signals of the plurality of information signals having several different channel rates, to a message-code signal, of a plurality of message-code signals, with each of the plurality of message-code signals supporting a pre-determined information-channel rate, 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;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 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, further comprising 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, and for transmitting the CDM signal over a communications channel using radio waves. 3. 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. 4. 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. 5. The spread-spectrum system as set forth in claim 4, 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. 6. The spread-spectrum system as set forth in claim 5, 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. The spread-spectrum system as set forth in claim 4, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 8. 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. 9. 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, with several information signals of the plurality of information signals having several different channel rates, to a message-code signal, of a plurality of message-code signals, with each of the plurality of message-code signals supporting a pre-determined information-channel rate, with each message-code signal in the plurality of message-code signals different from other message-code signals in the plurality of message-code si gnals;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 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. 10. The spread-spectrum system as set forth in claim 9, further including 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, and for transmitting the CDM signal over a communications channel using radio waves. 11. The spread-spectrum system as set forth in claim 10, 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, 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. 13. The spread-spectrum system as set forth in claim 12, 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. 14. The spread-spectrum system as set forth in claim 13, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 15. The spread-spectrum system as set forth in claim 12, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 16. 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. 17. A method in a spread-spectrum system comprising the steps of:assigning each information signal of a plurality of information signals arriving at an input to said spread-spectrum system, with several information signals of the plurality of information signals having several different channel rates, to a message-code signal, of a plurality of message-code signals, with each of the plurality of message-code signals supporting a pre-determined information-channel rate, with each message-code signal in the plurality of message-code signals different from other 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;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 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. 18. The spread-spectrum method as set forth in claim 17, further comprising the steps of:combining the plurality of spread-spectrum processed-message signals and the pilot-code signal to generate a code-division-multiplexed (CDM) signal; andtransmitting the CDM signal over a communications channel using radio waves. 19. The spread-spectrum method as set forth in claim 18, further including the step of generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 20. The spread-spectrum method as set forth in claim 17, 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. 21. The spread-spectrum method as set forth in claim 20, 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. 22. The spread-spectrum method as set forth in claim 21, further including the step of generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 23. The spread-spectrum method as set forth in claim 20, further including the step of generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 24. The spread-spectrum method as set forth in claim 17, further including the step of generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 25. 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, with several information signals of the plurality of information signals having several different channel rates, to a message-code signal, of a plurality of message-code signals, with each of the plurality of message-code signals supporting a pre-determined information-channel rate, 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;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;information-channel-mode modification means, coupled to said assignment means and to said spread-spectrum processing means, 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;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 acquisit ion 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. 26. The spread-spectrum system as set forth in claim 25, 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. 27. The spread-spectrum system as set forth in claim 26, 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. 28. The spread-spectrum system as set forth in claim 27, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 29. The spread-spectrum system as set forth in claim 26, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 30. The spread-spectrum system as set forth in claim 25, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 31. The spread-spectrum system as set forth in claim 25, 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. 32. The spread-spectrum system as set forth in claim 31, 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 the call-type signals for a plurality of received-information signals to a plurality of local subscribers. 33. The spread-spectrum system as set forth in claim 25, with a first message signals 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, said 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. 34. 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, with several information signals of the plurality of information signals having several different channel rates, to a message-code signal, of a plurality of message-code signals, with each of the plurality of message-code signals supporting a pre-determined information-channel rate, 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 call processor for providing a call-type signal corresponding to the information signal rate for the several information signals having several different channel rates;information-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;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. 35. The spread-spectrum system as set forth in claim 34, 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. 36. The spread-spectrum system as set forth in claim 35, 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. 37. 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. 38. The spread-spectrum system as set forth in claim 35, further including code means for generating the pilot-code signal and the plurality of message-code signals from a family of code-generation seeds. 39. The spread-spectrum system as set forth in claim 34, 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 34, 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. 41. The spread-spectrum system as set forth in claim 40, 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 the call-type signals for a plurality of received-information signals to a pluralit y of local subscribers. 42. The spread-spectrum system as set forth in claim 41, 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, said 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. 43. The spread-spectrum system as set forth in claim 40, 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, said 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. 44. The spread-spectrum system as set forth in claim 34, 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, said 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. 45. A method in a spread-spectrum system comprising the steps of:assigning each information signal, of a plurality of information signals arriving at an input to said spread-spectrum system, with several information signals of the plurality of information signals having several different channel rates, to a message-code signal, of a plurality of message-code signals, with each of the plurality of message-code signals supporting a predetermined information-channel rate, 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;providing a call-type signal corresponding to the information signal rate for the several information signals having several different channel rates;changing, 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;combining the plurality of spread-spectrum processed-message signals and the pilot-code signal to generate a code-division-multiplexed (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 the modulated-carrier signal from the communications channel;demodulating the CDM signal from the modulated-carrier signa l;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. 46. The spread-spectrum method as set forth in claim 45, 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. 47. The spread-spectrum method as set forth in claim 46, 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. 48. The spread-spectrum method as set forth in claim 47, 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 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. 51. The spread-spectrum method as set forth in claim 45, 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. 52. The spread-spectrum method as set forth in claim 51, 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, the call-type signals for a plurality of received-information signals to a plurality of local subscribers. 53. The spread-spectrum method as set forth in claim 52, 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, said 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. 54. The spread-spectrum method as set forth in claim 51, 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, said 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. 55. The spread-spectrum method as set forth in claim 45, with a first message signal from the plurality of message signals incl uding 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, said 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.
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