IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0139004
(2005-05-26)
|
등록번호 |
US-RE41025
(2009-12-16)
|
우선권정보 |
EP-98108906(1998-05-15) |
발명자
/ 주소 |
- Stirling Gallacher, Richard
- Jurgensen, Jens Uwe
|
출원인 / 주소 |
|
대리인 / 주소 |
Frommer Lawrence & Haug LLP
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
15 |
초록
▼
According to the present invention a A transmitter and a transmitting method for communicating data symbols over a communication channel, for example, according to the CDMA system is presented . The transmitter (24, 25) comprises means (9) for spreading A spreading section spreads each data symbol w
According to the present invention a A transmitter and a transmitting method for communicating data symbols over a communication channel, for example, according to the CDMA system is presented . The transmitter (24, 25) comprises means (9) for spreading A spreading section spreads each data symbol with a respective spreading code, wherein the . The spreading codes are mutually orthogonal. Means (10) for scrambling are A scrambling section is provided to scramble each spread symbol with a respective scrambling code, the scrambling codes respectively having the same length as the spreading codes . Furthermore, means (11) for a transmission section for the transmission of the spread and scrambled symbols are provided is provided. According to the present invention the means (10) for scrambling are the scrambling section is provided with a plurality of different scrambling codes, which can be used simultaneously within the same link.
대표청구항
▼
What is claimed is: 1. Transmitter for communicating data symbols over a communication channel, the transmitter comprising: means for spreading each data symbol with a respective spreading code, wherein the spreading codes are mutually orthogonal, means for scrambling each spread symbol with a re
What is claimed is: 1. Transmitter for communicating data symbols over a communication channel, the transmitter comprising: means for spreading each data symbol with a respective spreading code, wherein the spreading codes are mutually orthogonal, means for scrambling each spread symbol with a respective scrambling code, the scrambling codes respectively having the same length as the spreading codes, and means for transmitting said spread and scrambled symbols, wherein the means for scrambling are provided with a plurality of different scrambling codes which can be used simultaneously within the same link so that a maximum data rate is increased. 2. Transmitter according to claim 1, characterized in that wherein the means for scrambling can use different scrambling codes for an uplink communication channel and a downlink communication channel, respectively. 3. Transmitter according claim 1, characterized in that wherein the spreading codes are obtained by means of a code tree. 4. Transmitter according to claim 1, characterized in that wherein only in a downlink communication channel different scrambling codes are used, wherein in an uplink channel only one scrambling code is used. 5. Transmitter according to claim 1, characterized in that wherein the means for scrambling use different scrambling codes within the same link only for channels demanding a high bit rate. 6. Transmitter according to claim 5, characterized in that wherein the means for scrambling use different scrambling codes within the same link only video channels. 7. Wireless transmission system, comprising: means for spreading each data symbol with a respective spreading code, wherein the spreading codes are mutually orthogonal, means for scrambling each spread symbol with a respective scrambling code, the scrambling codes respectively having the same length as the spreading codes, and means for transmitting said spread and scrambled symbols, wherein the means for scrambling are provided with a plurality of different scrambling codes which can be used simultaneously within the same link so that a maximum data rate is increased, and wherein a subset of scrambling codes is respectively allocated to a cell of the transmission system. 8. Wireless transmission system according to claim 7, characterized in that wherein different spreading codes are allocated to adjacent cells of the transmission system. 9. Method for the transmission of data symbols over a communication channel, comprising the following steps: spreading each data symbol with a respective spreading code, wherein the spreading codes are mutually orthogonal, scrambling each spread symbol with a respective scrambling code, the scrambling codes respectively having the same length as the spreading codes, and transmitting said spread and scrambled symbols, wherein the scrambling step provides a plurality of different scrambling codes which can be used simultaneously within the same link so that a maximum data rate is increased. 10. Method according to claim 9, characterized in that wherein in the step of scrambling different scrambling codes can be used for an uplink communication channel and a downlink communication channel, respectively. 11. Method according to claim 9, characterized in that wherein the spreading codes are obtained by means of a code tree. 12. Method according to claim 9, characterized in that wherein only in a downlink communication channel different scrambling codes are used, wherein in an uplink channel only one scrambling code is used. 13. Method according to claim 9, characterized in that wherein different scrambling codes within the same link are used only for channels demanding a high bit rate. 14. Method according to claim 13, characterized in that wherein different scrambling codes within the same link are used only for video channels. 15. A method for the transmission of data symbols over a communication channel, comprising the following steps: spreading each data symbol with a respective spreading code, wherein the spreading codes are mutually orthogonal, scrambling each spread symbol with a respective scrambling code, and transmitting the spread and scrambled symbols, wherein for the step of scrambling a plurality of different scrambling codes is provided so that a maximum data rate is increased. 16. The method according to claim 15, wherein transmitting is over a downlink and 512 different scrambling codes are provided. 17. The method according to claim 16, wherein the scrambling codes are divided in groups. 18. The method according to claim 17, wherein each scrambling code group is allocated to a cell of a transmission. 19. The method according to claim 16, wherein different user terminals in the same cell use different scrambling codes. 20. A wireless transmission system, comprising a plurality of user terminals in one cell and respectively connected with an uplink transmission to the same base station, wherein each of the user terminals comprises: means for spreading data symbols to be transmitted with a respective spreading code, wherein the spreading codes are mutually orthogonal, and means for scrambling each spread symbol with a respective scrambling code, and wherein different user terminals in the same cell use different scrambling codes so that a maximum data rate is increased. 21. A transmitter for communicating data symbols over a communication channel comprising a plurality of sub-channels, the transmitter comprising: means for spreading the data symbols of each sub-channel with a respective spreading code, wherein the spreading codes are mutually orthogonal, means for scrambling the spread symbols of each sub-channel with a scrambling code, and means for the transmission of the spread and scrambled symbols of each sub-channel, wherein said means for scrambling are designed to scramble different sub-channels with different scrambling codes so that a maximum data rate is increased. 22. Method for the transmission of data symbols over a communication channel comprising a plurality of sub-channels, comprising the following steps: spreading the data symbols of each sub-channel with a respective spreading code, wherein the spreading codes are mutually orthogonal, scrambling the spread symbols of each sub-channel with a respective scrambling code, wherein said sub-channels are scrambled with different scrambling codes so that a maximum data rate is increased, and transmitting the spread and scrambled symbols of each sub-channel.
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