Interference cancellation for wireless communications
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04W-036/18
H04W-052/54
H04B-001/7107
H04L-001/00
H04L-025/03
H04W-052/12
H04W-052/08
H04W-052/36
H04W-052/40
출원번호
US-0076095
(2013-11-08)
등록번호
US-9055545
(2015-06-09)
발명자
/ 주소
Black, Peter J.
Lott, Christopher G.
Attar, Rashid A.
Jou, Yu-Cheun
Ma, Jun
출원인 / 주소
QUALCOMM Incorporated
인용정보
피인용 횟수 :
8인용 특허 :
107
초록▼
Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of
Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of the frame may then be re-constructed at the base station prior to its reception, and cancelled from the receive signal to reduce the interference to frames received from other users. In a power control aspect for early decoding and IC, the power control target level at a local base station may be adjusted in response to successfully early decoding a frame, without affecting the overall outer loop power control operation. Further aspects include late decoding techniques for utilizing the IC of other users' signals to improve the probability of decoding a given user's frames, as well as techniques for traffic channel demodulation using channel re-estimation.
대표청구항▼
1. A method for processing a power control command for an access terminal in soft handoff, the method comprising: receiving power control commands from each base station of a plurality of base stations communicating with the access terminal in soft handoff, wherein each power control command corresp
1. A method for processing a power control command for an access terminal in soft handoff, the method comprising: receiving power control commands from each base station of a plurality of base stations communicating with the access terminal in soft handoff, wherein each power control command corresponds to a first power control group in a frame of multiple power control groups, and wherein at least one base station of the plurality of base stations transmits a power control command in response to decoding the frame; anddecreasing a transmit power of the access terminal in response to at least one of the power control commands instructing the access terminal to decrease the transmit power. 2. The method of claim 1, wherein the first power control group corresponds to a portion of the frame along a dimension. 3. The method of claim 2, wherein the dimension is time, frequency, or code. 4. The method of claim 1, wherein the power control commands are received according to a CDMA2000 specification. 5. The method of claim 1, wherein each base station of the plurality of base stations transmits a power control command in response to decoding the frame. 6. The method of claim 1, wherein the plurality of base stations receive a target power level, and wherein the power control commands are based on the target power level. 7. The method of claim 1, wherein the first power control group is a decoded power control group. 8. An apparatus for processing a power control command for an access terminal in soft handoff, the apparatus comprising: a receiver configured to receive power control commands from each base station of a plurality of base stations communicating with the access terminal in soft handoff, wherein each power control command corresponds to a first power control group in a frame of multiple power control groups, and wherein at least one base station of the plurality of base stations transmits a power control command in response to decoding the frame; anda power control module configured to decrease a transmit power of the access terminal in response to at least one of the power control commands instructing the access terminal to decrease the transmit power. 9. The apparatus of claim 8, wherein the power control group corresponds to a portion of the frame along a dimension. 10. The apparatus of claim 9, wherein the dimension is time, frequency, or code. 11. The apparatus of claim 8, wherein the power control commands are received according to a CDMA2000 specification. 12. The apparatus of claim 8, further comprising a transmitter configured to transmit the frame to the plurality of base stations, wherein each base station of the plurality of base stations transmits a power control command in response to decoding the frame. 13. The apparatus of claim 8, wherein the plurality of base stations receive a target power level, and wherein the power control commands are based on the target power level. 14. The apparatus of claim 8, wherein the first power control group is a decoded power control group. 15. An apparatus for processing a power control command for an access terminal in soft handoff, the apparatus comprising: means for receiving power control commands from each base station of a plurality of base stations communicating with the access terminal in soft handoff, wherein each power control command corresponds to a first power control group in a frame of multiple power control groups, and wherein at least one base station of the plurality of base stations transmits a power control command in response to decoding the frame; andmeans for decreasing a transmit power of the access terminal in response to at least one of the power control commands instructing the access terminal to decrease the transmit power. 16. The apparatus of claim 15, wherein the power control group corresponds to a portion of the frame along a dimension. 17. The apparatus of claim 16, wherein the dimension is time, frequency, or code. 18. The apparatus of claim 15, wherein the power control commands are received according to a CDMA2000 specification. 19. The apparatus of claim 15, further comprising means for transmitting the frame to the plurality of base stations, wherein each base station of the plurality of base stations transmits a power control command in response to decoding the frame. 20. The apparatus of claim 15, wherein the plurality of base stations receive a target power level, and wherein the power control commands are based on the target power level. 21. The apparatus of claim 15, wherein the first power control group is a decoded power control group. 22. A non-transitory computer readable medium for processing a power control command for an access terminal in soft handoff, the non-transitory computer readable medium comprising operational instructions that, when executed by a processor, cause the processor to perform operations including: receiving power control commands from each base station of a plurality of base stations communicating with the access terminal in soft handoff, wherein each power control command corresponds to a first power control group in a frame of multiple power control groups, and wherein at least one base station of the plurality of base stations transmits a power control command in response to decoding the frame; anddecreasing a transmit power of the access terminal in response to at least one of the power control commands instructing the access terminal to decrease the transmit power. 23. The non-transitory computer readable medium of claim 22, wherein the power control group corresponds to a portion of the frame along a dimension. 24. The non-transitory computer readable medium of claim 23, wherein the dimension is time, frequency, or code. 25. The non-transitory computer readable medium of claim 22, wherein the power control commands are received according to a CDMA2000 specification. 26. The non-transitory computer readable medium of claim 22, wherein each base station of the plurality of base stations transmits a power control command in response to decoding the frame. 27. The non-transitory computer readable medium of claim 22, wherein the plurality of base stations receive a target power level, and wherein the power control commands are based on the target power level. 28. The non-transitory computer readable medium of claim 22, wherein the first power control group is a decoded power control group.
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이 특허에 인용된 특허 (107)
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Chen,Tao; Wei,Yongbin; Jain,Avinash; Tiedemann, Jr.,Edward G., Forward and reverse link power control of serving and non-serving base stations in a wireless communication system.
Frank, Colin D.; Visotsky, Eugene; Choudhary, Prashant; Ghosh, Amitava, Linear minimum mean square error equalization with interference cancellation for mobile communication forward links utilizing orthogonal codes covered by long pseudorandom spreading codes.
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