[특허]Method and system for signal reconstruction from spatially and temporally correlated received samples

Qualcomm Incorporated

검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
검색연산자

검색도움말
검색연산자	기능	검색시 예
()	우선순위가 가장 높은 연산자	예1) (나노 (기계 \| machine))
공백	두 개의 검색어(식)을 모두 포함하고 있는 문서 검색	예1) (나노 기계) 예2) 나노 장영실
\|	두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색	예1) (줄기세포 \| 면역) 예2) 줄기세포 \| 장영실
!	NOT 이후에 있는 검색어가 포함된 문서는 제외	예1) (황금 !백금) 예2) !image
*	검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색	예) semi*
""	따옴표 내의 구문과 완전히 일치하는 문서만 검색	예) "Transform and Quantization"

과학기술 지식인프라 ScienceON

연합인증

연합인증 가입 기관의 연구자들은 소속기관의 인증정보(ID와 암호)를 이용해 다른 대학, 연구기관, 서비스 공급자의 다양한 온라인 자원과 연구 데이터를 이용할 수 있습니다.

이는 여행자가 자국에서 발행 받은 여권으로 세계 각국을 자유롭게 여행할 수 있는 것과 같습니다.

연합인증으로 이용이 가능한 서비스는 NTIS, DataON, Edison, Kafe, Webinar 등이 있습니다.

한번의 인증절차만으로 연합인증 가입 서비스에 추가 로그인 없이 이용이 가능합니다.

다만, 연합인증을 위해서는 최초 1회만 인증 절차가 필요합니다. (회원이 아닐 경우 회원 가입이 필요합니다.)

연합인증 절차는 다음과 같습니다.

최초이용시에는
ScienceON에 로그인 → 연합인증 서비스 접속 → 로그인 (본인 확인 또는 회원가입) → 서비스 이용

그 이후에는
ScienceON 로그인 → 연합인증 서비스 접속 → 서비스 이용

연합인증을 활용하시면 KISTI가 제공하는 다양한 서비스를 편리하게 이용하실 수 있습니다.

특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Method and system for signal reconstruction from spatially and temporally correlated received samples

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-003/36
미국특허분류(USC)	375/148; 375/144; 375/150
출원번호	US-0501972 (2006-08-09)
등록번호	US-8385388 (2013-02-26)
발명자 / 주소	Soriaga, Joseph B. Bhushan, Naga Hou, Jilei Chen, Jinghu Smee, John Edward
출원인 / 주소	Qualcomm Incorporated
인용정보	피인용 횟수 : 2 인용 특허 : 120

초록
▼

A method and system for reconstructing a user's received signal based on knowledge of the user's transmitted signal to yield efficient interference cancellation when there is spatial and/or temporal correlation in the received signal. The invention may be applied to the cancellation of pilot, decoded data and overhead signals. The method may involve a linear combination of the received samples across time, e.g., at a per-chip or sub-chip resolution, and across antennas, and build upon previous work in that the tap weights need not be the sole functions o...

대표
청구항
▼

1. A method for computing a reconstructed desired user's signal contribution from a received signal, comprising: estimating spatial correlation of a plurality of received samples of the received signal;estimating spatial correlation of a plurality of channel coefficients of the received signal, the plurality of channel coefficients comprising signal amplitudes of various paths, including delay, received at multiple antennas;calculating the spatial correlation of a desired user's signal based on the estimated spatial correlation of the plurality of channel coefficients of the received signal; andcomputing the reconstructed desired user's signal contribution based on the calculated spatial correlation of the desired user's signal and the estimated spatial correlation of the plurality of received samples. 2. The method of claim 1, further comprising: estimating temporal correlation of the plurality of received samples of the received signal;estimating temporal correlation of the plurality of channel coefficients of the received signal; andcalculating the temporal correlation of the desired user's signal. 3. The method of claim 2, further comprising: obtaining a reconstruction matrix. 4. The method of claim 2, wherein the received signal with respect to a desired user may be represented by g(m)⁡[k]=∑l=1L⁢h(m),l⁡[k]⁢s⁡[k-dl]+z(m)⁡[k],⁢for⁢⁢k=1,…⁢,N⁢⁢and⁢⁢m=1,…⁢,M,where k is the time-index reflecting a per-chip or sub-chip resolution, h(m),l[k] is the amplitude of the l-th path having a delay dl that is received at the m-th antenna, the delay dl may be time-varying, s[k] is the known signal of the user that is to be cancelled, and z(m)[k] is the additive noise representing received signals from at least other users, other-cell interference, and thermal noise. 5. The method of claim 4, wherein the additive noise z(m)[k] is uncorrelated with g(m)[k]. 6. The method of claim 4, wherein s[k] is a transmitted sequence and comprises at least one of data-, pilot- or overhead-sequence followed by a spreading sequence. 7. The method of claim 4, wherein if k corresponds to a sub-chip resolution, then s[k] further includes a convolution with the transmit and receive filters. 8. The method of claim 2, wherein the reconstructed desired user's signal contribution is represented by ĝ=Wy,where the vector g is represented byg=[g(l)[l], . . . , g(l)[N], . . . , g(M)[l], . . . , g(M)[N]]T, the vector y is represented byy=[y(l)[l], . . . , y(l)[N], . . . , y(M)[l], . . . , y(M)[N]]T, and the reconstruction matrix W is solved from WR(y,y)=R(g,y). 9. The method of claim 2, wherein in a scenario of a single-antenna multipath channel at sub-chip resolution, the received signal may be represented by g⁡[k]=∑l=1L⁢hl⁢s⁡[k-τl]+z⁡[k],for⁢⁢k=1,…⁢,N⁢⁢and⁢⁢m=1,…⁢⁢M,where k is the time-index in chip multiples, s[k] is the user's known signal, hl is the amplitude of the l-th path channel with delay τl, and z[k] may represent received signals from at least other users, other-cell interference, and thermal noise. 10. The method of claim 9, wherein if the transmit-receive pulse is φ[k], where k reflects sampling at d times a chip frequency, then the known user's signal equals s[k]=x[k]{circle around (x)}φ[k], where x[k] is an upsampled coded-sequence. 11. The method of claim 10, wherein for closely spaced paths with τl-τl−1 near one chip interval, the presence of φ[k] may cause conventional de-spreading techniques to give bad channel path estimates. 12. The method of claim 10, wherein the closely spaced paths are referred to as fat-paths. 13. The method of claim 12, wherein in a moderate-to-high signal-to-noise ratio regime, the spatial and temporal correlation calculating of the desired user's signal may be further simplified to compensate for fat-paths and represented by [h^(-T)h^(-T+1)⋮h^(T)]=(ΦH⁢Φ)-1⁢ΦH⁡[c⁡[-T]c⁡[-T+1]⋮c⁡[T]],whereΦ=[ϕ⁡[-2⁢T]ϕ⁡[-2⁢T+1]⋯ϕ⁡[0]ϕ⁡[-2⁢T+1]⋱⋮⋱ϕ⁡[0]ϕ⁡[1]ϕ⁡[2⁢T]]. 14. The method of claim 1, wherein in a scenario of a single-path multiple antenna channel at per-chip resolution, the received signal may be represented by g(m)[k]=h(m)s[k], for k=1, . . . , N and m=1, . . . , M , where k is the time index in chips, h(m) is the static over the duration N fade coefficient, s[k] is the spread data, pilot, or overhead signal, and z(m)[k] may represent received signals from at least other users, other-cell interference, and thermal noise. 15. The method of claim 14, wherein |s[k]|=1 and s[k] is known at a receiver. 16. The method of claim 14, wherein additive noise z(m)[k] is further modeled as an independently, identically distributed zero-mean signal, for all k=1, . . . , N . 17. The method of claim 16, wherein the additive noise z(m)[k] is uncorrelated with g(m)[k]. 18. The method of claim 14, wherein the reconstructed desired user's signal contribution is represented by g^⁡[k]=s⁡[k]N⁢R⁡(h,h)⁢(R⁡(h,h)+R⁡(z,z)N)-1⁢∑j=1N⁢s*⁡[j]⁢y⁡[j]. 19. The method of claim 1, wherein the signal comprises a Code Division Multiple Access (CDMA) or a Wideband CDMA (W-CDMA) signal. 20. An apparatus for computing a reconstructed desired user's signal contribution from a received signal, comprising: means for estimating spatial correlation of a plurality of received samples of the received signal;means for estimating spatial correlation of a plurality of channel coefficients of the received signal, the plurality of channel coefficients comprising signal amplitudes of various paths, including delay, received at multiple antennas;means for calculating the spatial correlation of a desired user's signal based on estimated spatial correlation of the plurality of channel coefficients of the received signal; andmeans for computing the reconstructed desired user's signal contribution based on calculated spatial correlation of the desired user's signal and estimated spatial correlation of the plurality of received samples. 21. The apparatus of claim 20, further comprising: means for estimating temporal correlation of the plurality of received samples of the received signal;means for estimating temporal correlation of the plurality of channel coefficients of the received signal; andmeans for calculating the temporal correlation of the desired user's signal. 22. The apparatus of claim 21, further comprising: means for obtaining a reconstruction matrix. 23. The apparatus of claim 21, wherein the received signal may be represented by g(m)⁡[k]=∑l=1L⁢h(m),l⁡[k]⁢s⁡[k-dl],⁢for⁢⁢k=1,…⁢,N⁢⁢and⁢⁢m=1,…⁢,M,where k is the time-index reflecting a per-chip or sub-chip resolution, h(m),l[k] is the amplitude of the l-th path having a delay dl that is received at the m-th antenna, the delay dl may be time-varying, s[k] is the known signal of the user that is to be cancelled, and z(m)[k] is the additive noise representing received signals from at least other users, other-cell interference, and thermal noise. 24. The apparatus of claim 23, wherein the additive noise z(m)[k] is uncorrelated with g(m)[k]. 25. The apparatus of claim 23, wherein s[k] is a transmitted sequence and comprises at least one of data-, pilot- or overhead-sequence followed by a spreading sequence. 26. The apparatus of claim 23, wherein if k corresponds to a sub-chip resolution, then s[k] further includes a convolution with the transmit and receive filters. 27. The apparatus of claim 21, wherein the reconstructed desired user's signal contribution is represented by ĝ=Wy,where the vector g is represented byg=[g(l)[l], . . . , g(l)[N], . . . , g(M)[l], . . . , g(M)[N]]T, the vector y is represented byy=[y(l)[l], . . . , y(l)[N], . . . , y(M)[l], . . . , y(M)[N]]T, and the reconstruction matrix W is solved from WR(y,y)=R(g,y). 28. The apparatus of claim 21, wherein in a scenario of a single-antenna multipath channel at sub-chip resolution, the received signal may be represented by g⁡[k]=∑l=1L⁢hl⁢s⁡[k-τl],for⁢⁢k=1,…⁢,N⁢⁢and⁢⁢m=1,…⁢⁢M,where k is the time-index in chip multiples, s[k] is the user's known signal, hl is the amplitude of the l-th path channel with delay τl, and z[k] may represent received signals from at least other users, other-cell interference, and thermal noise. 29. The apparatus of claim 28, wherein if the transmit-receive pulse is φ[k] , where k reflects sampling at d times a chip frequency, then the known user's signal equals s[k]=x[k]{circle around (x)}φ[k], where x[k] is an upsampled coded-sequence. 30. The apparatus of claim 29, wherein for closely spaced paths with τl-τl−1 near one chip interval, the presence of φ[k] may cause conventional de-spreading techniques to give bad channel path estimates. 31. The apparatus of claim 29, wherein the closely spaced paths are referred to as fat-paths. 32. The apparatus of claim 31, wherein in a moderate-to-high signal-to-noise ratio regime, the calculating means of the spatial and temporal correlation of the desired user's signal may be further simplified to compensate for fat-paths and represented by [h^(-T)h^(-T+1)⋮h^(T)]=(ΦH⁢Φ)-1⁢ΦH⁡[c⁡[-T]c⁡[-T+1]⋮c⁡[T]],whereΦ=[ϕ⁡[-2⁢T]ϕ⁡[-2⁢T+1]⋯ϕ⁡[0]ϕ⁡[-2⁢T+1]⋱⋮⋱ϕ⁡[0]ϕ⁡[1]ϕ⁡[2⁢T]]. 33. The apparatus of claim 20, wherein in a scenario of a single-path multiple antenna channel at per-chip resolution, the received signal may be represented by g(m)[k]=h(m)s[k], for k=1, . . . , N and m=1, . . . , M,where k is the time index in chips, h(m) is the static over the duration N fade coefficient, s[k] is the spread data, pilot, or overhead signal, and z(m)[k] may represent received signals from at least other users, other-cell interference, and thermal noise. 34. The apparatus of claim 33, wherein |s[k]|=1 and s[k] is known at a receiver. 35. The apparatus of claim 33, wherein additive noise z(m)[k] is further modeled as an independently, identically distributed zero-mean signal, for all k=1, . . . , N. 36. The apparatus of claim 35, wherein the additive noise z(m)[k] is uncorrelated with g(m)[k]. 37. The apparatus of claim 33, wherein the reconstructed desired user's signal contribution is represented by g^⁡[k]=s⁡[k]N⁢R⁡(h,h)⁢(R⁡(h,h)+R⁡(z,z)N)-1⁢∑j=1N⁢s*⁡[j]⁢y⁡[j]. 38. The apparatus of claim 20, wherein the signal comprises a Code Division Multiple Access (CDMA) or a Wideband CDMA (W-CDMA) signal. 39. An interference cancellation (IC) apparatus comprising: a receiver configured to receive a received signal; anda module configured to perform interference cancellation and to compute a reconstructed desired user's signal contribution from spatially and temporally correlated received samples of the received signal and spatially and temporally correlated channel coefficients of the received signal, the channel coefficients comprising signal amplitudes of various paths, including delay, received at multiple antennas;wherein the module is further configured to calculate spatial and temporal correlation of a desired user's signal based on the spatially and temporally correlated channel coefficients, and further wherein computation of the reconstructed desired user's signal contribution is based on calculated spatial and temporal correlation of the desired user's signal and the spatially and temporally correlated received samples. 40. The apparatus of claim 39, wherein the module comprises: means for estimating spatial and temporal correlation of the received samples;means for estimating spatial and temporal correlation of the plurality of channel coefficients of the received signal;means for calculating spatial and temporal correlation of a desired user's signal based on estimated spatial correlation of the plurality of channel coefficients of the received signal; andmeans for computing the reconstructed desired user's signal contribution based on calculated spatial and temporal correlation of the desired user's signal and estimated spatial and temporal correlation of the plurality of received samples. 41. The apparatus of claim 40, further comprising: means for obtaining a reconstruction matrix. 42. A non-transitory computer readable medium embodying a method of computing a reconstructed desired user's signal contribution from a received signal, the method comprising: estimating spatial correlation of a plurality of received samples of the received signal;estimating spatial correlation of a plurality of channel coefficients of the received signal, the plurality of channel coefficients comprising signal amplitudes of various paths, including delay, received at multiple antennas;calculating the spatial correlation of a desired user's signal based on the estimated spatial correlation of the plurality of channel coefficients of the received signal; andcomputing the reconstructed desired user's signal contribution based on the calculated spatial correlation of the desired user's signal and the estimated spatial correlation of the plurality of received samples.

이 특허에 인용된 특허 (120)

이 특허를 인용한 특허 피인용횟수: 2

IPC 상위 출원인

내보내기

상세정보
내보내기 구분	파일저장 인쇄 메일전송
구성항목	관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	> 총 건의 자료가 검색되었습니다. > 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) > 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. > 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) > 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오 > ~ > Text(ASCII format) Excel format

과학기술 지식인프라 ScienceON

ScienceON Chatbot

연합인증

특허 상세정보

Method and system for signal reconstruction from spatially and temporally correlated received samples

초록
▼

대표
청구항
▼

이 특허에 인용된 특허 (120)

이 특허를 인용한 특허 피인용횟수: 2

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

참여연구원의 다른 문헌(0)

처리중입니다.

잠시만 기다려주세요.

ScienceON Chatbot

연합인증

특허 상세정보

Method and system for signal reconstruction from spatially and temporally correlated received samples

초록 ▼

대표청구항 ▼

이 특허에 인용된 특허 (120)

이 특허를 인용한 특허 피인용횟수: 2

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

참여연구원의 다른 문헌(0)

처리중입니다.

잠시만 기다려주세요.

초록
▼

대표
청구항
▼