KR102276187B1 - 직교 시간 주파수 공간 변조된 신호들의 반복적 2차원 등화 - Google Patents
직교 시간 주파수 공간 변조된 신호들의 반복적 2차원 등화 Download PDFInfo
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Abstract
Description
도 1은, 예시적 통신 네트워크를 도시한 도면이다.
도 2는, 예시적 무선 통신의 수신 방법의 흐름도이다.
도 3은, 또 다른 예시적 무선 통신의 수신 방법의 흐름도이다.
도 4는, 무선 송수신 장치의 일례를 도시한다.
도 5는, 예시적 2차원 반복적 등화기를 도시한 블록도이다.
도 6은, 자기-반복적(self-iterative) 2차원 등화기의 일례를 도시한 블록도이다.
Claims (15)
- 반복적 2차원 등화(iterative two dimensional equalization)를 수행함으로써, 수신 신호로부터 정보 비트들을 복원하는 무선 통신 방법으로서,
반복적 등화기(iterative equalizer)에서, 상기 수신 신호가 수신된 무선 채널의 2차원 추정치, 수신 심볼들의 스트림, 이전 반복(iteration)으로부터의 심볼 추정치, 및 상기 이전 반복으로부터의 입력 자기상관 매트릭스 추정치(autocorrelation matrix estimate)를 포함하는, 반복 입력들(iteration inputs)을 수신하는 단계;
상기 반복 입력들로부터, 상기 수신 심볼들의 스트림의 위너 추정치(Wiener estimate)를 계산하는 단계;
상기 위너 추정치를, 2차원 심플렉틱(symplectic) 푸리에 변환을 이용하여 2차원 지연-도플러 그리드에서 심볼 추정치들로 변환하는 단계;
상기 2차원 지연-도플러 그리드에서 상기 심볼 추정치들의 우도들(likelihoods)을 추정하는 단계; 및
상기 우도들로부터 데이터 비트들의 추정치들을 생성하는 단계를 포함하는, 무선 통신 방법. - 제1항에 있어서,
상기 추정치들을 생성하는 단계는,
상기 우도들을 디-인터리빙하는 단계; 및
오류 정정(error correction)을 수행하는 단계를 포함하는, 무선 통신 방법. - 제1항에 있어서,
다음 반복(next iteration)을 위한 입력 자기상관 매트릭스 추정치(an input autocorrelation matrix estimate) 및 심볼 추정치를 생성함으로써 피드백 방향에서의 처리를 행하는 단계를 더 포함하는, 무선 통신 방법. - 제3항에 있어서, 상기 피드백 방향에서의 상기 처리를 행하는 단계는,
중간(intermediate) 심볼 추정치들 및 중간(intermediate) 자기상관 추정치를 야기하는, 상기 우도들을 사용한 소프트 심볼 매핑을 수행하는 단계; 및
상기 2차원 심플렉틱 푸리에 변환의 역함수(inverse)를 이용하여, 상기 중간 심볼 추정치들 및 상기 중간 자기상관 추정치를 변환함으로써, 상기 심볼 추정치 및 상기 입력 자기상관 매트릭스 추정치를 생성하는 단계
를 포함하는, 무선 통신 방법. - 제1항에 있어서,
상기 2차원 심플렉틱 푸리에 변환은 심플렉틱 고속 푸리에 변환(SFFT)인, 무선 통신 방법. - 제1항에 있어서,
상기 위너 추정치를 계산하는 단계는,
상기 수신 신호로부터 소거된(erased) 시간-주파수 자원 엘리먼트들에 관한 정보를 수신하는 단계; 및
피드백 방향에서 이전(prior) 심볼 추정치들을, 상기 위너 추정치를 계산하는 단계의 출력들로서 이용하는 단계를 포함하는, 무선 통신 방법. - 반복적 2차원 등화를 수행함으로써, 수신 신호로부터 정보 비트들을 복원하는 무선 통신 방법으로서,
반복적 등화기에서, 상기 수신 신호가 수신된 무선 채널의 2차원 추정치, 수신 심볼들의 스트림, 이전 반복으로부터의 심볼 추정치, 및 상기 이전 반복으로부터의 입력 자기상관 매트릭스 추정치를 포함하는, 반복 입력들을 수신하는 단계;
상기 반복 입력들로부터, 상기 수신 심볼들의 스트림의 위너 추정치를 계산하는 단계;
상기 위너 추정치를, 2차원 심플렉틱 푸리에 변환을 이용하여 2차원 지연-도플러 그리드에서 심볼 추정치들로 변환하는 단계; 및
다음 반복(next iteration)을 위한 입력 자기상관 매트릭스 추정치 및 심볼 추정치를 생성함으로써 피드백 방향에서의 처리를 행하는 단계
를 포함하는, 무선 통신 방법. - 제7항에 있어서,
상기 2차원 지연-도플러 그리드에서 상기 심볼 추정치들의 우도들을 추정하는 단계; 및
상기 우도들로부터 데이터 추정치들을 생성하는 단계
를 더 포함하는, 무선 통신 방법 - 제8항에 있어서,
상기 데이터 추정치들을 생성하는 단계는,
상기 우도들을 디-인터리빙하는 단계; 및
오류 정정을 수행하는 단계를 포함하는, 무선 통신 방법. - 제9항에 있어서,
상기 피드백 방향에서의 상기 처리를 행하는 단계는,
중간 심볼 추정치들 및 중간 자기상관 추정치를 야기하는, 상기 우도들을 사용한 소프트 심볼 매핑을 수행하는 단계; 및
상기 2차원 심플렉틱 푸리에 변환의 역함수를 이용하여, 상기 중간 심볼 추정치들 및 상기 중간 자기상관 추정치를 변환함으로써, 상기 심볼 추정치 및 상기 입력 자기상관 매트릭스 추정치를 생성하는 단계
를 포함하는, 무선 통신 방법. - 제7항에 있어서,
상기 2차원 심플렉틱 푸리에 변환은 심플렉틱 고속 푸리에 변환(SFFT)인, 무선 통신 방법. - 제7항에 있어서,
상기 위너 추정치를 계산하는 단계는,
상기 수신 신호로부터 소거된 시간-주파수 자원 엘리먼트들에 관한 정보를 수신하는 단계; 및
피드백 방향에서 이전(prior) 심볼 추정치들을, 상기 위너 추정치를 계산하는 단계의 출력들로서 이용하는 단계를 포함하는, 무선 통신 방법. - 컴퓨터 판독가능 저장 매체로서,
상기 컴퓨터 판독가능 저장 매체는 저장된 코드를 포함하고, 상기 코드는 실행될 경우, 프로세서로 하여금, 제1항 내지 제12항 중 어느 한 항의 방법을 구현하게 하는, 컴퓨터 판독가능 저장 매체. - 명령을 저장한 메모리 및 프로세서를 포함하는 무선 통신 장치로서,
상기 명령은, 상기 프로세서에 의해 실행될 때, 상기 프로세서로 하여금 제1항 내지 제12항 중 어느 한 항의 방법을 구현하게 하는, 무선 통신 장치. - 삭제
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PCT/US2017/025578 WO2017173389A1 (en) | 2016-04-01 | 2017-03-31 | Iterative two dimensional equalization of orthogonal time frequency space modulated signals |
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US9071286B2 (en) | 2011-05-26 | 2015-06-30 | Cohere Technologies, Inc. | Modulation and equalization in an orthonormal time-frequency shifting communications system |
US10667148B1 (en) | 2010-05-28 | 2020-05-26 | Cohere Technologies, Inc. | Methods of operating and implementing wireless communications systems |
US11070329B2 (en) | 2015-09-07 | 2021-07-20 | Cohere Technologies, Inc. | Multiple access using orthogonal time frequency space modulation |
US11038733B2 (en) | 2015-11-18 | 2021-06-15 | Cohere Technologies, Inc. | Orthogonal time frequency space modulation techniques |
CN117097594A (zh) | 2016-03-31 | 2023-11-21 | 凝聚技术公司 | 使用正交时间频率空间调制的导频信号的信道获取 |
KR102250054B1 (ko) | 2016-04-01 | 2021-05-07 | 코히어 테크널러지스, 아이엔씨. | Otfs 통신 시스템에서의 tomlinson-harashima 프리코딩 |
WO2018106731A1 (en) | 2016-12-05 | 2018-06-14 | Cohere Technologies | Fixed wireless access using orthogonal time frequency space modulation |
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