公开(公告)号：CA2695206A1

公开(公告)日：2009-03-05

申请号：CA2695206

申请日：2008-08-28

Applicant: QUALCOMM INC

Inventor： VAN ZELST ALBERT ,  WONG BRIAN ,  VAN NEE DIDIER JOHANNES RICHARD ,  JONES IV VINCENT K ,  AWATER GEERT ARNOUT

IPC: H04B7/04 ,  H04L1/06 ,  H04L25/02

Abstract: Systems and methodologies are described that provide low-complexity soft-output detection for MIMO communication systems. Looping can be performed over a set of constellation points per spatial stream to obtain distance metrics for each of a series of transmitted streams, for which values for the other transmitted streams can be estimated using a MIMO channel matrix and a sub-optimal MIMO algorithm. Examples of MIMO algorithms that can be utilized include Per-Stream List Detection (PSLD), Lattice-Reduced Detection (LRD), and a Guided-M Algorithm. Performance can be further improved by pre-processing the MIMO channel matrix and/or by utilizing techniques for Enhanced Metric Usage (EMU).

公开(公告)号：WO2010022119A3

公开(公告)日：2010-10-21

申请号：PCT/US2009054259

申请日：2009-08-19

Applicant: QUALCOMM INC ,  SAMPATH HEMANTH ,  JONES IV VINCENT K

Inventor： SAMPATH HEMANTH ,  JONES IV VINCENT K

IPC: H04L5/00

CPC classification number: H04L5/0023 ,  H04L5/0033 ,  H04L5/0037 ,  H04W88/08

Abstract: An apparatus for wireless communications is disclosed herein that is configured to have a plurality of transceivers arranged to process a plurality of spatial streams, wherein each of the plurality of transceivers is configured to operate asynchronously and simultaneously with other transceivers of the plurality of transceivers.

Abstract translation: 本文公开了一种用于无线通信的设备，其被配置为具有布置成处理多个空间流的多个收发器，其中多个收发器中的每一个被配置为与多个收发器中的其他收发器异步并同时操作。

公开(公告)号：WO2010045033A3

公开(公告)日：2010-09-16

申请号：PCT/US2009059147

申请日：2009-09-30

Applicant: QUALCOMM INC ,  PARK JONG HYEON ,  BREHLER MATTHIAS ,  BANISTER BRIAN CLARKE ,  VAN ZELST ALLERT ,  CHANG TAE RYUN ,  JONES IV VINCENT K ,  KIM JE WOO

Inventor： PARK JONG HYEON ,  BREHLER MATTHIAS ,  BANISTER BRIAN CLARKE ,  VAN ZELST ALLERT ,  CHANG TAE RYUN ,  JONES IV VINCENT K ,  KIM JE WOO

IPC: H04L25/03

CPC classification number: H04L25/03171 ,  H04L5/0023 ,  H04L25/03197 ,  H04L25/03331 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: Certain embodiments of the present disclosure provide techniques for approximate computation of l 2 norms as a part of the maximum likelihood (ML) detection: tri-maxmin, maxsum and sortsum algorithms. The proposed approximation schemes show better accuracy than conventional approximation schemes - the abssum and maxmin algorithms, while the computational complexity is very similar. The error rate performance of the ML detection that utilizes proposed norm-approximation techniques are very close to the reference ML detection with exact calculation of l 2 norms, while the computational complexity is significantly smaller.

Abstract translation: 本公开的某些实施例提供了用于近似计算l 2个范数作为最大似然（ML）检测的一部分的技术：tri-maxmin，maxsum和sortsum算法。 所提出的近似方案显示比传统近似方案（abssum和maxmin算法）更好的准确性，而计算复杂度非常相似。 使用所提出的范数逼近技术的ML检测的误差率性能非常接近参考ML检测，精确计算l 2个范数，而计算复杂度显着更小。

公开(公告)号：WO2010033437A3

公开(公告)日：2010-09-16

申请号：PCT/US2009056759

申请日：2009-09-12

Applicant: QUALCOMM INC ,  PARK JONG HYEON ,  VAN ZELST ALLERT ,  BANISTER BRIAN CLARKE ,  KIM JE WOO ,  BREHLER MATTHIAS ,  JONES IV VINCENT K

Inventor： PARK JONG HYEON ,  VAN ZELST ALLERT ,  BANISTER BRIAN CLARKE ,  KIM JE WOO ,  BREHLER MATTHIAS ,  JONES IV VINCENT K

IPC: H04L25/03

CPC classification number: H04L25/03171 ,  H04L25/03197 ,  H04L25/03331 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: A "post-squaring" detection algorithm, and related devices, that may reduce the complexity of maximum likelihood detection (MLD) schemes while preserving their performance is provided. Rather than search for optimum metrics (such as minimum distance metrics) based on squared norm values, a search may be based on un-squared norm metrics, and the squaring may be postponed, for example, until subsequent log-likelihood ratio (LLR) computation. For certain embodiments, approximations of un-squared norm values may significantly reduce computation complexity.

Abstract translation: 提供了可以降低最大似然检测（MLD）方案的复杂性同时保持其性能的“后置”检测算法和相关设备。 搜索可以基于平方范数，而不是基于平方范数搜索最佳度量（例如最小距离度量），并且可以延迟平方，例如直到后续的对数似然比（LLR） 计算。 对于某些实施例，非平方范数值的近似可以显着降低计算复杂度。