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Hardware simplification of SIC-MIMO decoding by use of a single hardware element with channel and noise adaptation for interference cancelled streams

A decoder, channel matrix technology, applied in the direction of forward error control, prevention/detection of errors through diversity reception, electrical components, etc., which can solve the problems of computational complexity, implementation cost, high processing delay, etc.

Active Publication Date: 2012-05-30
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the computational complexity, implementation cost, and processing latency of both schemes may be prohibitive

Method used

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  • Hardware simplification of SIC-MIMO decoding by use of a single hardware element with channel and noise adaptation for interference cancelled streams
  • Hardware simplification of SIC-MIMO decoding by use of a single hardware element with channel and noise adaptation for interference cancelled streams
  • Hardware simplification of SIC-MIMO decoding by use of a single hardware element with channel and noise adaptation for interference cancelled streams

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Embodiment Construction

[0019] Various aspects of the present application are described more fully hereinafter with reference to the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this application. Rather, these aspects are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Based on the teachings herein, those skilled in the art should understand that the scope of the present application is intended to cover any aspect of the application disclosed herein, regardless of whether the aspect is implemented independently or in combination with any other aspect of the application. realized. For example, an apparatus or method may be implemented using any number of the aspects presented herein. In addition, the scope of the present application is intended to encompass an app...

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Abstract

The present invention relates to a method and an apparatus for simplified serial interference cancellation in multiple- input multiple-output (MIMO) and non-MIMO wireless systems by using a single hardware element for multiple interference cancelled streams, comprising: receiving at least one data stream, wherein each data stream from the at least one data stream was transmitted over a wireless channel; performing inner decoding of the at least one data stream using a first set of a priori loglikelihood ratios (LLRs) and a channel matrix to obtain a first set of extrinsic LLRs of transmitted bits of the at least one data stream; performing outer decoding of the first set of extrinsic LLRs to obtain a second set of a posteriori LLRs and decoded bits of the at least one data stream; cancelling interference of a data stream from the decoded bits and from the second set of a posteriori LLRs of at least one data stream to obtain a signal with cancelled interference, if two or more independant data streams of the at least one data stream were simultaneously transmitted from multiple antennas.

Description

technical field [0001] Certain aspects of the present application relate generally to wireless communications, and more particularly to a method and apparatus for simplified decoding in multiple-input multiple-output (MIMO) systems and non-MIMO systems. Background technique [0002] MIMO receivers using interference cancellation and maximum a posteriori decoding include hardware units for collecting log-likelihood ratio (LLR) information of the transmitted bits, such as minimum mean square error (MMSE) equalization using LLR look-up tables (LUTs) , or the Joint LLR (JLLR) detection module and any of its simplified versions, such as maximal-logmaximum posterior (MLM) decoding. In the exemplary case of two simultaneously transmitted independent data streams, an MMSE equalizer may typically be used with adjusted channel weights to decode one data stream, which may follow interference cancellation of the other data stream. [0003] In practice, two different decoding solutions ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00H04B1/7107
CPCH04L1/005H04B1/7107H04L1/0631H04L2025/03426H04L2025/03414H04L2025/0342H04L1/06H04L1/0052
Inventor A·A·萨尔韦卡J·唐J·H·朴S·卡尔利
Owner QUALCOMM INC