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Methods and devices for symbols detection in multi antenna systems

A signal and decoder technology, applied in the field of decoding data signals, can solve problems such as inapplicable sub-block decoding algorithms, affecting processing complexity and computational complexity, and achieve the effects of reducing computational complexity, reducing parallelization, and reducing decoding errors

Active Publication Date: 2017-10-20
INST MINES TELECOM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing preprocessing techniques require computational complexity that can affect the overall processing complexity
Also, this preprocessing method may not be suitable for subblock decoding algorithms

Method used

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  • Methods and devices for symbols detection in multi antenna systems
  • Methods and devices for symbols detection in multi antenna systems
  • Methods and devices for symbols detection in multi antenna systems

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Embodiment Construction

[0071] Embodiments of the present invention provide, alone or in combination, methods, devices and computer program products for decoding vectors of information symbols received over a transmission channel in a communication system with optimized computational complexity. A transmission channel is represented by a channel matrix comprising column vectors. Embodiments of the invention are based on transforming the channel matrix into a matrix according to a selection criterion, enabling a reduction in the complexity of the decoding algorithm implemented to determine at least one estimate of the information symbol vector.

[0072] Methods, devices and computer program products according to various embodiments of the present invention may be implemented in different types of systems. In particular, methods, devices and computer program products according to various embodiments of the present invention may be implemented in a communication system to determine estimates of informat...

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Abstract

Embodiments of the invention provide a decoder for decoding a signal received through a transmission channel in a communication system, said signal comprising a vector of information symbols, said transmission channel being represented by a channel matrix comprising column vectors, said information symbols carrying information bits, wherein the decoder comprises: - a transformation unit (401) configured to determine a set of auxiliary channel matrices, each auxiliary channel matrix being determined by performing a linear combination of at least one of the column vectors of said channel matrix; - a decomposition unit (407) configured to determine a decomposition of each auxiliary channel matrix into an upper triangular matrix and an orthogonal matrix; - a matrix selection unit (409) configured to select at least one auxiliary channel matrix among said set of auxiliary channel matrices depending on a selection criterion related to the components of said upper triangular matrices. The decoder being configured to determine an auxiliary signal by multiplying the transpose of the orthogonal matrix corresponding to said selected auxiliary channel matrix by said received signal, the decoder being configured to determine at least one estimate of said vector of information symbols from said auxiliary signal and from the upper triangular matrix corresponding to said selected auxiliary channel matrix by applying a decoding algorithm.

Description

technical field [0001] The present invention relates generally to digital communications, and more particularly to methods and apparatus for decoding data signals. Background technique [0002] Multipath propagation is the propagation phenomenon in which a signal takes two or more paths to reach a receiver device or device. Multipath propagation can also lead to interference between different signals traveling through the same communication medium or between different components of the same signal. This phenomenon can occur eg in wired communication links due to signal reflections eg caused by impedance mismatches. In digital radio communications, multipath propagation can occur due to signal reflections from the atmosphere and terrestrial objects. In optical communication systems, dispersion and multiple reflections in the fiber propagation environment may cause multipath propagation. [0003] Destructive interference caused by multipath propagation, mainly inter-symbol ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L25/03H04B7/0413
CPCH04B7/0413H04L1/0052H04L1/0054H04L1/0057H04L25/03006H04L1/0631H04L25/03891H04L2025/03426H04L25/0256H04L25/03267H04L25/03286H04L25/0242H04L25/03292H04L27/06
Inventor A·梅杰里M-A·赫西巴G·雷卡亚本-奥斯曼
Owner INST MINES TELECOM
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