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Soft de-mapping method and device and communication system thereof

A communication system and demapping technology, which is applied in the field of soft demapping methods and devices, and can solve the problems that the receiver cannot receive signal vectors smoothly and the influence of signal vectors, etc.

Inactive Publication Date: 2011-11-09
IND TECH RES INST
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In order to avoid the signal vector being excessively affected by the wireless channel, resulting in the receiver being unable to receive the signal vector smoothly, the current multiple-input multiple-output system is widely used

Method used

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  • Soft de-mapping method and device and communication system thereof
  • Soft de-mapping method and device and communication system thereof
  • Soft de-mapping method and device and communication system thereof

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Embodiment Construction

[0091] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following describes the soft demapping method and device of the present invention and its communication system in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0092] The embodiment of the present invention provides a soft demapping method for calculating the minimum Euclidean distance between all signal vectors corresponding to some bits that are not calculated during signal detection and the received signal, so as to establish a complete The bit vector minimum distance corresponding table, and the bit vector minimum distance corresponding table to obtain the log likelihood ratio corresponding to each bit. This soft demapping method can be combined with different types of signal ...

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Abstract

The invention discloses a soft de-mapping method and device and a communication system thereof. The method comprises the following steps of: calculating a minimum Euclidean distance between all probably transmitted signal vectors corresponding to a part of bits which are not obtained and received signals during signal detection by using channel state information and a modulating coefficient to accordingly establish a complete bit-vector-minimum distance mapping table; and obtaining a logarithm likehood ratio corresponding to every bit through the bit-vector-minimum distance mapping table. The soft de-mapping method can be matched with the signal detection modes of different types to complete a task for decoding a received signal vector into a bit vector, wherein the signal detection modes can be a maximum likehood detection mode and a spherical decoding mode.

Description

Technical field [0001] The present invention relates to a communication system, in particular to a soft demapping method and device for a receiver of the communication system. Background technique [0002] In recent years, wireless or wired communication technologies have developed rapidly, and people can use communication devices with communication functions to access the Internet or make calls with others anytime and anywhere. In order to prevent the signal vector from being excessively affected by the wireless channel, resulting in the receiver being unable to receive the signal vector smoothly, multiple input and multiple output systems are currently widely used. When the receiver performs signal detection, it usually uses Sphere Decoding (SD) or Maximum Likelihood Detection (MLD). [0003] The most likely detection will find a signal vector that is the closest to the received signal vector from the set of all possible signal vectors. If misunderstanding is not considered, the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L25/06H04L27/38
Inventor 江晓岚丁邦安陈治宇
Owner IND TECH RES INST