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Method for equalizing ordered block decision feedback in TD-SCDMA

A TD-SCDMA, decision feedback equalization technology, applied in the direction of shaping network, electrical components, transmission system, etc. in transmitter/receiver, can solve the problem of further technical development of decision gain improvement, etc.

Inactive Publication Date: 2013-05-01
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no further technical development for the improvement of the decision gain in the prior art, so it still needs to be improved and developed.

Method used

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  • Method for equalizing ordered block decision feedback in TD-SCDMA
  • Method for equalizing ordered block decision feedback in TD-SCDMA
  • Method for equalizing ordered block decision feedback in TD-SCDMA

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Embodiment Construction

[0075] Various preferred embodiments of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0076] The block judgment feedback equalization method of sorting in TD-SCDMA of the present invention is when the spreading factors of each user are different, first sorts the users according to the size of the spreading factor, and ranks the CCIR of the user with a large spreading factor in the back and Reflected in matrix A, then general block decision feedback equalization (ZF-BDFE and MMSE-BDFE) is performed. Generally speaking, the decision error of symbols with large spreading factors is smaller. Therefore, when the spreading factors of different users are different, it is possible to obtain gains by sorting the decision symbols. Other processing procedures are consistent with the prior art and will not be repeated here. When the spreading factors of each user are the same, which symbols have the smallest decision error i...

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Abstract

The invention discloses a method for equalizing ordered block decision feedback in TD-SCDMA and comprises the following steps: users are arranged by sequence according to the magnitude of the spreading factors when the spreading factors of the users are different, and the combined channel impulse responses (CCIR) of the users with large spreading factors are arranged behind and are reflected in matrix A to conduct block decision feedback equalization, zero forcing block decision feedback equalization (ZF-BDFE) and minimum mean square block error block decision feedback equalization (MMSE-BDFE). Through arranging the users by sequence according to the magnitude of the spreading factors, since the CCIR of the users with large spreading factors are arranged behind and are reflected in the matrix A to conduct common block decision feedback equalization (ZF-BDRE and MMSE-BDFE), the decision gain is improved.

Description

technical field [0001] The invention belongs to an optimized realization method of joint detection technology in TD-SCDMA, and in particular relates to a channel equalization in TD-SCDMA communication and a multi-user detection processing method in CDMA system. Background technique [0002] In the prior art, the joint detection technology is mainly aimed at block transmission (also called burst mode) systems such as TD-SCDMA. The block transmission system has its unique matrix form equalization method. For the TD-SCDMA system, the matrix form equalization method and data detection are combined, which is the so-called joint detection algorithm. The joint detection technology can not only overcome the near-far effect, but also alleviate the inter-symbol interference (ISI, Inter Symbol Interference) and multiple-access interference (MAI, Multiple-access interference) generated by the multipath channel. [0003] CDMA system can be divided into asynchronous CDMA and synchronous ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7105H04L25/03
Inventor 周化雨
Owner TCL CORPORATION