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Method for realizing signal joint detection based on minimum mean variance linear block balance

A mean square error, linear technology, applied in the field of signal joint detection based on minimum mean square error linear block equalization

Active Publication Date: 2010-12-22
POTEVIO INFORMATION TECH CO LTD +2
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  • Application Information

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Problems solved by technology

In addition, since the existing algorithm uses the two-block row approximation method to perform Cholesky decomposition in the process of joint detection, the dimension of the approximate solution of the R matrix is ​​KN×KN. When using such an R matrix for subsequent equalization The amount of calculation is very large; in addition, when performing sequential detection in step 3, the detection starts from the last one of the KN received symbols, so the time delay between receiving data and detecting the first symbol is also very large

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  • Method for realizing signal joint detection based on minimum mean variance linear block balance
  • Method for realizing signal joint detection based on minimum mean variance linear block balance
  • Method for realizing signal joint detection based on minimum mean variance linear block balance

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[0105] In order to make the objectives, technical means and advantages of the present invention clearer, the following describes specific implementations of the present invention with reference to the accompanying drawings and examples.

[0106] The basic idea of ​​the present invention is: the present invention divides and rearranges the parts corresponding to the first two symbol groups in the transmitted symbol vector, system matrix and noise matrix, and uses the system description after the division and rearrangement to obtain the U matrix, The U matrix is ​​used to equalize the signal components of the subsequent symbol group in the received symbol vector corresponding to each symbol group, and then the symbol group is used as a unit to suppress interference within the group.

[0107] figure 1 It is the overall flow chart of the method for implementing signal joint detection based on the minimum mean square error linear block equalization of the present invention. Such as fi...

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Abstract

The invention discloses a method to realize combined signal detection based on least mean-square error linear block equalization. The method segments the sections in transmitted symbolic vectors, a system matrix and a noise matrix corresponding to the two front symbolic sets, and conducts rearrangement, further uses the system description after segmentation and rearrangement to get a U matrix. The U matrix is used to equalize signal components of latter symbolic sets in the received symbolic vectors corresponding to each symbolic set, to realize interference suppression among the sets; and finally the symbolic set is used as the unit, to conduct signal detection among the sets, and conducts interference suppression among the sets. The method in the invention realizes sub-step interferencesuppression among symbolic sets and within the symbolic sets, greatly decreasing calculation complexity, and efficiently suppressing the interference among the symbolic sets.

Description

technical field [0001] The invention relates to a joint detection technology in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, in particular to a method for realizing signal joint detection based on minimum mean square error linear block equalization. Background technique [0002] In the TD-SCDMA communication system, both inter-symbol interference (ISI) and multi-user interference (MAI) exist, so the matrix dimension describing the TD-SCMA system is very large, and solving this system quickly and accurately is the key to TD-SCDMA in use. A problem that must be solved. Minimum Mean Square Error Linear Block Equalization (MMSE-BLE) is a joint signal detection method often used in TD-SCDMA system. [0003] In a TD-SCDMA system with M transmitting antennas and N receiving antennas, assuming there are K VRU codes, L=W-1, where W is the channel window length, for the mth antenna at the receiving end, its mixed channel matrix for, [0004] ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/707H04B7/02H04B17/00H04B1/7105
Inventor 何磊
Owner POTEVIO INFORMATION TECH CO LTD