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Signal detection method and device based on probability data association

An auxiliary detection and data symbol technology, applied in the direction of preventing/detecting errors through diversity reception, space transmission diversity, diversity/multi-antenna systems, etc., can solve the problems of large processing delay of the system receiving module and insufficient correlation utilization , to achieve good error performance, reduce error propagation, and reduce processing delay

Active Publication Date: 2013-01-09
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

However, in the existing decoding algorithms, the correlation between the transmitted data symbols due to channel coding is usually not fully utilized, and the processing delay of the system receiving module is also relatively large during decoding.

Method used

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  • Signal detection method and device based on probability data association
  • Signal detection method and device based on probability data association
  • Signal detection method and device based on probability data association

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Embodiment Construction

[0024] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

[0025] In order to facilitate the understanding of the present invention, the principle of the present invention is first introduced.

[0026] The usual MIMO system receiving signal model is:

[0027] y=Hx+n, (1)

[0028] where y is length N R The received signal vector, x is length N T The transmitted data symbol vector of , the x elements are taken from the modulation constellation A={a 1 , a 2 , ... a M}, H is of size N R ×N T the channel matrix, where n is of length N R ...

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Abstract

The invention provides a signal detection method based on probability data association (PDA). The method comprises the following steps: arranging a detection sequence of data symbols to be detected, orderly updating the posterior probability of each transmitted data symbol according to the detection sequence, and storing the estimated posterior probability value in a dNT*M matrix, wherein the posterior probability stands for the probability of the m constellation point am taken by the nj transmitted data symbol under the conditions of receiving r, and j=1,2,...,d*NT; and judging the data symbols to be detected according to the posterior probability value in the dNT*M matrix, and outputting the judgment result. The invention also provides a signal detection device based on the PDA.The technical scheme provided by the invention realizes joint detection for multiple adjacent transmitted data symbol vectors, and has better error performance as compared with the traditional PDAMIMO detection algorithm.

Description

technical field [0001] The present invention relates to the field of wireless communication, and in particular, the present invention relates to a method and device for auxiliary detection of signals based on probability data. Background technique [0002] Mobile and broadband have become the development direction of modern communication technology. How to eliminate the influence of co-channel interference, multiple access interference and multipath fading has become the main factor that people consider when improving the performance of wireless mobile communication systems. In recent years, a MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) multi-antenna system has become a research hotspot in the field of mobile communications. [0003] The MIMO multi-antenna system refers to a technology that utilizes multiple transmit antennas and multiple receive antennas for wireless transmission. Its essence is to divide the space communication link into a plural...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04B7/06
Inventor 吕铁军杨少石龚萍
Owner DATANG MOBILE COMM EQUIP CO LTD
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