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Method for detecting iteration of multiple input multiple output (MIMO) system, system thereof and device thereof

A multiple-input, multiple-output, iterative detection technology, applied in the field of iterative detection of multiple-input, multiple-output systems, can solve the problems of little performance gain, high complexity, and no consideration of MIMO detectors, etc.

Inactive Publication Date: 2009-11-18
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, this scheme does not consider that the MIMO detector can better cancel the interference between multiple antennas, so in fact, the subsequent iteration stage still obtains less performance gain with higher complexity

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  • Method for detecting iteration of multiple input multiple output (MIMO) system, system thereof and device thereof
  • Method for detecting iteration of multiple input multiple output (MIMO) system, system thereof and device thereof
  • Method for detecting iteration of multiple input multiple output (MIMO) system, system thereof and device thereof

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0041] see figure 1 As shown, the MIMO system transmitter includes: a signal source generator 101 , a channel encoder 102 , an interleaver 103 , a modulator 104 , a serial-to-parallel converter 105 and a transmitting antenna 106 .

[0042] The information source {a generated by the information source generator 101 i}After encoding by channel encoder 102, bit interleaving by interleaver 103 and modulation by modulator 104, the symbol sequence {s i}, sequence of symbols {s i} is divided into multiple signal streams through serial-to-parallel converter 105 serial-to-parallel conversion [s 1 ,s 2 ,...,s Nt ], which is emitted by the transmitting antenna 106.

[0043] see figure 2 As shown, the MIMO system receiver inc...

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Abstract

The invention discloses a method for detecting the iteration of a multiple input multiple output (MIMO) system, a system thereof and a device thereof. The method comprises the following steps of: when initializing an iteration process, adopting a soft in soft out parallel soft interference cancellation MMSESIC MIMO detecting method with a signal which is received by a receiver and a channel fading matrix which is estimated by the channel; when continuing the iteration process, taking the sum of residual interference and noise which are deleted by the parallel soft interference as an equivalent noise with the signal which is received by the receiver, bit priori information which is outputted by a channel encoder in the former iteration and a channel fading matrix which is estimated by the channel, wherein, the each component of the equivalent noise is similar to be mutually independent gaussian random variables, and executing a soft in soft out MMSESIC MIMO detecting computation under the model; and hard deciding code bit posterior information which is outputted by the soft in soft out channel encoder, executing a CRC check, outputting the hard decision result of the information source code bit posterior information, and taking the result as the final result of interative detection.

Description

technical field [0001] The present invention relates to the technical field of wireless communication systems, in particular to a multiple-input multiple-output system iterative detection method, system and equipment. Background technique [0002] With the sharp increase in the number of wireless communication users and the rapid development of broadband multimedia services, people have put forward higher and higher requirements for the transmission rate and performance of wireless communication systems. Today, as spectrum resources become increasingly scarce, multiple input multiple output (MIMO: Multiple Input Multiple Output) technology has attracted much attention because it can greatly improve the transmission quality and spectrum efficiency of wireless communication systems. The current research shows that for MIMO systems, iterative receiver is an effective way to approach the capacity of MIMO channels. In an iterative receiver, the MIMO detector should achieve soft ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06H04L25/02H04L25/03
Inventor 陶小峰崔琪楣韩娟许晓东张平
Owner BEIJING UNIV OF POSTS & TELECOMM
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