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Method for detecting V-BLAST in MIMO system

A technology of V-BLAST and detection method, applied in multi-frequency code system, diversity/multi-antenna system, prevention/detection of errors through diversity reception, etc., can solve problems such as increasing system complexity and increasing system real-time performance

Inactive Publication Date: 2013-02-27
ZTE CORP
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Problems solved by technology

This method combines multiple retransmission channel information to determine the antenna detection order of the current transmission, making the detection order better than traditional MIMO detection, which is beneficial to reduce the possibility of error propagation in serial interference cancellation, but also, the feedback will Increase the complexity of the system, and introduce a delay, which increases the real-time performance of the system

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  • Method for detecting V-BLAST in MIMO system
  • Method for detecting V-BLAST in MIMO system
  • Method for detecting V-BLAST in MIMO system

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Embodiment Construction

[0038] Below, combined with Figure 1~3 The V-BLAST detection method in the MIMO system of the present invention is described in detail.

[0039] The core idea of ​​the present invention is: based on the V-BLAST symbol detection method, the layered structure of V-BLAST is utilized, and the symbols of each layer are detected layer by layer by using interference suppression-interference cancellation technology. Since the detection order of symbols of each layer on different antennas at the receiving end is the key to affecting system performance, the system performance is improved by improving the ordering criteria of detected symbols.

[0040] Such as figure 1 Shown is a schematic diagram of the V-BLAST system. At the transmitting end, the modulated symbol stream is divided into M paths independent of each other, and sent to the corresponding antennas for transmission, and the transmitted signal vector a=(a 1 ,a 2 ,...a M ) T , where M is the number of transmitting antenn...

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Abstract

The invention provides a method for checking V-BLAST in a multi-input and multi-output system, wherein the method comprises introducing maximum posterior probability criterions, checking according to an order from big to small of the probability of each layer of symbols, firstly, removing signals which are checked as interferences from the signals which are received, and then checking the signals of the maximum layer in each residual layer of symbols until all signals are checked out through analogy in turn. The complexity is lowered and the performance is increased according to the method for checking the V-BLAST in the multi-input and multi-output system.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to a Vertical Bell Laboratories Layered Space-Time (V-BLAST) detection method in a multiple-input multiple-output system. Background technique [0002] Wireless communication is restricted by many factors such as spectrum resources, transmission power and multipath fading, which are directly related to the spectrum utilization of the capacity of the wireless communication system. Studies have shown that in wireless communication systems, systems with multiple antennas at the transmitting end or receiving end provide higher data transmission rates than traditional single-antenna systems. Information theory technology proves this Multiple-Input Multiple-Output (MIMO) The channel capacity of the technology grows linearly with the smaller number of transmit and receive antennas. In order to fully utilize the system capacity of MIMO, various spatial-multiplex (Spatial-Multiplex, SM)...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/02H04B7/02H04L27/26
Inventor 张娟刘巧艳李玉洁赵路
Owner ZTE CORP