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Reception method for multi-antenna communication system

A communication system and receiving method technology, applied in diversity/multi-antenna systems, space transmit diversity, etc., can solve the problem of hardware resources occupied by K-Best MIMO detectors

Inactive Publication Date: 2015-05-20
BEIJING UNIV OF TECH
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Problems solved by technology

[0012] It can be seen that the sorting selection unit of the traditional structure K-Best MIMO detector also takes up a lot of hardware resources

Method used

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  • Reception method for multi-antenna communication system
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  • Reception method for multi-antenna communication system

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Embodiment Construction

[0034] In this detector, the processing steps of the received signal are as follows Figure 4 ,Described as follows:

[0035] In the first step, the channel matrix Carry out QR decomposition to obtain unitary matrix Q and upper triangular matrix R.

[0036] In the second step, the received signal is equalized using the unitary matrix Q.

[0037] The third step is to use R to calculate the Euclidean distance increment to generate a candidate generation module, which can reduce the hardware resource occupation of the Euclidean distance increment calculation.

[0038]In the fourth step, in the first K-Best module, first calculate the Euclidean distance increment of the (2N, 2N-1)th layer, and after sorting the Euclidean distance increments, only the best L (L 2N-1 (x).

[0039] In the fifth step, other K-Best modules first calculate the Euclidean distance increments from the 2N-2 to the first layer, and then add each of the K Euclidean distance increments to the K cumulative...

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Abstract

The invention discloses a reception method for a multi-antenna communication system and belongs to the field of the transmission of radio signals. The reception method is characterized by comprising the following steps of: ordering the Euclidean distance increments of only the top two layers of signals in a search tree of a detection algorithm so that only K sub-nodes with smaller Euclidean distance increments are kept in each two layers; then calculating the accumulated Euclidean distances of the (2N-1) layer in the top two layers, wherein N represents the number of the antenna; and sequentially selecting the (2N-2) layer and the (2N-3) layer from the (2N-2) layer, calculating the Euclidean distance increment of each layer and adding the calculated Euclidean distance increments with K accumulated Euclidean distances in the first period to obtain the accumulated Euclidean distance of the (2N-3) layer, and performing the calculation in the same manner till the accumulated Euclidean distance of the first layer is calculated. According to the invention, two adjacent layers of signals can be simultaneously treated so that the ordering, selecting, calculating and searching times are reduced, the system time relay and the calculation complexity are decreased, and lots of hardware resources are saved.

Description

technical field [0001] The invention belongs to the field of wireless information transmission, in particular to systems and standards such as wireless local area network, broadband wireless access, and mobile communication using multi-antenna technology. Background technique [0002] Multiple-input multiple-output (MIMO) technology uses multiple antennas at both the signal transmitting end and the receiving end, and simultaneously transmits multiple data streams in the same frequency band through spatial multiplexing, which can provide higher spectral efficiency than single-antenna system (SISO) , has been applied to 3GPP LTE, LTE-Advanced, IEEE802.11n and other new generation broadband wireless communication standards. The best hard-decision detection method for MIMO wireless systems is the maximum likelihood (ML) detection method. The complexity of its direct implementation increases exponentially with the increase of the number of antennas and the modulation order, so th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08
Inventor 黎海涛刘飞朱静
Owner BEIJING UNIV OF TECH