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Lattice-based protocol-assisted channel preprocessing method and device for mimo detection

A lattice reduction and preprocessing technology, applied in the field of channel preprocessing assisted by lattice reduction, can solve the problems of complex sorting, unsuitable for high data throughput and low latency MIMO communication systems, performance loss, etc. The effect of saving the number of matrix exchanges and low complexity

Active Publication Date: 2022-05-17
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

However, due to the complex sorting, this algorithm is not suitable for MIMO communication systems with high data throughput and low latency
Moreover, in an 8x8 MIMO communication system, these algorithms have a non-negligible performance loss compared to the optimal detection algorithm

Method used

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  • Lattice-based protocol-assisted channel preprocessing method and device for mimo detection

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Embodiment Construction

[0044] figure 1 For the overall algorithm flow chart of the channel preprocessing method oriented to the lattice-based statute aided by MIMO detection proposed by the present invention, its steps mainly include

[0045] 101) Calculate the gram matrix A according to the input channel matrix H and noise average energy:

[0046] An Nr×Nt multiple-input multiple-output (MIMO) communication system has Nr transmitting antennas at the transmitting end and Nt receiving antennas at the receiving end. The system model can be expressed as:

[0047] y=Hx+n

[0048] Among them, H is a channel matrix with a size of Nr×Nt, y is a receiving vector with a dimension of Nr, and n is a Gaussian additive white noise with a dimension of Nr that obeys independent and identical distribution, its mean value is 0, and its variance is σ 2 ; x is a receiving vector whose dimension is Nt; the Gram matrix A can be expressed as:

[0049]

[0050] where I is the identity matrix.

[0051] 102) cholesky...

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Abstract

A channel preprocessing method and device oriented to MIMO detection aided by lattice-based reduction, comprising the following steps: step 1, performing cholesky decomposition and lattice-based reduction transformation on the channel matrix; step 2, using a breadth-first K-best tree search method , search according to a certain expansion strategy and child node selection strategy. In step 1, the present invention reduces complexity and delay and improves parallelism of the algorithm by removing specific inactive sub-modules and breaking the dependency relationship between data. The invention can solve the problems of high delay, low data throughput rate, hard hardware implementation and the like of traditional detection devices while having nearly optimal detection performance.

Description

technical field [0001] The present invention belongs to a Multiple Input Multiple Output system (Multiple Input Multiple Output, hereinafter referred to as MIMO system), in particular a lattice-based protocol-assisted channel preprocessing method and device for MIMO detection. Background technique [0002] With the rapid development of bandwidth-limited wireless communication systems, MIMO systems are proposed by researchers as a solution for high transmission rate applications. The MIMO system can increase the data transmission rate without increasing additional bandwidth and transmit power. Therefore, it is widely used in various modern communication standards, such as 802.11ac and the wireless local area network technical requirements protocol (Enhanced Ultra High Throughput, EUHT) with high frequency utilization and high data throughput. Moreover, in the next decade, MIMO technology with larger antenna scale will still be one of the cores of 5G communication standards. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/0456H04L1/00
CPCH04B7/0413H04B7/0456H04L1/0054
Inventor 梁卓君贺光辉
Owner SHANGHAI JIAOTONG UNIV
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