A method for multi-ary FSK non-coherent detection in mimo communication to realize space division multiplexing

A non-coherent detection and space division multiplexing technology, applied in the field of communication, can solve the problems of high signal SNR requirements, no use of channel information, affecting multi-antenna signal demodulation, etc., to improve communication capacity and reduce high-precision phase synchronization. requirements, the effect of reducing the need for phase change tracking

Active Publication Date: 2021-07-20
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

The disadvantages of the above non-coherent MIMO communication methods: First, channel information is not used, and the signal SNR requirements are high, and the constellation, codebook, space-time code, and algorithm performance are severely limited by the correlation characteristics of MIMO channels; secondly, fast fading The random phase variation caused by the

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  • A method for multi-ary FSK non-coherent detection in mimo communication to realize space division multiplexing
  • A method for multi-ary FSK non-coherent detection in mimo communication to realize space division multiplexing
  • A method for multi-ary FSK non-coherent detection in mimo communication to realize space division multiplexing

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[0044] A method for realizing space division multiplexing by multi-ary FSK non-coherent detection in MIMO communication, comprising the following steps:

[0045] 1) Modulate the signal and send it: V-BLAST-MIMO system composed of multiple transmit antennas and multiple receive antennas, such as figure 1 As shown, the transmitter uses MFSK modulated by M-ary orthogonal signals to modulate independent pilot sequences X on multiple antennas. 0 (t) and data stream Xw(t), pilot sequence X 0 (t) using a known random multi-ary code;

[0046] 2) Through the channel: For a MIMO system with N sending and L receiving, the wireless channel fading matrix is:

[0047]

[0048] where A kn Indicates the channel fading amplitude coefficient from the nth transmitting antenna to the kth receiving antenna, n=1,...N, k=1,...L, is the channel phase offset from the nth transmit antenna to the kth receive antenna, It is the angle offset caused by Doppler, and the received signal can be expr...

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Abstract

The invention discloses a method for realizing space division multiplexing by multi-ary FSK non-coherent detection in MIMO communication. MFSK energy detection; 4) system equivalent processing; 5) channel estimation; 6) signal demodulation. This method is suitable for high-capacity wireless communication in fast-fading and phase-following environments, and it is applied to multi-antenna space division multiplexing in scattered communication environments, and can improve communication capacity under the condition of ensuring communication quality.

Description

technical field [0001] The invention relates to communication technology, in particular to a method for realizing space division multiplexing by multi-ary FSK non-coherent detection in MIMO communication. Background technique [0002] Due to its insensitivity to phase changes caused by wireless fading channels, non-coherent communication is suitable for some communication environments with fast phase changes or strong phase randomness and difficult to estimate, such as FSK (frequency shift keying signal), ASK (amplitude keying Signal), LFM (Linear Frequency Modulation Signal), DPSK (Differential Phase Shift Keying Signal) and other signals are generally suitable for non-coherent demodulation methods, and are widely used in scattered communications such as VHF, UHF, and other communication applications in fading and interference environments. [0003] Multiple transmitting antennas and multiple receiving antennas, that is, MIMO wireless communication technology is the key tec...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/148H04L27/12H04B7/0413H04B7/06H04B7/08H04L25/02
CPCH04B7/0413H04B7/0697H04B7/08H04L25/0224H04L25/024H04L27/12H04L27/148
Inventor 郑霖汪震杨超仇洪冰邓小芳李晓记王俊义李燕龙符杰林
Owner GUILIN UNIV OF ELECTRONIC TECH
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