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Method for realizing space division multiplexing by multi-system FSK incoherent detection in MIMO communication

A non-coherent detection and space division multiplexing technology, applied in the field of communication, can solve problems such as limited algorithm performance, MIMO channel correlation characteristics, high signal SNR requirements, and affecting multi-antenna signal demodulation, so as to reduce the need for phase change tracking , reduce estimation complexity, and avoid the effect of coherent detection requirements

Active Publication Date: 2019-08-09
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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  • Method for realizing space division multiplexing by multi-system FSK incoherent detection in MIMO communication
  • Method for realizing space division multiplexing by multi-system FSK incoherent detection in MIMO communication
  • Method for realizing space division multiplexing by multi-system FSK incoherent detection in MIMO communication

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Embodiment

[0046] A method for realizing space division multiplexing by multi-ary FSK non-coherent detection in MIMO communication, comprising the following steps:

[0047] 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 X w (t), pilot sequence X0 (t) using a known random multi-ary code;

[0048] 2) Through the channel: For a MIMO system with N sending and M receiving, the wireless channel fading matrix is:

[0049]

[0050] in It is the angle offset caused by Doppler, and the received signal can be expressed as Y=HX+N 0 , where Y represents the received signal matrix with a dimension of L×T, and X represents the transmitted signal matrix with a dimension of N×T, N 0 Represents the noise matrix;

[0051] 3) MFSK energy detectio...

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Abstract

The invention discloses a method for realizing space division multiplexing by multi-system FSK (Frequency Shift Keying) incoherent detection in MIMO (Multiple Input Multiple Output) communication, which is characterized by comprising the following steps: 1) modulating and sending a signal; 2) passing through the channel; 3) independently carrying out MFSK energy detection on each antenna; 4) realizing system equivalent processing; 5) realizing channel estimation; and 6) realizing signal demodulation. The method is suitable for high-capacity wireless communication in a fast fading and phase following environment, is applied to the multi-antenna space division multiplexing of a scattering communication environment, and can improve the communication capacity under the condition that the communication quality is guaranteed.

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 Applications(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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