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Fast determination method for multi-antenna space-time block coding recognition threshold

A technology of space-time block codes and determination methods, which is applied in the field of rapid determination of multi-antenna space-time block code recognition thresholds, can solve the problems of increasing the complexity of related processing and the difficulty of obtaining analytical solutions, etc., to reduce computational complexity and increase intuitive effect

Active Publication Date: 2018-06-29
JINLING INST OF TECH
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Problems solved by technology

When n is large and α is greater than 2, it is difficult to obtain an analytical solution to the above equation, which increases the complexity of related processing

Method used

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  • Fast determination method for multi-antenna space-time block coding recognition threshold
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  • Fast determination method for multi-antenna space-time block coding recognition threshold

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Embodiment Construction

[0042] The present invention is described in further detail now in conjunction with accompanying drawing.

[0043] like figure 1 The fast determination method of the multi-antenna space-time block code identification threshold shown specifically includes the following steps:

[0044] 1. Condition adaptability test

[0045] Considering the identification of STBC codes in MIMO-OFDM communication signal identification if the literature (Y.A.Eldemerdash, O.A.Dobre, B.J.Liao, "Blind Identification of SM and Alamouti STBC-OFDM Signals", IEEE Transactions on Wireless Communications, vol.14, pp.972 -982, 2015.) proposed a space-time block code recognition algorithm based on order statistics, the process of which is:

[0046] First, based on the maximum value of the autocorrelation function between any two receiving antennas, the feature quantity is defined

[0047] γ=maxF c (τ),

[0048] In the formula: where F ij (τ) is the delay autocorrelation function between any two diffe...

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Abstract

The invention discloses a fast determination method for a multi-antenna space-time block coding recognition threshold. Aiming at the problem of computing a judgment threshold in MIMO space-time blockcoding type recognition based on an order statistic magnitude, by introducing an extremum value statistic magnitude theory into the computation, an analytically expressive threshold fast determinationmethod is provided. The method comprises a basic thinking including the steps of 1, computation of assistant constants: computing two normalization constants according to the extremum value theory; 2, building of an approximate equation: using a Gumbel function to replace a power function of an incomplete Gamma function in threshold solution, thus acquiring the approximate equation of threshold solution; and 3, approximate solution of the threshold: computing the assistant constant according to a set false alarm probability, and solving the approximate equation to acquire an analytical solution of the threshold. A simulation result proves that when the parameter is proper, the threshold in MIMO code type recognition can be fast and accurately computed.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a method for quickly determining a recognition threshold of a multi-antenna space-time block code. Background technique [0002] Gamma distribution, as a commonly used distribution in signal processing. Note that the distribution function of the Gamma random variable is the incomplete Gamma function P n (α, x), therefore, when the Gamma random quantity or its derived random quantity is used as the statistic of signal detection or recognition, it usually involves issues such as threshold determination and performance statistical analysis. In recent years, with the development of a new generation of wireless communication technology, the MIMO transmission system has become the core technology of wireless transmission in 4G and 5G mobile communication systems. Correspondingly, the problem of signal identification in MIMO scenarios has become a hot issue in th...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04B7/0413
CPCH04B7/0413H04L1/0643
Inventor 胡国兵陈正宇赵嫔娇陶永会姜志鹏杨莉周睿
Owner JINLING INST OF TECH
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