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A Simple Solution to the Decision Threshold of Code Pattern Classification in Mimo System

A technology of judgment threshold and systematic code, which is applied in the field of simple solution of MIMO system code type classification judgment threshold, can solve the problem of high computational complexity of the solution method, and achieve the effect of easy hardware implementation and high computational efficiency

Active Publication Date: 2021-03-26
NANJING COLLEGE OF INFORMATION TECH
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  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing solution method has high computational complexity and is inconvenient to realize in the DSP platform, which limits its engineering application prospect

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  • A Simple Solution to the Decision Threshold of Code Pattern Classification in Mimo System
  • A Simple Solution to the Decision Threshold of Code Pattern Classification in Mimo System
  • A Simple Solution to the Decision Threshold of Code Pattern Classification in Mimo System

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Embodiment Construction

[0048] Such as figure 1 As shown, the present invention discloses a simple solution method for the code pattern classification decision threshold of MIMO system, comprising the following steps:

[0049] Step 1, construction of identification statistics: Aiming at the classification and identification of coding types in the MIMO system, the identification statistics γ is constructed, and the classification and identification of coding types in the MIMO system is transformed into a binary hypothesis testing problem;

[0050] Step 2, establish the decision threshold solution equation: use the Gumbel function to replace the incomplete Gamma function in the threshold solution, and use the first-order Taylor series to expand the analytical formula of the decision threshold to obtain the approximate equation of the decision threshold solution;

[0051] Step 3, calculate the normalization constant: According to the extreme value theory, calculate the normalization constant b m ;

[...

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Abstract

The invention provides a simple solution method of a code pattern classification decision threshold of an MIMO system. The method comprises the steps of constructing an identification statistical magnitude, establishing a decision threshold solution equation, calculating a normalization constant, and solving the decision threshold. According to the simple solution method, by adoption of the extreme value theorem, in view of the inversion problem of an incomplete Gamma function, a closed solution of the equation is obtained by calculating the normalization constant b of the Gumbel distributionfunction by using the maximum distribution of an approximate independent identically distributed Gamma random variable of the Gumbel distribution function; by adoption of the simple solution method, the closed solution of the decision threshold in the case of more than two receiving antennas can be obtained; and the simple solution method is high in computational efficiency and is easy to implement on hardware, and can be extended to other related processing under certain conditions.

Description

technical field [0001] The invention relates to a simple solution method for a decision threshold, in particular to a simple solution method for a MIMO system code type classification decision threshold. Background technique [0002] In recent years, as an important identification statistic, the maximum value of a random vector obeying the central chi-square distribution has been widely used in modulation estimation, coding type identification, and satellite acquisition of GNSS receivers. For the coding type in the MIMO system, it can be identified by calculating the maximum value of the cross-correlation function of any two antennas. For the case where there are 2 receiving antennas, the identification decision threshold can be calculated by closed analytical formula. However, when the number of receiving antennas exceeds 2, the cumulative distribution function of the maximum value of the cross-correlation function will contain an incomplete Gamma function. If the identifi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/08
CPCH04B7/0413H04B7/08
Inventor 吴珊珊胡国兵王书旺周波聂佰玲汤滟宋冰丁宁
Owner NANJING COLLEGE OF INFORMATION TECH