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Simple solution method of code pattern classification decision threshold of 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: 2018-11-02
NANJING COLLEGE OF INFORMATION TECH
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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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  • Simple solution method of code pattern classification decision threshold of MIMO system
  • Simple solution method of code pattern classification decision threshold of MIMO system
  • Simple solution method of code pattern classification decision threshold of MIMO system

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Embodiment Construction

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

[0049] Step 1. Recognition statistics construction: for the classification and recognition of coding types in the MIMO system, the recognition statistics γ are constructed to convert the classification and recognition of coding types in the MIMO system into a binary hypothesis test 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 expand the analytical expression of the decision threshold with a first-order Taylor series to obtain the approximate equation for the decision threshold solution;

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

[0052] Step 4. Solve the decision threshold: use ...

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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, the maximum value of the random vector that obeys the central chi-square distribution as an important identification statistic 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 the receiving antenna is 2, its 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 include the incomplete Gamma function. If the identificatio...

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Application Information

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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
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