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Frequency domain weighted multi-modulus method for optimizing DNA sequence of novel varied DNA genetic artificial fish swarm

A DNA sequence, artificial fish swarm technology, applied in the direction of the shaping network and baseband system components in the transmitter/receiver, can solve the problems of large residual mean square error and slow convergence speed.

Active Publication Date: 2015-10-28
NANJING UNIV OF INFORMATION SCI & TECH
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AI Technical Summary

Problems solved by technology

[0005] When multi-mode algorithm (MMA) equalizes high-order multi-mode QAM signals, the error function does not match the signal constellation model, which will lead to the defects of slow convergence and large residual mean square error

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  • Frequency domain weighted multi-modulus method for optimizing DNA sequence of novel varied DNA genetic artificial fish swarm
  • Frequency domain weighted multi-modulus method for optimizing DNA sequence of novel varied DNA genetic artificial fish swarm
  • Frequency domain weighted multi-modulus method for optimizing DNA sequence of novel varied DNA genetic artificial fish swarm

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Embodiment Construction

[0083] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0084] The new variant DNA genetic artificial fish swarm algorithm is applied to the frequency-domain weighted multi-mode blind equalization algorithm, which is further detailed as follows:

[0085] The input signal of the equalizer is taken as the input of the new mutant DNA genetic artificial fish swarm algorithm, and the cost function of FWMMA is used as the second fitness function of the new mutant DNA genetic artificial fish swarm algorithm after appropriate transformation, and the constraint condition is taken as the first A fitness function is used to find the initial optimal time-domain weight vector of the blind equalizer by using the optimization ability of the new mutant DNA genetic artificial fish swarm algorithm. The block diagram of frequency-domain weighted multi-mode blind equalization algorithm is as follows: figure 1 shown.

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Abstract

The invention discloses a frequency domain weighted multi-modulus method for optimizing DNA sequence of novel varied DNA genetic artificial fish swarm. Aiming at the defects of low convergence rate and high residual mean square error caused by mismatching of error function with a signal constellation model during balancing a high-order multi-modulus QAM signal by a multi-modulus blind equalization method (MMA), a frequency domain weighted multi-modulus method (nmDNAG-AFS-DNA-FWMMA) for optimizing DNA sequence of novel varied DNA genetic artificial fish swarm is developed. The advantages of fast convergence rate and high global searching ability of the optimization method for the novel varied DNA genetic artificial fish swarm is utilized by the method, the DNA optimal sequence is searched through a DNA constraint model and cost function, the sequence serves as an initial optimal weight vector of the frequency domain weighted multi-modulus method (FWMMA) after encoding, so that the convergence rate is increased, and the residual mean square error is reduced. The embodiment shows that the nmDNAG-AFS-DNA-FWMMA is high in convergence rate and low in mean square error.

Description

technical field [0001] The invention relates to the technical field of blind equalization, in particular to a frequency-domain weighted multi-mode method for optimizing DNA sequences of artificial fish swarms genetically modified by new mutations. Background technique [0002] In order to eliminate inter-symbol interference and improve the performance of the communication system, a blind adaptive equalization technology that does not require training and can compensate channel characteristics and eliminate inter-symbol interference only by using the statistical characteristics of the received signal is required at the receiving end. . The multi-mode algorithm (MMA, Multi-Modulus Algorithm) has two error functions, the real part and the imaginary part, and uses the in-phase and quadrature components of the signal at the same time, so that the output signal of the equalizer tends to be a rectangle instead of a circle. MMA effectively eliminates the phase offset of the signal ...

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Application Information

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IPC IPC(8): H04L25/03
Inventor 郭业才王惠陆璐吴华鹏禹胜林
Owner NANJING UNIV OF INFORMATION SCI & TECH
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