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Cognitive radio interference suppression method based on genetic algorithm

A cognitive radio and interference suppression technology, applied in wireless communications, baseband systems, electrical components, etc., can solve problems such as the inability to guarantee the quality of cognitive user data transmission, and achieve the effect of ensuring data transmission quality and suppressing multi-user interference.

Active Publication Date: 2017-09-22
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a cognitive radio interference suppression method based on a genetic algorithm, which is used to solve the problem that the existing cognitive radio spectrum pool multi-user interference suppression method cannot guarantee the quality of cognitive user data transmission

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  • Cognitive radio interference suppression method based on genetic algorithm
  • Cognitive radio interference suppression method based on genetic algorithm
  • Cognitive radio interference suppression method based on genetic algorithm

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with accompanying drawing:

[0042] The specific implementation of the spectrum pool is to divide the spectrum of the authorized user into multiple subbands, so that the bandwidth of one subband of the authorized user matches the integer multiple of the carrier spacing △f of the cognitive user, such as figure 1 , the licensed user spectrum is divided into multiple sub-bands, and the bandwidth of each sub-band matches the 4 sub-carriers of cognitive users. The occupancy / idle state of a subcarrier can be identified by an allocation vector. If the subcarrier is occupied by an authorized user or is determined to be an invalid subcarrier, the corresponding position of the allocation vector is marked with "1"; if it is in an idle state, it can be recognized If used by the user, the corresponding position is marked with "0". After obtaining the available resource information, the data to be sent is transmitt...

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Abstract

The invention discloses a cognitive radio interference suppression method based on a genetic algorithm and mainly solves the problem that the cognitive user data transmission quality cannot be ensured through utilization of an existing cognitive radio spectrum pool multi-user interference suppression method. The method comprises the steps of setting a cognitive user data transmission rate threshold R<thr>; calculating a shielding carrier sequence length L according to the threshold; randomly selecting a set B of L carriers from cognitive user subcarriers as a primary election sequence, wherein the i is equal to 1, 2, ......, L; selecting an optimum intermediate carrier sequence through a fitness function; generating a new carrier sequence through crossover mutation, continuously adjusting the fitness function and generating a new intermediate carrier sequence until the fitness reaches a set threshold and the iteration process of the genetic algorithm is converged, obtaining the optimum interference subcarrier sequence, and shielding the optimum interference subcarrier sequence, thereby realizing the cognitive radio interference suppression.

Description

Technical field: [0001] The invention relates to the technical field of interference suppression among multiple users of a cognitive radio frequency spectrum pool, and specifically relates to a genetic algorithm-based cognitive radio interference suppression method. Background technique: [0002] The traditional wireless spectrum allocation scheme is to allocate most of the spectrum to radio business departments in a licensed manner, while the remaining small part of the spectrum is used as public unlicensed spectrum. This static spectrum allocation scheme leads to the contradiction that the utilization rate of the licensed frequency band is low and other users cannot use the idle frequency band. The cognitive radio technology based on the concept of dynamic spectrum access can make use of temporarily idle spectrum resources, which greatly improves the current tight situation of spectrum resources. Spectrum pooling is the most efficient spectrum usage technique in cognitive...

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Application Information

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IPC IPC(8): H04L25/03H04W16/14
CPCH04L25/03821H04W16/14
Inventor 刘苗王忠东孙振兴
Owner NORTHEAST GASOLINEEUM UNIV
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