Cognition radio frequency spectrum sensing method based on multi-antenna Friedman inspection
A cognitive radio and spectrum sensing technology, applied in the field of cognitive radio spectrum sensing based on multi-antenna Friedman test, can solve the problems of inability to obtain these prior information, low time-domain correlation, irrelevance, etc., to overcome the requirements of accurate Predicting noise power, overcoming low time-domain correlation, and good spectrum sensing performance
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[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0020] A cognitive radio spectrum sensing method based on multi-antenna Friedman test proposed by the present invention, its flow chart is as follows figure 1 As shown, it includes the following steps:
[0021] ①Assuming that there are M receiving antennas in the cognitive radio system to receive time-continuous RF signals, then the time-domain continuous RF signals received by the M receiving antennas are expressed as a function of time t, and the i-th receiving antenna receives The time-domain continuous RF signal is denoted as x i (t), where i∈[1,M], M≥2.
[0022] ②Respectively down-convert the time-domain continuous radio frequency signals received by each receiving antenna, and then perform N times of time-domain sampling on each time-domain continuous radio frequency signal obtained after down-conversion processing, and obtain the corr...
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