Fast Dynamic Wideband Spectrum Detection Method Based on Analog Filter Bank

Abstract

The invention discloses a fast dynamic broadband spectrum detection scheme based on an analog filter bank. The scheme comprises the following steps: setting a sub-frequency band total number N, an initial detection step length b, an initial detection window left endpoint k, and a maximum step length threshold bmax; detecting whether the energy sum P[k,k+b] of all sub-frequency bands in the window is greater than the energy threshold value Th[k,k+b] of the corresponding window, if the energy sum P[k,k+b] is greater than the energy threshold value Th[k,k+b], orderly detecting each sub-frequency band energy in the window, and determining whether the sub-frequency band is occupied, and updating the detected left window k as k+b+1 after the detection; if the energy sum P[k,k+b] is less than the energy threshold value Th[k,k+b], updating the window left endpoint k as k+b+1 and the window step length as b-2*b, wherein the right endpoint is k+b if the window step length is not more than the maximum step length value bmax, and the right endpoint is k+bmax if the window step length is more than the maximum step length value bmax; cycling the above energy detection steps until completely detecting N sub-frequency bands. Based on the analog filter bank, the fast dynamic broadband spectrum detection scheme is cheap in construction cost and strong in practicability, and the detection cost is reduced; according to the detected spectrum resource use condition, the detection step length is dynamically adjusted, and the fast detection of the broadband spectrum is realized.

Description

technical field [0001] The invention relates to a broadband spectrum detection scheme, which effectively solves the problems of slow spectrum detection speed and high price based on fast dynamic broadband spectrum detection of analog filter banks, and belongs to the field of cognitive radio. Background technique [0002] In recent years, with the rapid development of broadcast communication and other fields, spectrum resources have become increasingly scarce, and cognitive radio technology has emerged as the times require, and spectrum sensing is an important part of cognitive radio technology. [0003] Spectrum sensing can be roughly divided into narrowband spectrum detection and wideband spectrum detection. Compared with narrowband spectrum sensing, wideband spectrum sensing is obviously quite challenging. Problems such as high equipment prices, slow detection speed, and low accuracy are very serious. [0004] At present, many technologies for wideband spectrum sensing ar...

AI Technical Summary

Problems solved by technology

[0009] Based on the above analysis, in order to solve the problem of expensive equipment and long detection time in broadband spectrum sensing, the present invention proposes a fast dynamic broadband spectrum detection scheme based on analog filter banks, including the following steps:

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