Spectrum sensing of DVB-T signals based on data smoothing under fast varying channels
WU Ling-ling · Modern Electronics Technique · 2012
In order to detect television white space(TVWS) under fast varying channel and low SNR,and take account the influence of noise on the signals,the received signals before correlation operation were averaged in order to improve the performance of the detector.The results show that the performance of the data smoothing algorithm is higher than the time-domain symbol cross-correlation algorithm by about 8dB and higher than the time-domain symbol auto-correlation algorithm by about 13 dB.