An uplink burst signal detection method with midamble sequence in TD-SCDMA system

For the TD-SCDMA uplink burst signal detection in low SNR, this paper proposed a method, which uses the high-degreed correlation of the same midamble sequence. As the local midamble sequence matched with the received midamble sequence, there would be a residual carrier or direct current signal. By analyzing its power spectrum, the certain user´s uplink burst signal can be detected, and the carrier´s frequency can be estimated accurately, too. Studies have shown that the approach can effectively overcome the offset of the residual frequency.