Patent ID: 8842601

Claim:
A method for detecting a primary synchronization signal in a Long Term Evolution (LTE) system, comprising: directly generating a local primary synchronization signal sequence with equal amplitude in time domain as a matched filter; and performing a front-end processing for a received signal; performing matched filtering between the received signal after the front-end processing and the local primary synchronization signal sequence; judging output amplitude of the signal sequence obtained after the matched filtering; and then obtaining a judgment result of the local primary synchronization signal sequence; wherein the local primary synchronization signal sequence is generated by the following formula: x u ⁡ ( n ) = ⅇ - j ⁢ ⁢ 2 ⁢ ⁢ π ⁢ 31 ⁢ ⁢ n + θ ⁡ ( u ) 63 ⁢ ⅇ - j ⁢ ⁢ π ⁢ ⁢ u ⁢ ( - n × u - 1 ) ⁢ ( - n × u - 1 + 1 ) 63 , n = 0 , 1 , … ⁢ , 62 wherein, θ(u)=4.75, −27.25, 27.25, when u=25, 29, 34; u −1 =28, 50, 13, and u −1 refers to a multiplicative inverse element of u mod N ZC , N ZC =63.