Patent ID: 8576810

Claim:
A method for detecting a secondary synchronization signal, comprising: calculating a channel estimation compensation value of each sub-carrier of a Secondary Synchronization Signal (SSS) symbol in different Cyclic Prefix (CP) modes; obtaining a coherent accumulative result of even half frames and a coherent accumulative result of odd half frames of each sub-carrier according to the channel estimation compensation value of each sub-carrier of said SSS symbol; generating a SSS sequence; using the coherent accumulative results of even sub-carriers in the even or odd half frames and the SSS sequences of the even sub-carriers to perform correlation calculation and compute an energy, obtaining an index {circumflex over (m)} i of the SSS sequence corresponding to an over-threshold value of a first round detection, determining indexes m 0 , m 1 composing the SSS sequence used in a second round detection according to the index {circumflex over (m)} i , wherein one of m 0 and m 1 is {circumflex over (m)} i , m 1 −m 0 =Δ j , and Δ j =1, 2 . . . , 7; using the coherent accumulative results of all the sub-carriers in the even and odd half frames and SSS sequences of all the sub-carriers to perform collocation correlation calculation and compute an energy, obtaining an over-threshold value of the second round detection; and obtaining a CP mode according to parameters corresponding to the over-threshold value of the second round detection, and calculating a cell Identifier (ID) and a radio frame boundary.