A novel power ratio detection for frame synchronization in TD-SCDMA systems
Communication Technology（2010）
Abstract
A novel power ratio detection is proposed about the approximation position of downlink synchronization code (SYNC-DL) for initial frame synchronization. This algorithm utilizes the power ratio detection based on the power characteristics of each time slot with low computation loads. In ML (Maximum Likelihood) detection algorithm, frame synchronization can be completed by huge computation loads due to correlation operations between the received subframe lasting 6400 chips and all 32 SYNC-DL sequences. This novel algorithm compresses the position range of SYNC-DL sequence in a subframe, and we call this step the initial frame synchronization. So that the number of chips for further correlation operations in a subframe is much less than that of ML detection(6400 chips). Simulation shows that the novel algorithm has a better tolerance of errors of the initial frame synchronization than that of the traditional CW(characteristic window) detection. The performance of the novel algorithm is analyzed for AWGN (Additive White Gaussian Noise) and Rayleigh fading channel under different SNRs(signal to noise ratio) condition.
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Key words
downlink synchronization code,awgn channels,approximation position,additive white gaussian noise channel,third generation mobile communication system,frame synchronization,maximum likelihood detection,signal to noise ratio,rayleigh fading channel,awgn channel,3g mobile communication,code division multiple access,time division multiple access,power ratio detection,sync-dl sequences,characteristic window detection,maximum likelihood detection algorithm,td-scdma systems,rayleigh channels,power characteristics,tin,additive white gaussian noise,chip
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