Differential acquisition of m-sequence using sum-product iterative decoding method
Zhisong Bie, Kai Niu, Zhang Li, Weiling Wu · IET International Conference on Wireless Mobile and Multimedia Networks Proceedings (ICWMMN 2006) · 2006
Sum-product algorithm has been considered as near-optimal decoding algorithm for LDPC-like codes. In this paper, sum-product algorithm is used to acquisition of m-sequences and a special property of m-sequences is utilized to implement incoherent differential acquisition for single path channel. A simplified method to find the correct original phase given the correct phase of differentiated sequence is also proposed. Analysis and simulation results show that the proposed algorithm achieves very good performance. (4 pages)