Iterative soft sequential estimation assisted acquisition of m-sequences

A novel iterative soft sequential-estimation (ISSE) method is proposed for the acquisition of m-sequences. The ISSE algorithm is designed based on the principle of iterative soft-in-soft-out (SISO) decoding. The employment of the proposed ISSE acquisition scheme is particularly beneficial for the acquisition of long m-sequences. Results demonstrate that a chip signal-to-noise ratio reduction of ∼10 dB is achievable at an erroneous acquisition probability of 10^-4.