Paper Application of Partial Coefficient Update LMS Algorithm to Suppress Narrowband Interference in DSSS System

Transform Domain LMS is discussed in this paper and a partial coefficient update LMS adaptive algorithm (P-LMS) is proposed to suppress narrowband interference in DSSS system. In the new algorithm, it only updates a portion of the coefficients of the adaptive filter, so it reduces a lot of computation. It is convenient to implement on FPGA/DSP. The algorithm also has faster convergence speed and little steady state error. The algorithm is applied to the DSSS system to suppress narrowband interference system and it works very well. Computer simulation results confirm the theoretical analysis.