Correlation signal power optimization and adaptive threshold detection for PN code acquisition in DSSS systems
Huang Wen-qun · Journal of Circuits and Systems · 2010
An improved pseudonoise (PN) code acquisition scheme based on an adaptive threshold algorithm with constant false alarm probability for the direct-sequence spread-spectrum systems is proposed.To improve the detection performance,correlation signal power and average signal power of two adjacent sign are multiplied correspondingly;also,instead of a fixed threshold,an adaptive threshold varying with noise power and signal-to-noise rate is used to adjudge the variable.Theory analysis and simulation results show that the improved scheme can obtain a better acquisition performance than the original one.