2006, Volume 8, Issue 5
Strategic Study of CAE >> 2006, Volume 8, Issue 5
An Adaptive Demodulation Method for BPSK Signals
1. Research Center of Information Security, Southeast University, Nanjing 210096,China
2. PLA University of Science and Technology, Nanjing 210007, China
Next Previous
Abstract
The paper presents a novel method for demodulating the binary phase shift keying (BPSK) signals basing on adaptive filtering. The commonly used least mean square (LMS) error adaptive filtering algorithm is employed for studying the demodulating procedure and the performance of the novel adaptive BPSK demodulation. The novel adaptive BPSK demodulation does not need the adaptive filter completing convergence. The performance of the method in theory is compared with computer simulating results. It shows that the error rates in simulation agree well with that in theory. Also, it is indicated that the demodulation method has many advantages over conventional ones, such as the powerful anti-noise ability, the small transfer delay, and the convenient implementation with DSP technology, and has lower error rates than correlation modulation at the same sample rate.
Keywords
digital communications ; adaptive signal processing ; demodulation ; BPSK
Figures
图1
图2
图3
References
[ 1 ] 胡爱群, 苏杰.自适应FSK解调方法[J].应用科学学报, 1996, 14 (2) :167~172 link1
[ 2 ] 钱志文, 胡爱群.基于自适应滤波的DPSK解调方法及性能[J].移动通信, 2000 (1) :50~52 link1
[ 3 ] 钱志文.基于自适应滤波的ASK解调方法及性能[J].工矿自动化, 2003 (3) :14~16 link1
[ 4 ] Werter M J.FSK demodulation using an adaptive recursivedigital filter[J].IEEE Transaction on Signal Processing, 1996, 44 (7) :1822~1825
[ 5 ] Nishimura S, Aloys M.A lattice-based adaptive IIR notchfilter and its FSK demodulation, IEEE InternationalSymposium on Circuits and Systems[C].Geneva, Switzerland, 2000
[ 6 ] Simon Haykin.Adaptive Filter Theory, Four Edition[M].Publishing House of Electronics Industry, Beijing, 2002.246~266
[ 7 ] Proakis J G.Digital Communications, Four Edition[M].Publishing House of Electronics Industry, Beijing, 2004.255
京公网安备 11010502051620号
