Title :
Use adaptive filter to demodulate MPAM signals
Author :
Yanxin, Li ; Aiqun, Hu ; Xianjin, Li ; Yinghui, Zhou
Author_Institution :
Res. Center of Inf. Security, Southeast Univ., Nanjing, China
Abstract :
The paper presents a novel method for demodulating the M-ary PAM (MPAM) signals basing on the adaptive transversal filter weigh. 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 MPAM demodulation. The novel adaptive MPAM demodulation does not require the adaptive filter completing convergence. Therefore, the sampling rate and processing speed are decelerated. Computer simulation 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 being convenient in implementation with DSP technology and having lower error rates than correlation modulation at the same sampling rate.
Keywords :
adaptive filters; demodulation; least mean squares methods; pulse amplitude modulation; signal sampling; transversal filters; DSP technology; LMS; M-ary PAM; MPAM signals; adaptive demodulation; adaptive transversal filter weigh; digital signal processing; least mean square error; pulse amplitude modulation; sampling rate; Adaptive filters; Computational modeling; Computer errors; Computer simulation; Demodulation; Error analysis; Filtering algorithms; Least squares approximation; Signal sampling; Transversal filters; MPAM; adaptive filter; demodulation;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2005. MAPE 2005. IEEE International Symposium on
Print_ISBN :
0-7803-9128-4
DOI :
10.1109/MAPE.2005.1618153