Title :
Subband model and implementation of O-QAM system
Author :
Gao, X.Q. ; Zhang, H. ; He, Z.Y.
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing, China
fDate :
30 Apr-3 May 1995
Abstract :
This paper presents a subband filter bank model of N subbands for orthogonally multiplexed QAM system with 2N subchannels. Then, a fast implementation algorithm using polyphase decomposition and discrete cosine transform (DCT) is derived from this model. Compared with the implementation method through discrete Fourier transform, only half the computation cost is needed. Finally, we give the adaptive equalization scheme based on subband adaptive filter theory, and its efficiency is verified by experiments
Keywords :
adaptive equalisers; discrete cosine transforms; filtering theory; multiplexing; quadrature amplitude modulation; DCT; adaptive equalization scheme; discrete cosine transform; orthogonally multiplexed QAM system; polyphase decomposition; subband adaptive filter theory; subband filter bank model; Adaptive equalizers; Adaptive filters; Baseband; Data communication; Discrete Fourier transforms; Discrete cosine transforms; Filter bank; Frequency; Quadrature amplitude modulation; Signal processing algorithms;
Conference_Titel :
Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2570-2
DOI :
10.1109/ISCAS.1995.523786
