Title :
Practical blind demodulators for high-order QAM signals
Author :
Treichler, John R. ; Larimore, Michael G. ; Harp, Jeffrey C.
Author_Institution :
Appl. Signal Technol. Inc., Sunnyvale, CA, USA
fDate :
10/1/1998 12:00:00 AM
Abstract :
This paper examines the problem of demodulating time dispersed digitally modulated signals with particular emphasis on two aspects: the all-digital implementation of such demodulators and the use of “blind” algorithms for initializing the demodulator in the absence of explicit training by the transmitter. The factors impacting the architecture of blind demodulators are discussed, followed by a description of several practical implementations
Keywords :
VLSI; adaptive equalisers; cable television; demodulators; digital radio; digital signal processing chips; microwave links; modems; quadrature amplitude modulation; DSP chip-based designs; VLSI; all-digital implementation; blind adaptive equalization; blind algorithms; digital cable television; digital microwave radio signals; digital signal processor; digital transmission systems; high-order QAM signals; modulator architecture; practical blind demodulators; receiver; time dispersed digitally modulated signals; very large scale integration; voiceband modems; Adaptive equalizers; Blind equalizers; Data communication; Demodulation; Digital modulation; Modems; Quadrature amplitude modulation; Radio transmitters; Signal design; Signal processing algorithms;
Journal_Title :
Proceedings of the IEEE
