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Experimental evaluation of voiceband fractionally-spaced blind equalizer based on the constant modulus algorithm

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2 Author(s)
Kaya, M. ; Dept. of Electr. & Comput. Eng., Alberta Univ., Edmonton, Alta., Canada ; Cockburn, B.F.

We describe the results of simulation experiments that evaluated several alternative blind equalizers for use in a voiceband QAM constellation classifier. The test signals included simulated signals as well as recordings of real fax and V.32bis modem test signals made at a monitoring point in the public telephone network. V.32bis has five operating modes that use 4, 16, 32, 64, and 125-QAM symbol constellations to provide bit rates of 4.8, 7.2, 9.6, 12.0, and 14.4 kbits/sec, respectively. Several different timing recovery and fractionally-spaced blind equalizer configurations were considered in conjunction with Godard's (1978) constant modulus algorithm (CMA)

Published in:

Electrical and Computer Engineering, 2000 Canadian Conference on  (Volume:1 )

Date of Conference:

2000