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A reconfigurable decision-feedback equalizer chip set architecture for high bit-rate QAM digital modems

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2 Author(s)
Lu, F. ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA ; Samueli, H.

A 70-MHz decision-feedback equalizer chip set using novel architecture and circuit design techniques that can accommodate a wide variety of modulation formats (QPSK, 16-, 64-, 256-QAM) is proposed. The equalizer is configurable into either a symbol-spaced or fractionally spaced structure. The CMOS chips are full cascadable to implement longer filter lengths without any speed degradation, and the coefficient updating circuitry for implementing the LMS algorithm is included on-chip

Published in:

Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on

Date of Conference:

14-17 Apr 1991