Title :
Carrier recovery for blind equalization
Author_Institution :
AT&T Bell Lab., Middletown, NJ, USA
Abstract :
Carrier recovery techniques are presented that work with blind equalization of high-order QAM (quadrature amplitude modulation) signal constellations, specifically, the square uncoded 64-QAM and CCITT V.33 cross-trellis-coded 128-QAM constellations. The techniques were confirmed by laboratory experiments using a WE-DSP32-based real-time digital signal processor and analog-simulated voiceband telephone channels containing the common impairments of additive noise, linear distortion, frequency offset, phase jitter, and nonlinear distortion
Keywords :
amplitude modulation; demodulation; digital signal processing chips; real-time systems; QAM; V.33 cross-trellis-coded; WE-DSP32-based real-time digital signal processor; additive noise; analog-simulated voiceband telephone channels; blind equalization; frequency offset; linear distortion; nonlinear distortion; phase jitter; quadrature amplitude modulation; Additive noise; Blind equalizers; Constellation diagram; Digital signal processors; Frequency; Laboratories; Nonlinear distortion; Phase distortion; Quadrature amplitude modulation; Telephony;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on
Conference_Location :
Glasgow
DOI :
10.1109/ICASSP.1989.266652
