Title :
A robust and fast-locking all-digital carrier recovery loop for QAM signals
Author :
Vandamme, P. ; Kervarec, J.
Author_Institution :
CNET Lab., Lannion, France
Abstract :
The authors present the design and the implementation of an all-digital carrier recovery loop for quadrature amplitude modulation (QAM) signals. Original features concerning the programmability of the loop, its fast-locking properties in acquisition and restart procedures as well as its wide acquisition range are discussed. The emphasis is on its performance in terms of robustness versus noise and intersymbol interference and protection against potential frequency false-locks. Experimental results are reported for a 16-QAM system
Keywords :
amplitude modulation; demodulators; digital radio systems; 16-QAM system; QAM signals; demodulator; design; implementation; intersymbol interference; performance; programmability; quadrature amplitude modulation; robust fast-locking all-digital carrier recovery loop; wide acquisition range; Baseband; Counting circuits; Demodulation; Equations; Frequency; Intersymbol interference; Phase shifters; Quadrature amplitude modulation; Registers; Robustness;
Conference_Titel :
Communications, 1992. ICC '92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications., IEEE International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-0599-X
DOI :
10.1109/ICC.1992.267992
