Title :
Burst receiver for upstream communications over twisted pair lines
Author :
Paek, Alex W. ; Besbes, Hichem ; Zhang, Yu ; Burk, Ted ; Asghar, Saf ; Milbrandt, Celite ; Webb, Bruce
Author_Institution :
Celite Syst. Inc., Austin, TX, USA
Abstract :
This paper presents algorithms and implementations of a burst receiver chip for upstream communications over twisted pair lines. The receiver is an all-digital chip, which receives digitized IF QAM signal, and demodulate QPSK, 16-QAM or 64-QAM burst data at 312.5 kbauds. The receiver structure consists of direct digital frequency synthesizer (DDFS), several stages of filtering, burst detection, fast acquiring timing/phase/gain recovery, and adaptive equalizer with fast convergence rate. The receiver is prototyped using programmable FPGA.
Keywords :
adaptive equalisers; digital integrated circuits; field programmable gate arrays; frequency synthesizers; quadrature amplitude modulation; quadrature phase shift keying; radio receivers; FPGA; QAM burst data; adaptive equalizer; burst detection; burst receiver chip; demodulate QPSK; digital chip; digitized IF QAM signal; direct digital frequency synthesizer; fast acquiring timing; fast convergence rate; prototype; receiver structure; twisted pair lines; upstream communications; Adaptive equalizers; Adaptive filters; Digital filters; Filtering; Frequency synthesizers; Phase detection; Phase frequency detector; Quadrature amplitude modulation; Quadrature phase shift keying; Timing;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329037
