product
General - Universal QAM demodulator
Product code: CMS0006
Our universal QAM Demodulator core is aimed at broadband point-to-point and point-to-multipoint applications and supports QAM orders from 2 (BPSK) to 256.
Integrates with Commsonics QAM Modulator(CMS0004), Reed-Solomon(CMS0013) and Viterbi(CMS0002) cores to form a complete broadband Modem.
Also see
Block diagram
* Click on image for further information
Technical data brief,
8th May 2007 (272 kB)Features
Low demodulator implementation loss
<0.2dB (16QAM), <0.4dB (256QAM).
IF sub-sampling or I/Q baseband input.
Wide carrier acquisition range.
Programmable symbol rate.
Large QAM support : BPSK .. QAM-256.
Variable ADC sampling frequency.
Applications
Cable downstream
(e.g. DOCSIS, DVB-C).
Point-to-point terrestrial microwave
(e.g. ETSI, FCC channels up to 56MHz).
Satellite up/downlink
(e.g. DVB-S, DVB-DSNG).
Burst-mode TDMA
(e.g. Cable upstream).
Supported Demodulators
Single external clock source.
Single external analogue AGC loop.
All-digital timing and carrier recovery.
Digital channel filtering.
Optimised for ASIC, Xilinx and Altera.
Evaluation boards available.