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General - Universal QAM demodulator

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  • 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

- Universal QAM/PSK modulator - DVB-C/J83 demodulator - Viterbi codecs - Reed-Solomon codecs

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.