DUAL MODE QAM/VSB RECEIVER

WIPO Patent Application WO2000027066

A3

A television receiver system capable of receiving and demodulating television signal information content that has been modulated and transmitted in accordance with a variety of modulation formats is disclosed. In particular, the system is able to accommodate receipt and demodulation of at least 8 and 16-VSB modulated signals in order to support US HDTV applications, as well as 64 and 256-QAM modulated signals, for European and potential US CATV implementations. The system includes carrier and timing recovery loops adapted to operate on an enhanced pilot signal as well as decision directed carrier phase recovery loops. Phase detectors operate on I and Q rail signals, or generate a Q rail from a Hilbert transform of the I rail. Decision directed loops incorporate a trellis decoder in order to operate on sequence estimated decisions for improved reliability in poor SNR environments.

JAFFE STEVEN T (US)
LIU TIAN-MIN (US)
TAN LOKE KUN (MY)

PCT/US1999/026084

November 23, 2000

November 03, 1999

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BROADCOM CORP (US)
JAFFE STEVEN T (US)
LIU TIAN MIN (US)
TAN LOKE KUN (MY)

H04B1/68; H04L25/03; H04L27/02; H04L27/06; H04L27/227; H04L27/34; H04L27/38; H04N5/21; H04N5/44; H04N5/455; H04N5/46; H04L27/00; H04N11/00; (IPC1-7): H04L27/00; H04N5/46; H04L27/227; H04L25/03

EP0769873A1	1997-04-23
US5799037A	1998-08-25
US5715012A	1998-02-03
US5025455A	1991-06-18
US4085378A	1978-04-18
US5757855A	1998-05-26
EP0543586A2	1993-05-26
US5453797A	1995-09-26
US5602602A	1997-02-11
EP0887796A2	1998-12-30

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