Digital VSB detector with bandpass phase tracker, as for inclusi

Details Digital VSB detector with bandpass phase tracker, as for inclusi Digital VSB detector with bandpass phase tracker, as for inclusi

1994-05-04

1995-12-26

Chin, Stephen

Pulse or digital communications

Receivers

375321, H04L 2706, H04L 2702

Patent

active

054794498

ABSTRACT:
In a radio receiver for receiving vestigial sideband (VSB) signals including symbol codes descriptive of digital signals, HDTV signals being exemplary of such VSB signals, a tuner provides for selecting one of channels at different locations in a frequency band used for transmitting such VSB signals. The tuner also includes mixers for performing plural conversion of the selected channel to a final intermediate-frequency signal, which is digitized by an analog-to-digital converter. A phase tracker, operative on narrow-bandpass filtered portions of the digitized final intermediate-frequency signal centering on its carrier frequency, suppresses an imaginary portion of the final intermediate-frequency signal, arising from multipath distortion or from phase incoherency in local oscillations used during frequency conversion. A digital controlled oscillator in the phase tracker supplies digital descriptions of the carrier wave for the final intermediate-frequency signal to a synchronous detector, which synchronous detector detects the real portion of the digitized final intermediate-frequency signal in accordance with those digital descriptions of the carrier wave.

REFERENCES:
patent: 5230011 (1993-07-01), Giels et al.
D. W. Rice et al., "Quadrature Sampling With High Dynamic Range," IEEE Transactions on Aerospace and Electronic Systems, vol. AES-18, No. 4, Nov. 1982.
Norm Hurst, "Implementing Hilbert Transforms in the ACTV Research Hardware", Jul. 1, 1988.
Charles Rader, "A Simple Method for Sampling In-Phase and Quadrature Components", IEEE, 1984, pp. 821-824.
Shahid Qureshi, "Timing Recovery for Equalized Partial-Response Systems", IEEE Transactions on Communications, Dec. 1976, pp. 1326-1330.

Affiliated with

Also associated with

Rating

Digital VSB detector with bandpass phase tracker, as for inclusi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital VSB detector with bandpass phase tracker, as for inclusi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital VSB detector with bandpass phase tracker, as for inclusi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1374627