Synchronization of multichannel receiver based on higher quality

Details Synchronization of multichannel receiver based on higher quality Synchronization of multichannel receiver based on higher quality

1985-09-05

1987-06-30

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 14, 375106, H04L 2716

Patent

active

046776478

ABSTRACT:
A synchronization of a multichannel receiver based on higher-quality channels capable of establishing and maintaining timing synchronism stably even when the transmission channels deteriorate due to fading. A plurality of power detectors measure the quality of the baseband signals of a plurality of channel lines and generate a quality signal. A plurality of equalizers generate timing phase deviation signals for the channel lines. A selecting circuit selects at least one channel line using the quality signal. A frequency controlling circuit generates a frequency control signal in accordance with at least one timing phase deviation signal from the selected channel line and controls a sampling frequency of a sampling circuit which converts a transmitted signal into digital form. Thus, the sampling frequency for all channel lines is determined by using the timing phase deviation signal obtained from a high quality channel line. As a result, the timing phase control can be established with stability.

REFERENCES:
patent: 3593147 (1971-07-01), Gurak et al.
patent: 3962637 (1976-06-01), Motley et al.
patent: 4011511 (1977-03-01), Chang
patent: 4061978 (1977-12-01), Motley et al.
patent: 4186347 (1980-01-01), Brockman et al.
patent: 4344177 (1982-08-01), Kustka
Ungerboeck, G., "Fractional Tap--Spacing Equalizer and Consequences for Clock Recovery in Data Modems", IEEE Transactions on Communications, vol. Com--24, No. 8, pp. 856-864, Aug. 1976.
Hirosaki, B., "An Orthogonally Multiplexed QAM System Using the Discrete Fourier Transform", IEEE Transactions on Communications, vol. COM--29, No. 7, pp. 982-989, Jul. 1981.
Hirosaki, B., "An Analysis of Automatic Equalizers for Orthogonally Multiplexed QAM Systems", IEEE Transactions on Communications, vol. COM--28, No. 1, pp. 73-76, Jan. 1980.

Affiliated with

Also associated with

Rating

Synchronization of multichannel receiver based on higher quality does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Synchronization of multichannel receiver based on higher quality, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronization of multichannel receiver based on higher quality will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-452234