Cluster frame synchronization scheme for a satellite digital...

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C370S350000, C370S314000, C370S347000, C370S316000, C370S335000

Reexamination Certificate

active

06798791

ABSTRACT:

BACKGROUND OF THE INVENTION
(1) Field of the Invention
This invention relates generally to communications and, more particularly, to satellite broadcast systems.
(2) Background
A proposed satellite digital audio radio system (SDARS) supports multiple audio and data program channels (program channels) for broadcasting CD-like music and talk shows to mobile and fixed receivers. Illustratively, the system provides for the transmission of 100 program channels.
Consequently, there is desired a transmission frame structure for efficient transport of these channels.
SUMMARY OF THE INVENTION
A transmission frame structure is presented for a satellite digital audio radio system (SDARS). An SDARS transmitter processes N program channels into M clusters of program channels, each cluster representing k program channels, where M>1, k>1, and (M)(k)≦N. The SDARS transmitter transmits a transmission signal representing the M clusters and including cluster synchronization information for each cluster such that the cluster synchronization information for each cluster is identical.
In an embodiment of the invention, a satellite digital audio radio system (SDARS) uses one identical maximal length PN (pseudo-random number) sequence as a cluster synchronization word for five clusters. The relative phases of five cluster correlation results is used by a receiver to uniquely identify each individual cluster.
In accordance with a feature of the invention, the above-mentioned five correlation results are combined to improve performance.


REFERENCES:
patent: 4219812 (1980-08-01), Rittenbach
patent: 5802079 (1998-09-01), Wang
patent: 6188441 (2001-02-01), Limberg
patent: 6263505 (2001-07-01), Waalker et al.
patent: 6357029 (2002-03-01), Sinha et al.
patent: 6363061 (2002-03-01), Yuzawa
patent: 6378101 (2002-04-01), Sinha et al.
patent: 6501810 (2002-12-01), Karim et al.
patent: 6526107 (2003-02-01), Katoh et al.
patent: 6556639 (2003-04-01), Goldston et al.
patent: 6564003 (2003-05-01), Marko et al.
patent: 6574338 (2003-06-01), Sachdev

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Cluster frame synchronization scheme for a satellite digital... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cluster frame synchronization scheme for a satellite digital..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cluster frame synchronization scheme for a satellite digital... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3194003

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.