Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2006-05-24
2011-11-29
Yao, Kwang B (Department: 2473)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S432000
Reexamination Certificate
active
08068452
ABSTRACT:
A cooperative transmission system for single frequency digital broadcasting network and method thereof are disclosed, said system includes a first double-layer cooperative transmission structure with same frequency and a second double-layer cooperative transmission structure with same frequency, which are vertically aggregated; wherein each of the double-layer cooperative transmission structures with same frequency is made up of a main transmission layer including several main transmitters with same transmitting frequency and an auxiliary transmission layer including several auxiliary transmitters with same transmitting frequency; the electromagnetic wave transmitted by the main transmitters in the first double-layer cooperative transmission structure with same frequency and the electromagnetic wave transmitted by the main transmitters in the second double-layer cooperative transmission structure with same frequency have different frequencies. The present invention makes up the disadvantage of the single frequency network, and can greatly improve the spectrum efficiency of broadcasting channel, the coverage (especially the indoor coverage) of broadcasting signal and the effect of mobile receiving of broadcasting signal.
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Banner & Witcoff , Ltd.
Huq Obaidul
Yao Kwang B
ZTE Corporation
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