SYNERGETIC TRANSMITTING SYSTEM FOR DIGITAL BROADCAST SFN AND METHOD THEREOF
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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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Citations
35 Claims
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1-20. -20. (canceled)
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21. A cooperative transmission system applied in a digital broadcasting single frequency network, comprising:
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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 together; wherein each of the double-layer cooperative transmission structures with the same frequency comprises; a main transmission layer, comprising several main transmitters having the same transmitting frequency;
an auxiliary transmission layer, comprising several auxiliary transmitters having the same transmitting frequency;
wherein, in each of the double-layer cooperative transmission structures with the same frequency, a coverage range of electromagnetic wave transmitted by the main transmitters is larger than the coverage range of electromagnetic wave transmitted by the auxiliary transmitters; and
there is an electromagnetic wave transmitted by at least one of the auxiliary transmitters in the coverage range of the electromagnetic wave transmitted by one main transmitter;
the electromagnetic wave transmitted by the main transmitters and the electromagnetic wave transmitted by the auxiliary transmitters have the same frequency, carry the same information symbols and meet a synchronization relationship required for avoiding inter-symbol interference;the electromagnetic wave transmitted by the main transmitters in the first double-layer cooperative transmission structure with the same frequency and the electromagnetic wave transmitted by the main transmitters in the second double-layer cooperative transmission structure with the same frequency have different frequencies. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification