| 摘要 |
Within a desired service area, multiple transmitters (TX1, TX2, TXN) at separately located sites simultaneously broadcast the same multi-channel, multi-program signal. Broadcast waves from the transmitters (TX1, TX2, TXN) propagate throughout substantially overlapping portions of the service area. Obstructions in the service area, e.g. mountains, buildings, trees, etc., may block reception from one or more of the transmitters (TX1, TX2, TXN) at certain sites. However, at most receiving sites, the receiving antenna (31) can receive a clear line-of-sight transmission from at least one of the transmitters (TX1, TX2, TXN). In the preferred implementation, the channels are 6 MHz wide channels broadcast in the super high frequency microwave portion of the spectrum. Each such channel carries a multiplexed digital data stream containing packets of information for a plurality of programs, e.g. TV programs.
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