초록 ▼

Within a desired service area, multiple transmitters at separately located sites simultaneously broadcast the same multi-channel, multi-program signal. Broadcast waves from the transmitters propagate substantially throughout the service area and overlap in a substantial portion of the area. The sign

Within a desired service area, multiple transmitters at separately located sites simultaneously broadcast the same multi-channel, multi-program signal. Broadcast waves from the transmitters propagate substantially throughout the service area and overlap in a substantial portion of the area. The signals are broadcast as spread spectrum signals and the receivers include despreaders with rake capabilities to obtain enhanced output signals with multi-path reception. 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., television programs.

대표청구항 ▼

A frequency simulcasting system for transmitting a signal carrying video data from multiple spaced transmitting sites for reception in a reception area wherein at least certain of said transmitting sites are disposed to enclose at least a portion of said reception area, the method comprising the ste

A frequency simulcasting system for transmitting a signal carrying video data from multiple spaced transmitting sites for reception in a reception area wherein at least certain of said transmitting sites are disposed to enclose at least a portion of said reception area, the method comprising the steps of: a) substantially simultaneously transmitting from said transmitting sites the same signal so that the areas of propagation from said respective transmitting sites overlap over at least a substantial portion of the enclosed reception area and also extend therebeyond; b) said same signal transmitted from said transmitting sites including multiplexed channels each including multiplexed streams of digital data transmitted as spread spectrum signals; c) selecting at a receiving site one of said multiplexed channels and from the multiplexed stream of digital data in that channel selecting one set of video data from said digital data; and d) reproducing at least a portion of said one set of said video data as sensorily perceptible information.