Distributed digital radio system
First Claim
1. A distributed digital radio system comprising:
- a central digital radio signal processor (DRSP) having data link interface devices for coupling to data links;
a plurality of speaker modules remote from and coupled to the signal processor by at least one data link, each speaker module having at least one speaker, a data link interface for receiving data from the data link, a digital-to-analog converter, and an amplifier coupled to the converter for each speaker;
an antenna module remote from and coupled to the digital signal processor by a data link, the antenna module having analog circuitry for coupling to an antenna and processing radio signals, converter means for converting between analog and digital signals, a and a data link interface for coupling digital signals to the data link.
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Abstract
A central digital signal radio processor (DRSP) is separated from all analog inputs and outputs by digital data links. Each end of a data link couples to an interface which has transmit and receive capability using cancellation techniques to allow full duplex transmission. An antenna module located at the antenna processes much of tuning functions in analog and then converts the signal to digital and sends it to the DRSP for further processing. Transmitted digital signal from the DRSP are converted to analog by the antenna module and sent to the antenna. Microphones, tape and CD players and other inputs are similarly linked to the DRSP. The DRSP digital audio output is sent to speaker modules which convert to analog signals for driving speakers.
55 Citations
18 Claims
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1. A distributed digital radio system comprising:
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a central digital radio signal processor (DRSP) having data link interface devices for coupling to data links; a plurality of speaker modules remote from and coupled to the signal processor by at least one data link, each speaker module having at least one speaker, a data link interface for receiving data from the data link, a digital-to-analog converter, and an amplifier coupled to the converter for each speaker; an antenna module remote from and coupled to the digital signal processor by a data link, the antenna module having analog circuitry for coupling to an antenna and processing radio signals, converter means for converting between analog and digital signals, a and a data link interface for coupling digital signals to the data link. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A distributed digital radio system comprising
a central digital radio signal processor (DRSP) having an input data link interface (DLI) and an output DLI; -
a plurality of antenna modules remote from the DRSP, each comprising an antenna, tuner circuitry, an analog-to-digital converter (ADC) for producing a digitized signal corresponding to a received analog signal, and a first remote DLI coupled to the ADC, the first remote DLI of each antenna module being connected to the input DLI of the DRSP by a corresponding data link to carry digitized signals between the DRSP and the respective antenna module; at least one speaker module remote from the DRSP comprising a speaker, a second remote DLI, a digital-to-analog converter, and an amplifier for driving the speaker; and a second data link connecting the output DLI of the DRSP to the second remote DLI for supplying a digitized audio signal to the speaker module. - View Dependent Claims (16, 17, 18)
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Specification