Low cost interoperable satellite digital audio radio service (SDARS) receiver adapted to receive signals in accordance with advantageous frequency plan

A communications system comprising:

• first means for transmitting signals from a first transmitter on first and second carrier frequencies, said first carrier frequency being at a first low end of a band and said second carrier being at a second higher end of said band said first carrier being approximately 2333 megahertz;
• second means for transmitting signals from a second transmitter on third and fourth carrier frequencies, said third carrier being at said lower end of said band but higher in frequency than said first carrier and said fourth carrier being at said higher end of said band but lower in frequency than said second carrier;
• and
• third means for transmitting signals from a third transmitter on fifth and sixth carrier frequencies, said fifth carrier frequency being higher in frequency than said third carrier frequency and said sixth carrier frequency being lower in frequency than said fourth carrier frequency.

A communications system comprising:

• a first satellite having a first transmitter, said first transmitter adapted to transmit signals on first and second carrier frequencies, said first carrier frequency being at a first low end of a band and said second carrier being at a second higher end of said band;
• a second satellite having a second transmitter, said second transmitter adapted to transmit signals on third and fourth carrier frequencies, said third carrier being at said lower end of said band but higher in frequency than said first carrier and said fourth carrier being at said higher end of said band but lower in frequency than said second carrier;
• and
• a terrestrial repeater having a third transmitter, said repeater transmitter adapted to transmit fifth and sixth carrier frequencies, said fifth carrier frequency being higher in frequency than said third carrier frequency and said sixth carrier frequency being lower in frequency than said fourth carrier frequency.

A communications system comprising:

• a first satellite having a first transmitter, said first transmitter adapted to transmit signals on first and second carrier frequencies, said first carrier frequency being approximately 2333 megahertz and said second carrier being approximately 2344 megahertz;
• a second satellite having a second transmitter, said second transmitter adapted to transmit signals on third and fourth carrier frequencies, said third carrier being approximately 2335 megahertz and said fourth carrier being approximately 2342 megahertz;
• and
• a terrestrial repeater having a third transmitter, said repeater transmitter adapted to transmit fifth and sixth carrier frequencies, said fifth carrier frequency being approximately 2337 megahertz and said sixth carrier frequency being approximately 2340 megahertz;
• first means for modulating a first signal onto said first, third and fifth carriers whereby said first, third and fifth carriers comprise a first ensemble;
• second means for modulating a second signal onto said second, fourth and sixth carriers whereby said second, fourth and sixth carriers comprise a second ensemble;
• and
• a receiver adapted to receive said first and said second ensembles.

A method for communicating signals in accordance with a predetermined frequency plan including the steps of:

• transmitting signals from a first transmitter on first and second carrier frequencies, said first carrier frequency being at a first low end of a band and said second carrier being at a second higher end of said band;
• transmitting signals from a second transmitter on third and fourth carrier frequencies, said third carrier being at said lower end of said band but higher in frequency than said first carrier and said fourth carrier being at said higher end of said band but lower in frequency than said second carrier;
• and
• transmitting signals from a third transmitter on fifth and sixth carrier frequencies, said fifth carrier frequency being higher in frequency than said third carrier frequency and said sixth carrier frequency being lower in frequency than said fourth carrier frequency.