Patent ID: 7747274

Claim:
A method of communicating information from a first location to a second location based on a first pulse train having a first pulse width representing a first data value and a second pulse train having a second pulse width representing a second data value, said method comprising: choosing a plurality of RF frequencies; selectively transmitting a first combined RF signal from said first location, said first combined RF signal being based on a plurality of first RF signals, wherein each respective first RF signal has a frequency equal to a respective one of said RF frequencies and a power equal to a respective first transmission power level; selectively transmitting a second combined RF signal from said first location, said second combined RF signal being based on a plurality of second RF signals, wherein each respective second RF signal has a frequency equal to a respective one of said RF frequencies and a power equal to a respective second transmission power level; receiving said first combined RF signal at said second location, wherein the first transmission power levels are chosen so that as a result of attenuation of the first combined RF signal between said first location and said second location, said first pulse train may be reconstructed from the received first combined RF signal; and receiving said second combined RF signal at said second location, wherein the second transmission power levels are chosen so that as a result of attenuation of the second combined RF signal between said first location and said second location, said second pulse train may be reconstructed from the received second combined RF signal.