Patent ID: 6208844
Filing Date: 2001-03-27
Classification: G01S,H04B

Abstract:
A communication system for communicating first information signals at any one of a plurality of communication standards through a common antenna, the communication system comprising:a transmitting unit having a modulator for modulating a transmit second local oscillator (LO) frequency with a transmit baseband information signal to generate a transmit second information signal, an upconverter for upconverting the transmit second information signal with a transmit first LO frequency to generate at least one transmit first information signal, and at least one transmit first information signal output for communicating the at least one transmit first information signal;a receiving unit having at least one receive first information signal input for communicating at least one receive first information signal and a Global Positioning System (GPS) first information signal input for communicating a GPS first information signal, the receiving unit having at least one receive downconverter for downconverting the at least one receive first information signal with a receive first LO frequency to generate a receive second information signal, a GPS downconverter for downconverting the GPS first information signal with the receive first LO frequency to generate a GPS second information signal, and a demodulator for demodulating the receive second information signal and the GPS second information signal with a receive second LO frequency to generate GPS and receive baseband signals; andan antenna coupled to the at least one transmit first information signal output, the at least one receive first information signal input, and the GPS first information signal input for transmitting and receiving first information signals.