Patent ID: 8737909
Filing Date: 2014-05-27
Classification: H04K

Abstract:
1. A radio system defining a receive radio band and providing long-range radio communications with a second radio in the presence of at least one co-located overlapping radio, such as a jammer or other radio transmitter, that is operating in a frequency band overlapping the receive band said radio system comprising: A) a radio transmitter; B) a digital computer processor having a first port and a second port and programmed: C) a first down-converter and a first digitizer said first down-converter being adapted to down convert a first radio signal to a lower frequency radio frequency and to transmit the lower frequency signal to the first digitizer, said first digitizer being adapted digitize said lower frequency signal and to transmit it to the first port of said digital computer, D) a second down-converter and a second digitizer said second down-converter being adapted to down convert a second radio signal to a lower frequency radio frequency and to transmit the lower frequency signal to the second digitizer, said second digitizer being adapted digitize the lower frequency signal and to transmit it to the second port of said digital computer, E) a sampling means for sampling transmit signals from at least one co-located overlapping radio and for transmitting the sampled signals to said first down converter; and F) an antenna system adapted to receive radio signals transmitted from said second radio within said receive radio band and for transmitting the radio signals to said first down converter; wherein the digital computer processor is also programmed with an algorithm adapted to estimate and store in a first step a complex transfer function associated with the co-located overlapping radio transmitter and in a second step to perform signal acquisition and processing using the saved complex transfer function to reduce the leakage component in the receive signal.