High dynamic range transceiver

摘要

This invention uses one or more cancellation modules to eliminate the transmitter leakage at the output of the receive antenna and prior the receiver circuitry so that the received signals can be analyzed without degradation in quality due to simultaneous operation of the transmitter and receiver. Each cancellation circuit could be limited to only 30-50 dB of rejection due to component mismatches and other circuit non-idealities. To obtain further cancellation, more than one cancellation circuit can be applied after the first low noise amplifier. The output of the low noise amplifier can be repeatedly mixed with additional cancellation signals “n” number of times such that the “n” low noise amplifier is mixed with the “nth” cancellation signal. For each additional cancellation signal added a 20-30 dB reduction in noise may be achieved such that cascading three or four cancellation signals from cancellation modules may produce a 150 dB gain.

主权项

1. A communication system, comprising:
a transmitter connected to a first antenna; an amplitude phase shift module having a first input connected to the transmitter, a second input connected to a processor and an output connected to a combiner; a receiver connected to the combiner; a first power and phase detector module, connected to the output of the amplitude phase shift module, that samples the output of the amplitude phase shift module in order to generate a first set of phase and amplitude data and sending the first phase and amplitude data to the processor; and a second power and phase detector module connected to the processor and a second antenna where the second power and phase detector module that samples received signals from the second antenna in order to generate a second set of phase and amplitude data and sending the second set of phase and amplitude data to the processor for generating and sending an adjustment feedback signal to the amplitude phase shift module enabling the amplitude phase shift detector to modify its output to the combiner such that the receiver gets the received signals without transmit leakage.