Preselector interference rejection and dynamic range extension

摘要

A wireless telemetry module and associated method reject interference in a received signal. The wireless telemetry module includes an antenna receives a communication signal transmitted at a desired channel frequency and having a channel bandwidth. A transceiver is controlled to operate in receiving and transmitting modes by a processor. An interference rejection module receives control signals from the processor corresponding to the desired channel frequency and is coupled between the antenna and the transceiver when the transceiver is operating in the receiving mode.

主权项

1. A wireless telemetry module comprising:
an antenna configured to receive a communication signal having a channel frequency and having a channel bandwidth; a transceiver configured to operate over a channel range of single channel frequencies including the channel frequency; a processor coupled to the transceiver and configured to control the transceiver to operate in a receiving mode and in a transmitting mode; an interference rejection module coupled between the antenna and the transceiver when the transceiver is operating in the receiving mode and bypassed when the transceiver is operating in the transmitting mode, the interference rejection module configured to attenuate interference signals occurring in a received signal and falling within the channel range and outside the channel range in response to the processor control signals, and provide the transceiver with the communication signal at the channel frequency; a diplexer for frequency duplexing the received signal with a simultaneously transmitted signal being transmitted by the transceiver; and a second diplexer, wherein the interference rejection module is coupled between the diplexers.