Transmitter noise suppression in receiver

Patent metadata

Field	Value
Publication number	US-8995932-B2
Application number	US-201313734250-A
Country	US
Kind code	B2
Filing date	Jan 4, 2013
Priority date	Jan 4, 2013
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

Systems and methods for suppressing transmitter noise in a receive band of a co-located receiver that are suitable for wideband applications are disclosed. In one embodiment, an analog radio frequency transmit signal output by a transmitter includes a desired signal in a transmit band of the transmitter and transmitter noise in a receive band of a main receiver. A secondary receiver obtains a secondary receiver input signal that is representative of at least the transmitter noise in the receive band of the main receiver and outputs a digital feedforward signal. A digital feedforward transmit noise cancellation subsystem generates a digital transmitter noise cancellation signal that is representative of the transmitter noise in the receive band based on the digital feedforward signal and subtracts the digital transmitter noise cancellation signal from a digital receive signal output by the main receiver to thereby provide a compensated digital receive signal.

First claim

What is claimed is:

1. A system comprising:
a main receiver configured to amplify and downconvert an analog radio frequency receive signal to provide a digital receive signal;
a transmitter configured to upconvert and amplify a digital transmit signal to provide an analog radio frequency transmit signal at an output of the transmitter, the analog radio frequency transmit signal comprising a desired signal in a transmit band of the transmitter and transmitter noise in a receive b…

Assignees

• Ericsson Telefon Ab L M

Inventors

• Wyville Mark

Classifications

• H04B1/525 Primary

  Electricity · mapped topic

• H04B1/62 Primary

  Electricity · mapped topic

• H04B1/123 Primary

  Electricity · mapped topic

• H04B15/00

  Electricity · mapped topic