Frequency agile RF feedforward noise cancellation system

A frequency agile feedforward noise cancellation system (FFCS) concept was developed to increase the isolation between the transmitter and receiver which share a common antenna in a frequency division duplex (FDD) radio front-end. A cancellation performance of 50 dB was achieved in a bandwidth of 4....

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Bibliographic Details
Published in2008 IEEE Radio and Wireless Symposium pp. 109 - 112
Main Authors Roussel, A., Nicholls, C.W.T., Wight, J.S.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.01.2008
Subjects
Antenna feeds
Bandwidth
feedforward interference cancellation
Flexible electronics
frequency agile duplexer
Frequency conversion
land mobile radio equipment
Noise cancellation
noise reduction
notch filters
Radio frequency
Radio transmitters
Receivers
Receiving antennas
Transmitting antennas
Tunable filters
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Summary:A frequency agile feedforward noise cancellation system (FFCS) concept was developed to increase the isolation between the transmitter and receiver which share a common antenna in a frequency division duplex (FDD) radio front-end. A cancellation performance of 50 dB was achieved in a bandwidth of 4.5 MHz. The performance was maintained throughout a tuning bandwidth of 25 MHz, centered at 836.5 MHz. The FFCS has applications in communication systems requiring tunable notch filters with wideband performance. The research on the FFCS is aimed at developing technology to complement a cellular base station (BTS) duplexer of reduced order and reduced size and capable of operating in any CDMA cellular bands. The FFCS component is envisioned as enabling technology to implement frequency agile duplexers.
ISBN:1424414628
9781424414628
ISSN:2164-2958
2164-2974
DOI:10.1109/RWS.2008.4463440