Title :
MUOS U2B Interference Mitigation Analysis
Author :
Bahr, Randall K. ; Lee, David K.
Author_Institution :
General Dynamics C4 Systems, Scottsdale, AZ
Abstract :
This paper analyzes the effects on signal-to-noise ratio (SNR) caused by undesired interference within the user-to-base (U2B) MUOS spectrum, and the spectral modifications of the WCDMA waveform designed to combat such interference. Spectral modifications consist of waveform whitening and notching, and are applied to improve performance in the presence of background UHF interference, legacy interferers, and Multiple Access Interference (MAI). Spectral whitening applied at the MUOS receiver mitigates interference by reducing interference power at the demodulator, at a small loss of desired signal power. SNR degradation may be further reduced by applying the spectral whitening calculated at the receiver to the transmitted signal. This technique improves performance by concentrating transmitted power in spectral locations known to be free of interference.
Keywords :
AWGN; Additive white noise; Cause effect analysis; Degradation; Filter bank; Gaussian noise; Multiaccess communication; Multiple access interference; Narrowband; Signal to noise ratio;
Conference_Titel :
Military Communications Conference, 2007. MILCOM 2007. IEEE
Conference_Location :
Orlando, FL, USA
Print_ISBN :
978-1-4244-1513-7
Electronic_ISBN :
978-1-4244-1513-7
DOI :
10.1109/MILCOM.2007.4455291
