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Narrowband interference avoidance in ultra wideband communication systems

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2 Author(s)
Prasad Yaddanapudi ; Dept. of Electr. Eng., Texas Univ., San Antonio, TX ; Popescu, D.C.

In this paper we present a new method for mitigating narrowband interference in OFDM-based ultrawide band (UWB) communication systems. This is based on spectral shaping of the transmitted signal using binary signature sequences with minimum total squared correlation (TSC) to avoid the narrowband interfering signal. When spectral shaping is employed, the spectrum of the transmitted signal has a gap in the frequency band of the narrowband interfering signal, and therefore avoids transmitting in this band. The proposed method is illustrated with plots that show the spectrum of the transmitted signal with and without spectral shaping. Numerical results obtained from simulations showing the bit error rate (BER) performance of the system with and without spectral shaping are also presented

Published in:

Global Telecommunications Conference, 2005. GLOBECOM '05. IEEE  (Volume:6 )

Date of Conference:

2-2 Dec. 2005

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