University of Khartoum

Spectrally Designed Spread Ing/Despreading Functions To Combat Narrowband Interference In Ds/Ss Communication Systems

Spectrally Designed Spread Ing/Despreading Functions To Combat Narrowband Interference In Ds/Ss Communication Systems

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Title: Spectrally Designed Spread Ing/Despreading Functions To Combat Narrowband Interference In Ds/Ss Communication Systems
Author: A. ALI, HAMID
Abstract: The work presented in this paper in volves analogue noise-like spreading functions each with a completely flat amplitude spectrum and a pseudo-random phase spectra. These types of spreadi ng functions have shown significant advantage over the classical binary ones in terms of being insensitive to the different types of jamming. The despreadi ng function is constructed in such away that its spectrum can be modifi ed in response to the channel narrow band perturbations whether intentional; such as single tone, multiple tone or frequency agile, or unintentional; like fr equency selective fading and co-channel interference among fixed frequency users. Low probability of intercept (LPI) performance against delay and multiply rece ivers is improved by this wide-band signal. A baseband system using this type of spread spectrum signal has been simulated and its bit error rate perform ance against a single tone, multi-tones and narrowband interferers is presented.
URI: http://hdl.handle.net/123456789/6590
Date: 2006-09


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