White Papers

Joint Scale-Lag Diversity in Mobile Wideband Systems

Overview This paper considers the effect of mobility on a wideband Direct Sequence Spread Spectrum (DSSS) communication system, and study a scale-lag Rake receiver capable of leveraging the diversity that results from mobility. A wideband signal has a large bandwidth-to-center frequency ratio, such that the typical narrowband Doppler spread assumptions do not apply to mobile channels. Instead, the paper assumes a more general temporal scaling phenomenon, i.e., a dilation of the transmitted signal's time support. Based on uniform ring of scatterers model, the paper determines that the wideband scattering function, which quantifies the average scale spreading, has a "Bathtub-shaped" scale profile.

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Publisher: Ohio State University
File Format: PDF
Date Published: Aug 31, 2007
Format: White Papers
Topics: Mobile - Wireless Communications, Bandwidth Issues

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