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Capacity of Structured UWB Architecture Based on Single Bit Detection Processing

R. Pasand, J. Nielsen, A. Sesay
Wireless 2004 proceedings, Calgary, Alberta, pp. 412-419, July 12-14, 2004

This paper investigates the information theoretic capacity of spread spectrum Pulse Position Modulation (PPM) Ultra Wideband (UWB) communications for single user channels. The capacity is evaluated for a Rake receiver based on uniform sampling and single bit sampling quantization. This Rake architecture denoted as the Single Bit Rake receiver (SBR). The propagation channel is modeled with a link impulse response with delay spread and Inter Pulse Interference (IPI). IPI noise is considered as a function of decay rate of channel impulse response. Capacity per pulse of SBR is developed as a function of block out period and Frame length. There is a structured imposed on chip period such that there is only a portion of frame length that is eligible for transmission of a pulse. The intuitive motivation for the block out period is to reduce the IPI, however, as shown, the capacity is actually optimum with no block out period.

CONTACTS: Reza Pasand, John Nielsen, Abu Sesay
SUBJECTS: Ultra Wideband
TYPE: Conference Publication
PUBLISHED: 2004

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