Energy efficient binary PPM/code-multiplexed transmitted-reference multi-user UWB system

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Muhammad Gufran Khan, Benny Sällberg, Jörgen Nordberg, Ingvar Claesson
Title: Energy efficient binary PPM/code-multiplexed transmitted-reference multi-user UWB system
Conference name: IEEE International Conference on Ultra-Wideband, ICUWB
Year: 2011
Pagination: 615-619
ISBN: 978-145771764-2
Publisher: IEEE
City: Bologna
URI/DOI: 10.1109/ICUWB.2011.6058922
ISI number: 000302462400127
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Electrical Engineering (Sektionen för ingenjörsvetenskap - Avd. för elektroteknik)
School of Engineering S-371 79 Karlskrona
+46 455 38 50 00
Language: English
Abstract: This paper presents a combined binary pulse position modulation (BPPM)/code-multiplexed transmitted-reference (CM-TR) ultra wideband (UWB) system. The low complexity CM-TR UWB is not energy efficient as one half of the energy is used to transmit reference pulses and, even at low-to-medium data rates, it suffers from strong multi-user interference (MUI) and inter-frame interference (IFI). Keeping the information rate constant, the combined BPPM/CM-TR UWB system utilizes 3 dB less energy per bit as compared to the CM-TR system and achieves relatively longer silent periods between the pulses, which not only mitigate the IFI but also decrease the MUI due to less collisions with other asynchronous users. In the high SNR region, where the effect of IFI and MUI severely degrades the bit-error-rate (BER) performance of the multiuser CM-TR system, simulation results verify that the multiuser BPPM/CM-TR outperforms the multiuser CM-TR system.
Subject: Signal Processing\General