On the Benefits of MAI-Plus-Noise Whitening in TH-BPSK IR-UWB Systems

Author

Yazdani, Hassan ; Rabiei, A.M. ; Beaulieu, Norman C.

Author_Institution

Sch. of Electr. & Comput. Eng., Univ. of Tehran, Tehran, Iran

Volume

13

Issue

7

fYear

2014

fDate

Jul-14

Firstpage

3690

Lastpage

3700

Abstract

Multiaccess interference (MAI)-plus-noise whitening for detecting impulse radio ultra-wide bandwidth (IR-UWB) signals transmitted over ideal free-space and the IEEE 802.15.3a channels is considered. IR-UWB signals are very sparse in time and, thus, MAI-plus-noise whitening cannot introduce intersymbol interference (ISI) in IR-UWB systems operating on an ideal free-space channel. In addition, ISI in UWB multipath fading channels can be eliminated by a proper choice of the frame duration. An analytical expression for the signal-to-interference-plus-noise ratio (SINR) of IR-UWB systems after MAI-plus-noise whitening is derived and the SINR improvement due to whitening is investigated. It is shown that whitening can improve the performance of a variety of the well-known IR-UWB receivers, viz., soft-limiting, P-order metric, optimal, and the conventional matched filter receivers. It is also observed that MAI-plus-noise whitening can improve the overall SINR of the system and, thus, decrease the complexity of Rake receivers through reducing the number of their processing branches.

Keywords

fading channels; interference (signal); multi-access systems; multipath channels; phase shift keying; radio receivers; ultra wideband communication; IEEE 802.15.3a channels; IR-UWB signals; ISI; MAI-plus-noise whitening; Rake receivers; SINR improvement; TH-BPSK IR-UWB systems; UWB multipath fading channels; ideal free-space channel; impulse radio ultrawide bandwidth signals; intersymbol interference; multiaccess interference-plus-noise whitening; signal-to-interference-plus-noise ratio; Channel models; Fading; Interference; Multipath channels; Receivers; Signal to noise ratio; Wireless communication; Impulse radio (IR); interference-plus-noise whitening; multipath fading channel; multiple access interference (MAI); power spectral density (PSD); rake receiver; ultra-wide bandwidth (UWB); whitening matched filter (WMF);

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2014.2314091

Filename

6779692