Novel modulation scheme and six-port based RAKE receiver for DS-UWB

Author

Perez-Duenas, J. ; Wanguemert-Perez, J. Gonzalo ; Molina-Fernandez, I.

Author_Institution

Dipt. de Ing. de Comun., Univ. de Malaga, Malaga, Spain

Volume

8

Issue

7

fYear

2009

fDate

7/1/2009 12:00:00 AM

Firstpage

3628

Lastpage

3633

Abstract

This paper describes a novel modulation scheme for direct sequence ultra-wideband systems (DS-UWB), which have been considered a type of physical layer (PHY) suitable for high-speed wireless personal area networks (WPANs) in IEEE 802.15.3a. In DS-UWB systems, rake reception is essential to capture dispersive energy and to compensate interference generated by multipath fading. Simulation results show that the proposed modulation, named QBOK (quadrature binary orthogonal keying), outperforms the existing 4-ary biorthogonal keying (4-BOK) scheme under multipath environments in terms of bit error rate (BER) whilst allowing more simultaneous users. Additionally, a new correlator and I-Q demodulator structure based on the well-known six-port architecture is described from a theoretical perspective. Additionally, its application as RF frontend in RAKE receivers with analog emphasis is also investigated in this paper, resulting in reduction of the amount of digital signal processing, easing hardware requirements.

Keywords

binary codes; channel coding; demodulation; error statistics; fading channels; modulation coding; orthogonal codes; personal area networks; quadrature phase shift keying; radio receivers; radiofrequency interference; spread spectrum communication; ultra wideband communication; BER; DS-UWB; I-Q demodulator structure; QBOK; RF frontend; WPAN; binary phase shift keying; bit error rate; digital signal processing; direct sequence ultra-wideband system; direct-sequence spread spectrum technology; high-speed wireless personal area network; interference compensation; modulation scheme; multipath fading channel; quadrature binary orthogonal keying; six port-based RAKE receiver; Bit error rate; Correlators; Dispersion; Energy capture; Fading; Interference; Multipath channels; Physical layer; Ultra wideband technology; Wireless personal area networks; DS-UWB, QBOK modulation, RAKE receiver, six-port architecture.;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2009.080576

Filename

5165326