All Volumes (2001-2008)

Volume

Volume V, 2006

Document Type

Article

Publication Date

2006

Abstract

Following FCC approval of Ultra-Wide Band (UWB) radio rules for commercial applications in 2002, a UWB radio physical layer standard is currently under development within the IEEE 802 LAN/MAN Standard Committee. Although the UWB transmitter and UWB band are spelled out by the FCC, neither UWB signal forms nor modulation schemes are defined by the regulations [1]. This paper illustrates two types of impulse UWB radio modulation systems and their simulation performance. They are direct sequence UWB (DS-UWB) and time modulated (TM- UWB) or so called time hopping UWB (TH-UWB). Unique ways of coding and positioning the impulses, as in Transmitted- Reference Delay (TRD) modulation and Pulse-Position Modulation (PPM), can result in the simple UWB radio architectures. Systems of TRD for DSUWB and PPM for TH-UWB are simulated under the same data and under the same AWGN channel conditions. TRD-DS-UWB system presents superior performance over PPM- TH-UWB system, which is shown in the comparison chart of the paper. The simulation was verified with ideal calculated performance for TRD modulation. The UWB applications are also discussed.

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