Multicode ultra-wideband scheme using chirp waveforms

被引：45

作者：

Liu, HP ^{[1
]}

机构：

[1] Oregon State Univ, Sch Elect Engn & Comp Sci, Corvallis, OR 97331 USA

来源：

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS | 2006年 / 24卷 / 04期

关键词：

chirp signals; lognormal fading channels; multicode signaling; ultra-wideband;

D O I：

10.1109/JSAC.2005.863879

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We propose an ultra-wideband (UWB) scheme that employs chirp waveforms. Signals satisfying the Federal Communications Commission (FCC) requirements for UWB applications are formed by using multiple linear frequency-modulated (chirped) waveforms. This scheme has the merits of both the multiband orthogonal frequency-division multiplexing (OFDM) UWB scheme such as continuous-wave transmission, and the pulsed UWB scheme, such as accurate timing, imaging capabilities, and rich frequency diversity. Another advantage unique to the proposed scheme is that completely passive, low-cost implementation of matched filters/correlators using surface acoustic wave devices is possible, whereas OFDM-UWB must rely on high-speed sampling combined with powerful digital signal processing. We present the details of chirp waveforms for UWB signaling, explore the correlation properties of the multicodes, and study the receiver structures. We also derive the error performance of the proposed scheme in indoor lognormal fading environments and discuss issues with the proposed scheme.

引用

页码：885 / 891

页数：7

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