Title :
Effect of Doppler spread on OFDM based UWB system
Author :
Capoglu, Ilker Rafet ; Li, Ye ; Swami, Ananthram
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
We investigate the inter-carrier interference (ICI) caused by relative motion between transmitter and receiver in orthogonal frequency division multiplexing (OFDM) based ultra wide-band (UWB) communications. Since the Doppler shift is proportional to the subcarrier frequency, the time-selective fading is subcarrier dependent. An exact expression as well as bounds are derived for the degradation in performance, as measured by signal-to-interference ratio (SIR). A design example is given to illustrate the concepts developed In the work.
Keywords :
Doppler shift; OFDM modulation; adjacent channel interference; fading channels; radio receivers; radio transmitters; ultra wideband communication; Doppler shift; ICI; OFDM; UWB; inter-carrier interference; orthogonal frequency division multiplexing; subcarrier frequency; time-selective fading; transmitter-receiver motion; ultra wide-band communication; Collaboration; Delay; Doppler shift; Laboratories; Milling machines; Narrowband; OFDM; Powders; Scattering; Wideband;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2004 IEEE 5th Workshop on
Print_ISBN :
0-7803-8337-0
DOI :
10.1109/SPAWC.2004.1439221
