Title :
Adaptive Time-Frequency Codes for Ultra-Wideband
Author :
Lowe, Darryn ; Huang, Xiaojing
Author_Institution :
Univ. of Wollongong, Wollongong
Abstract :
This paper investigates inter-piconet interference (IPI) in the multi-band orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) standard. IPI is caused when the time-frequency codes (TFCs) that delineate MB-OFDM piconets collide. An upper-bound on the severity of the IPI problem is obtained through a theoretical analysis of data-rate-speciflc punctured convolutional codes. Using these results, several methods for adaptive TFCs are proposed and analyzed. Comprehensive simulation results show how packet error rates (PERs) for simultaneous operating piconets (SOPs) can be improved by up to 2 dB by enabling adaptive TFCs at the transmitter. Several combinations of data rate, TFC, channel model and interferer power are studied.
Keywords :
OFDM modulation; adaptive codes; convolutional codes; interference (signal); ultra wideband communication; MB-OFDM; adaptive time-frequency codes; data-rate-speciflc punctured convolutional codes; interpiconet interference; multiband orthogonal frequency division multiplexing; packet error rates; simultaneous operating piconets; transmitter; ultrawideband; Convolutional codes; Diversity methods; FCC; Interference; Interleaved codes; OFDM; Personal area networks; Time frequency analysis; Transmitters; Ultra wideband technology;
Conference_Titel :
Wireless and Mobile Communications, 2007. ICWMC '07. Third International Conference on
Conference_Location :
Guadeloupe
Print_ISBN :
0-7695-2796-5
Electronic_ISBN :
0-7695-2796-5
DOI :
10.1109/ICWMC.2007.15
