Title :
Interference Resistant Adaptive Threshold Acquisition Algorithm for DS-UWB Systems
Author :
Chen, Jun ; Zhou, Zheng
Author_Institution :
Wireless Network Lab, Beijing Univ. of Posts & Telecommun.
Abstract :
Ultra-wide band (UWB) radio transmits data using nanosecond level impulses, typically work in dense multi-path environment. Acquisition performance decreases rapidly due to serious inter-symbol interference (ISI) caused by those complex channel with relatively large delay spread. An interference resistant adaptive threshold acquisition algorithm (IR-ATAA) for DS-UWB systems is described and analyzed. The decision threshold changes automatically adapting to the signal to noise ratio (SNR) at time of comparison. Due to this stratagem, the probability of acquisition PACQ improved a lot. The simulation results also indicate the superiority of IR-ATAA over the fixed threshold acquisition algorithm
Keywords :
interference suppression; intersymbol interference; multipath channels; spread spectrum communication; ultra wideband communication; DS-UWB systems; ISI; SNR; delay spread; dense multi-path environment; direct sequence ultra-wide band radio; fixed threshold acquisition algorithm; inter-symbol interference; interference resistant adaptive threshold acquisition algorithm; nanosecond level impulses; probability of acquisition; signal to noise ratio; Adaptive signal detection; Adaptive systems; Correlators; Delay; Hardware; Intersymbol interference; Signal detection; Signal processing; Signal to noise ratio; Wireless networks; Acquisition; Adaptive-Threshold; DS; UWB;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-9391-0
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2006.1683281
