Title :
Performance of UWB time-hopping spread-spectrum impulse radio in multipath environments
Author :
Yue, Guangong ; Ge, Lijia ; Li, Shaqian
Author_Institution :
Nat. Commun. Lab., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
This paper presents the theoretical analysis of BER performance for ultra wideband (UWB) impulse radio systems in multipath propagation channels. Both time-hopping pulse-position-modulation (TH-PPM) and the time-hopping pulse-amplitude-modulation (TH-PAM) are considered. The closed-form BER formulas are derived. The impact of system parameters on the BER performance is discussed. It is demonstrated that the impact of multipath propagation on TH-PAM UWB radio is different from that on TH-PPM UWB radio, which is analyzed in detail. For the TH-PPM scheme, the multipath propagation time-delay may lead to unbalanced BER over "0"-"1" in some particular multipath channels. For the TH-PAM scheme, however, there exists no such unbalance of BER over "0"-"1". In typical deterministic multipath environment, to obtain the same BER performance of 10-4, the required SNR for TH-PPM scheme is about 7dB larger than that for TH-PAM.
Keywords :
amplitude modulation; broadband networks; delays; error statistics; multipath channels; pulse position modulation; radiowave propagation; BER formulas; SNR; multipath propagation channels; signal-to-noise ratio; time-delays; time-hopping pulse-amplitude-modulation; time-hopping pulse-position-modulation; ultra wideband impulse radio systems; Bit error rate; Fading; Modulation; Multipath channels; Performance analysis; Propagation delay; Propagation losses; Spread spectrum communication; Ultra wideband technology; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1207101
