Title :
Analysis on Performance Improvement in Multiuser UWB System Under Imperfect Power Control
Author :
Lin Di ; Wu Xuan-li ; Sha Xue-jun
Author_Institution :
Commun. Res. Center, Harbin Inst. of Technol., Harbin
Abstract :
Power control techniques are adopted in narrow-band systems to overcome near-far effects by varying transmitted power levels so that all signals are received with equal power level. However, since the transmission data rate is too high in ultra-wideband (UWB) in which multimedia communication is desired to realize, it is impossible to accomplish perfect power control with current technologies and hardware, and therefore performance of UWB systems will be reduced. A model of UWB system under imperfect power control is proposed, and system performance with this model is analyzed. Since system performances are different by utilizing different waveforms, to improve the performance, an optimal waveform is adopted in UWB system, and the improvement of system performance is shown by comparing to the performance using Gaussian waveform.
Keywords :
multimedia communication; power control; telecommunication control; ultra wideband communication; Gaussian waveform; imperfect power control techniques; multimedia communication; multiuser UWB system; narrow-band systems; performance improvement; ultra wideband systems; AWGN; Binary phase shift keying; Bit error rate; Hardware; Interference; Performance analysis; Power control; Power system modeling; System performance; Transmitters;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.258
