Title :
Power spectral density and in-band interference power of UWB signals at narrowband systems
Author :
Ye, Zhenzhen ; Madhukumar, A.S. ; Chin, Francois
Author_Institution :
High Performance Coumput. for Eng. Syst., Nat. Univ. of Singapore, Singapore
Abstract :
Ultra-wideband (UWB) technology is one of the promising solutions for short-range indoor wireless communication applications. UWB systems spread the transmitted signal power over an extremely large frequency band, and the power spectral density of the signal is very low. Due to the wide bandwidth of the transmitted signal, UWB signal energy will spread over the frequency bands allocated to other radio systems. In order to evaluate the effects of UWB system to narrowband systems (such as IEEE802.11a wireless LAN) in its overlay band, it is important to understand and quantify the power spectral density (PSD) of UWB signal. In this paper, a detailed analysis on the PSD of direct sequence coded UWB (DS-UWB) signal is presented. The theoretical and simulation results reveal that the interfering DS-UWB power can be reduced by regulating UWB chip rate, pulse shape, pulse width and scrambling codes in the frequencies of victim narrowband systems.
Keywords :
bandwidth allocation; broadband networks; indoor radio; pseudonoise codes; radio receivers; random codes; spread spectrum communication; DS-UWB; PSD; direct sequence coded ultra-wideband technology; in-band interference power; narrowband system; overlay band; power spectral density; radio system; short-range indoor wireless communication; signal power transmission; Bandwidth; Frequency; Interference; Narrowband; Pulse shaping methods; RF signals; Radio spectrum management; Space vector pulse width modulation; Ultra wideband technology; Wireless communication;
Conference_Titel :
Communications, 2004 IEEE International Conference on
Print_ISBN :
0-7803-8533-0
DOI :
10.1109/ICC.2004.1313207
