Title :
Performance of an optimally spaced PPM ultra-wideband system with direct sequence spreading for multiple access
Author :
Venkatesan, Vinod ; Liu, Huaping ; Nilsen, Curt ; Kyker, Ron ; Magaña, Mario E.
Author_Institution :
Sch. of EECS, Oregon State Univ., Corvallis, OR, USA
Abstract :
We analyze the error performance of an ultra-wideband (UWB) system with pulse position modulation (PPM) for data modulation and direct sequence (DS) spreading for multiple access in indoor lognormal fading channels. A RAKE receiver is used to combine a subset of the resolvable multipath components using the maximal ratio combining technique. Inter-path and multiple-access interferences are modeled and incorporated into the BER expressions. As two special cases, the performances of the optimally-spaced and orthogonal signaling schemes are compared. The presented results allow comprehensive evaluation of system performances with any combination of parameters.
Keywords :
data communication; diversity reception; error statistics; fading channels; indoor radio; multi-access systems; multipath channels; pulse position modulation; radio receivers; radiofrequency interference; spread spectrum communication; telecommunication signalling; BER; PPM; RAKE receiver; UWB system; direct sequence spreading; error performance; indoor channels; inter-path interference; lognormal channels; lognormal fading channels; maximal ratio combining; multipath components; multiple access; multiple-access interference; optimally-spaced system; orthogonal signaling; pulse position modulation; ultra-wideband system; Bit error rate; Diversity reception; Error analysis; Fading; Multipath channels; Multiple access interference; Performance analysis; Pulse modulation; Signal resolution; Ultra wideband technology;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285088
