Title :
Multi-user capacity of M-ary PPM ultra-wideband communications
Author :
Li Zhao ; Haimovich, A.M.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA
Abstract :
We study the information theoretic capacity of M-ary pulse position modulation (PPM) ultra-wideband (UWB) communications for the multi-user channels. Under certain assumptions, the multiple-access interference component at the receiver is modeled as Gaussian. An expression for the signal-to-noise ratio is developed for UWB utilizing rectangular pulses. The information theoretic capacity of the UWB system is studied as a function of number of users. A closed form expression and a lower bound are found for the case of binary PPM. An upper bound on the aggregate capacity is found for the case of large number of users.
Keywords :
broadband networks; channel capacity; information theory; multiuser channels; pulse position modulation; radio networks; radiofrequency interference; Gaussian interference; M-ary PPM ultra-wideband communications; aggregate capacity; binary PPM; channel capacity; closed form expression; information theoretic capacity; lower bound; multi-user channels; multiple-access interference; multiuser capacity; receiver; rectangular pulses; upper bound; AWGN; Additive white noise; Bandwidth; Gaussian noise; Multiple access interference; Pulse modulation; Signal to noise ratio; Ultra wideband communication; Ultra wideband technology; Upper bound;
Conference_Titel :
Ultra Wideband Systems and Technologies, 2002. Digest of Papers. 2002 IEEE Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-7496-7
DOI :
10.1109/UWBST.2002.1006341
