Author_Institution :
Univ. of South Florida, Tampa, FL, USA
Abstract :
This paper develops a signaling system for high bit rate wireless LANs made possible by a new class of signaling pulses. Called OWSS pulses, they are generated through a combination of orthogonal wavelet-division multiplexing (OWDM) and spread-spectrum concepts. Specifically, they are derived from the OWDM pulses by spreading them in the wavelet domain, using a suitable family of PN codes. Unlike the pulses used in OFDM, TDMA, and even OWDM, these new pulses have both a wide time support and a wide frequency support. Some of the advantages realized are: (a) single or multiple user capability, (b) inherent frequency diversity for overcoming frequency selective fading, (c) continuously pipelined operation (in contrast to OFDM), and (d) a high bandwidth (BW) efficiency, which is about twice that for DS-CDMA (assuming rectangular chips for DS-CDMA). The target bit rates for this work range from 100 Mbps upwards, in the 5.7 GHz band
Keywords :
diversity reception; fading channels; multi-access systems; multiuser channels; pseudonoise codes; spread spectrum communication; telecommunication signalling; wavelet transforms; wireless LAN; 100 Mbit/s; 5.7 GHz; OWDM pulses; OWSS multiple-access system; OWSS pulses; PN codes; frequency diversity; frequency selective fading; frequency support; full-tree wavelet filters; high bandwidth efficiency; high bit rate wireless LAN; multi-access system; orthogonal wavelet pulses; orthogonal wavelet-division multiplexing; pipelined operation; signaling pulses; signaling system; spread-spectrum communication; wavelet domain; wireless LAN; Bit rate; Communication system signaling; Frequency diversity; Multiaccess communication; OFDM; Pulse generation; Spread spectrum communication; Time division multiple access; Wavelet domain; Wireless LAN;
