Title :
Hybrid wavelet/spread-spectrum system for broadband wireless LANs
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. 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 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 and up, in the 5.7 GHz band
Keywords :
code division multiple access; diversity reception; fading; pseudonoise codes; spread spectrum communication; wavelet transforms; wireless LAN; 100 Mbit/s; 5.7 GHz; DS-CDMA; PN codes; bit rates; broadband wireless LANs; continuously pipelined operation; frequency diversity; frequency selective fading; frequency support; hybrid wavelet/spread-spectrum system; multiple user capability; signaling pulses; signaling system; time support; Bit rate; Communication system signaling; Fading; Frequency diversity; Multiaccess communication; OFDM; Spread spectrum communication; Time division multiple access; Wavelet domain; Wireless LAN;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.922297
