Title :
Generalized frequency hopping OFDMA through unknown frequency-selective multipath channels
Author_Institution :
Dept. of ECE, Minnesota Univ., Minneapolis, MN
Abstract :
The generalized frequency hopping (GFH) OFDMA system developed in this paper permeates FH benefits to multicarrier CDMA transmissions through unknown frequency-selective multipath channels. No single user suffers from consistent fading effects and multiuser interference is eliminated by design. Constellation-irrespective channel identifiability is guaranteed, and a host of blind channel estimation algorithms are developed, trading off complexity with performance. An important variant corresponding to fast-hopping is also addressed. Performance analysis and simulation results illustrate the merits of GFH-OFDMA relative to conventional OFDMA and long code CDMA with RAKE reception
Keywords :
OFDM modulation; code division multiple access; codes; frequency division multiple access; frequency hop communication; interference suppression; multipath channels; multiuser channels; parameter estimation; radiofrequency interference; spread spectrum communication; DS-CDMA; GFH-OFDMA; RAKE reception; blind channel estimation algorithms; complexity; constellation-irrespective channel identifiability; conventional OFDMA; fast-hopping; frequency-selective multipath channels; generalized frequency hopping OFDMA; long code CDMA; multicarrier CDMA transmissions; multiuser interference elimination; performance analysis; simulation results; Analytical models; Baseband; Blind equalizers; Fading; Finite impulse response filter; Interference elimination; Interference suppression; Multiaccess communication; Multipath channels; Performance analysis;
Conference_Titel :
Wireless Communications and Networking Confernce, 2000. WCNC. 2000 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-6596-8
DOI :
10.1109/WCNC.2000.904600
