Title :
Frequency-Domain Turbo Equalization for Single Carrier Mobile Broadband Systems
Author :
Dong, Liang ; Zhao, Yao
Author_Institution :
Dept. of Electr. & Comput. Eng., Western Michigan Univ., Kalamazoo, MI
Abstract :
This paper investigates mobile broadband communications, which undergo time-varying radio channels with large multipath delay spread. Space-time block transmission and single carrier modulation are adopted at the transmitter to combat the inter-symbol interference resulted from, the multipath delay. The single carrier modems with frequency-domain equalization have similar performance and complexity as orthogonal frequency-division multiplexing, yet less sensitive to radio frequency impairments. At the receiver, we propose the turbo equalization that consists of a minimum mean-square error equalizer in the frequency domain and a channel decoder. In order to cope with the time-varying characteristics of the mobile channel, the received data is partitioned into blocks for the linear equalizer, and then combined as a decoding frame for the decoder. Simulation results show good performance of the proposed scheme with feasible computational complexity
Keywords :
OFDM modulation; block codes; broadband networks; channel coding; decoding; equalisers; frequency-domain analysis; intersymbol interference; least mean squares methods; mobile communication; space-time codes; time-varying channels; turbo codes; wireless channels; channel decoder; frequency-domain turbo equalization; intersymbol interference; minimum mean-square error; mobile broadband communication; multipath delay spread; orthogonal frequency-division multiplexing; single carrier modulation; space-time block transmission; time-varying radio channel; Broadband communication; Decoding; Delay; Equalizers; Frequency division multiplexing; Interference; Mobile communication; Modems; Radio frequency; Radio transmitters;
Conference_Titel :
Military Communications Conference, 2006. MILCOM 2006. IEEE
Conference_Location :
Washington, DC
Print_ISBN :
1-4244-0617-X
Electronic_ISBN :
1-4244-0618-8
DOI :
10.1109/MILCOM.2006.302525