Title :
OFDM frame synchronization in slotted ALOHA mobile communication systems
Author :
Chung, Jong-Moon ; Liu, Dongfang ; Ramasamy, Krishnaveni ; Varadarajan, Sriram
Author_Institution :
Sch. of Electr. & Comput. Eng., Oklahoma State Univ., Stillwater, OK, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
Wireless application of orthogonal frequency division multiplexing (OFDM) is gaining much attention as a modulation technique for high speed data transmission in various applications due to its good properties against frequency selective fading, intersymbol interference (ISI), and intercarrier interference (ICI). However there are still several issues related to synchronization and multiple access that require more research. We investigate the performance of OFDM transmission through slotted ALOHA multiple access and compare the results to unslotted ALOHA OFDM systems. The results show that the OFDM slotted ALOHA technique has advantages in SNR, throughput, and frame synchronization performance compared to unslotted ALOHA with OFDM, which suggests slotted ALOHA as a candidate for multiple access for OFDM wireless communication applications
Keywords :
OFDM modulation; access protocols; adjacent channel interference; data communication; fading channels; interference suppression; intersymbol interference; mobile radio; synchronisation; telecommunication traffic; ICI; ISI; OFDM; SNR; frame synchronization; frequency selective fading; high speed data transmission; intercarrier interference; intersymbol interference; modulation; multiple access; orthogonal frequency division multiplexing; performance; slotted ALOHA; throughput; wireless communication; AWGN; Application software; Fading; Frequency synchronization; Intersymbol interference; Laboratories; Mobile communication; OFDM modulation; Throughput; Wireless LAN;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956421
