Title :
Improved performance of a random OFDMA mobile communication system
Author :
Nogueroles, R. ; Bossert, M. ; Donder, A. ; Zyablov, V.
Author_Institution :
Dept. of Inf. Technol., Ulm Univ., Germany
Abstract :
In this paper we consider the uplink performance of an OFDMA (orthogonal frequency division multiple access) system for mobile communications. First, we describe the random OFDMA system which is based on MC-FDMA (multicarrier FDMA), and where each user has a set of randomly selected subchannels. We also describe the performance criteria considered for the evaluation of this system and present different system implementations depending on the level of block synchronization assumed. In the last section we describe different methods for improving the system performance, one based on different receiver configurations and another based on different sets of subchannels per user depending on the traffic load. We also show some simulation results for the performance of the system under the different assumptions
Keywords :
frequency division multiple access; land mobile radio; synchronisation; telecommunication traffic; MC-FDMA; block synchronization; mobile communication system; multicarrier FDMA; orthogonal frequency division multiple access; random OFDMA system; randomly selected subchannels; receiver configurations; simulation results; traffic load; uplink performance; Broadband communication; Data communication; Frequency conversion; Frequency division multiaccess; Information technology; Mobile communication; Multimedia communication; OFDM; System performance; Telecommunication traffic;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.686210
