Title :
Performance of an OFDM-TDMA mobile communication system
Author :
Rohling, H. ; Grünheid, R.
Author_Institution :
Inst. of Telecommun., Tech. Univ. Braunschweig, Germany
fDate :
28 Apr-1 May 1996
Abstract :
The multicarrier transmission technique (OFDM) is considered in combination with a TDMA/TDD multiple access scheme for a cellular mobile communication system. Performance analysis is presented for the uncoded and coded (TCM) case. It is shown that OFDM systems have a large potential concerning the flexible allocation of the total given bandwidth to different users. This flexibility can be exploited to adapt to the impairments of the radio channel, thus increasing the overall performance. Two methods, namely (1) a simple principle to leave out weak subcarriers, and (2) the individual modulation of each subcarrier (adaptive modulation) are studied (for the up-/downlink case in a frequency selective and time-variant radio channel), and results with respect to throughput and BER performance are discussed
Keywords :
cellular radio; coding errors; encoding; error statistics; frequency division multiplexing; time division multiple access; time-varying channels; trellis coded modulation; BER performance; OFDM systems; OFDM-TDMA mobile communication system; TCM; TDMA/TDD; adaptive modulation; bandwidth allocation; cellular mobile communication system; coded system; frequency selective radio channel; multicarrier transmission technique; performance analysis; radio channel; subcarriers; throughput; time variant radio channel; uncoded system; Bandwidth; Bit error rate; Delay; Mobile communication; Modems; OFDM; Rayleigh channels; Receivers; Silicon compounds; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3157-5
DOI :
10.1109/VETEC.1996.504026
