Spectral efficient modulation schemes in a SFH-TDMA orthogonal frequency division multiplexing (OFDM) wireless communication system to support advanced services

Author

Böhnke, Ralf ; Suzuki, Mitsuhiro ; Sakoda, Kazuyuki

Volume

3

fYear

1998

fDate

18-21 May 1998

Firstpage

2202

Abstract

An OFDM based wireless communication system with `slow frequency hopping´ (SFH) and TDMA is proposed. SFH-TDMA was found to be superior in performance compared to CDMA regarding intra-cell interference and simple TDMA regarding interference and frequency diversity. OFDM supports a high spectral efficiency and superior performance in various channel profiles without the need for complex equalising in any delay profile. Modulation schemes were developed to support specific C/I conditions for different environments (e.g. office, vehicular) and optimise the system capacity, spectral efficiency and data throughput. We compare coherent (4-PSK, 16-QAM and 64-QAM) and non-coherent (DQPSK, D8PSK, 16-DAPSK) modulation schemes in combination with variable forward error correction to support advanced services. Results of the research are proposed for the standardisation of the 3^rd generation mobile communication system in Europe and Japan

Keywords

OFDM modulation; channel allocation; channel capacity; code division multiple access; diversity reception; forward error correction; frequency hop communication; land mobile radio; phase shift keying; quadrature amplitude modulation; radiofrequency interference; time division multiple access; 16-DAPSK; 16-QAM; 4-PSK; 64-QAM; C/I conditions; D8PSK; DQPSK; Europe; Japan; OFDM wireless communication system; SFH-TDMA; channel allocation; channel profiles; coherent modulation; data throughput; delay profile; frequency diversity; high spectral efficiency; intra-cell interference; noncoherent modulation; orthogonal frequency division multiplexing; performance; slow frequency hopping; standardisation; system capacity; third generation mobile communication system; variable forward error correction; Delay; Frequency diversity; Interference; Multiaccess communication; OFDM modulation; Quadrature phase shift keying; Spread spectrum communication; Throughput; Time division multiple access; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1998. VTC 98. 48th IEEE

Conference_Location

Ottawa, Ont.

ISSN

1090-3038

Print_ISBN

0-7803-4320-4

Type

conf

DOI

10.1109/VETEC.1998.686148

Filename

686148