Title :
A study of OFDM parameters for high data rate radio LANs
Author :
Lacroix, Dominique ; Castelain, Damien
Author_Institution :
France Telecom, CNET, Cesson-Sevigne, France
Abstract :
This paper presents the technical advantages of using a multicarrier OFDM modulation for high data rate wireless LANs. It investigates a way of choosing the key parameters of a coded-OFDM (COFDM) system dedicated to such networks. As an example, the broadband radio access network called HIPERLAN/2 is studied. The comparison of two differential subcarrier modulation schemes specific to OFDM modulation, in the frequency domain and in the time domain, is more particularly detailed, through simulations and a theoretical analysis. Furthermore, considering the necessity for the system to be robust to noise as well as to frequency offset, turbo-codes are proposed. Information on FFT complexity is finally provided
Keywords :
OFDM modulation; broadband networks; computational complexity; data communication; fast Fourier transforms; frequency-domain analysis; modulation coding; radio access networks; time-domain analysis; trellis codes; wireless LAN; Doppler effect; FFT complexity; HIPERLAN/2; OFDM parameters; broadband radio access network; coded-OFDM COFDM system; differential subcarrier modulation; echo length; frequency domain; frequency offset robustness; high data rate radio LAN; multicarrier OFDM modulation; noise robustness; simulation results; symbol duration; time domain; turbo-codes; Bandwidth; Delay; Fading; Germanium; Local area networks; OFDM modulation; Radio access networks; Robustness; Turbo codes; Wireless LAN;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851290
