Title :
OFDM for data communication over mobile radio FM channels. II. Performance improvement
Author :
Casas, E.F. ; Leung, Clement
Author_Institution :
Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC, Canada
fDate :
4/1/1992 12:00:00 AM
Abstract :
For pt.I see ibid., vol.39, no.5, p.783-93 (1991). The performance of an orthogonal frequency-division multiplexing (OFDM)/frequency modulation (FM) system for data communication over Rayleigh-fading mobile radio channels was analyzed in pt.I. The effects of forward error correction, switching diversity, automatic gain control (AGC), and squelch are studied. It is shown that OFDM/FM works well with switching diversity because OFDM can average out the transients created by switching between antennas. It is also found that the independent error assumption can be used to predict the distribution of the number of errors in a word. The use of squelch produced a small (about 1 dB) performance improvement, whereas the use of AGC provided negligible improvement
Keywords :
automatic gain control; data communication systems; error correction codes; fading; frequency division multiplexing; frequency modulation; mobile radio systems; telecommunication channels; AGC; FEC; OFDM/FM; Rayleigh-fading mobile radio channels; automatic gain control; data communication; forward error correction; frequency modulation; independent error assumption; orthogonal frequency-division multiplexing; squelch; switching diversity; Communication switching; Data communication; Forward error correction; Frequency division multiplexing; Frequency modulation; Gain control; Land mobile radio; OFDM; Performance analysis; Rayleigh channels;
Journal_Title :
Communications, IEEE Transactions on
