Equalization requirements for 30 Mbps indoor wireless data transmission
- 23 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 1, 71-75 vol.1
- https://doi.org/10.1109/vetec.1996.503410
Abstract
The next step in the evolution of wireless local area networks (LANs) is an increase in the data rate from the present rates of a few Mbps to tens of Mbps. As a result of the faster rates the normalized delay-spread increases and simple modulation and demodulation has to be augmented by adaptive equalization. This paper investigates the equalizer requirements of a 4-QAM based system operating at a data rate of 30 Mbps. Through a series of simulations, using a large set of randomly generated channels with ensemble-averaged rms delay spreads of /spl tau//sub rms/=25 ns, 50 ns, 100 ns and 150 ns, the minimum number of taps necessary to guarantee 99% availability (1% outage) is reported. Additionally, the paper presents a discussion on the effects of changing the location of the reference tap (gain-tap) of the equalizer on the overall system performance.Keywords
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