Abstract
In this paper, an adaptive packet acquisition performance of a DS/SSMA packet radio system is analyzed and simulated in a frequency-selective Rayleigh fading channel. The frequency-selective fading process is assumed to be a WSSUS (wide sense stationary uncorrelated scattering) model which is typical for a satellite and mobile radio communications. The performance is evaluated in terms of packet error probability. In the adaptive packet acquisition scheme, an auxiliary training sequence is placed within the data packet to estimate time-varying channel state. From the simulation results, it is confirmed that the adaptive acquisition scheme significantly improves packet error performance compared to the fixed acquisition scheme, especially, for the case of low Doppler frequency. The analysis in this paper can be applied to the design of a DS/SSMA packet radio system.
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