BER of frequency adaptive radio telecommunication system with sounding signals

Frequency adaptation is one of the most powerful techniques which radio telecommunications can use to obtain suitable throughput when data transmission over radio channels with heavy fading and power interference. As adaptive transmission requires estimation of communication quality for each allocated channel, we consider the adaptive system with special sounding signals and determine how the inaccuracy of the channel estimation influences the communication quality. Our findings give also the dependence of the BER on the time elapsed after the moment of sounding and the influence of power narrow band interference on the BER.