Adaptive rate coding in frequency-hopped random access communication systems

An adaptive rate coding scheme in a slotted frequency-hopped (FH) random access communication system is considered. Each transmitter-receiver pair selects the optimal code rate for each estimated channel traffic level so that the normalized channel throughput can be maximized. An analysis that accounts for the fact that the traffic estimation is inaccurate is presented, and an adaptive rate coding scheme that is quite robust to the accuracy of the traffic estimation is proposed. The effect of the reliability of the side information and the accuracy of the traffic estimation on the normalized throughput are examined