Practical Propagation Channel Robust BLER Estimation in the OFDM/TDMA and OFDMA Broadband Wireless Access Networks

In this paper we propose a practical propagation channel robust algorithm of the block error rate estimation in the orthogonal frequency division multiplexing with the time division multiple access and the orthogonal frequency division multiple access broadband wireless access networks. We estimate the block error rate as a function of two variables, that is, the average signal-to-noise ratio (SNR) and the normalized root mean square value of the SNR. We calculate the average and the root mean square values of the SNR within the set of the SNR per subcarrier values within the coding block our block error rate estimation algorithm adds more flexibility to the link adaptation algorithms. Moreover, it increases robustness of the link adaptation in the unknown propagation channels.