On BER evaluation of a Regional Anti-Jamming Subcarrier strategy for MIMO-OFDMA systems

The goal of the present study is to evaluate the Bit Error Rate (BER) of a MIMO-OFDMA multicellular network, when the Regional Anti-Jamming Subcarrier Scavenging (RAJSS) strategy is employed. Throughput and power consumption per mobile terminal (MT) are provided as output metrics, and compared to other subcarrier allocation strategies. The system platform, which is compatible with all studied strategies, carries out a sufficient number of independent Monte Carlo (MC) simulations for different network orientations. Each MC comprises two stages. In the first stage, base stations (BSs) assign their available subcarriers to the MTs without any Channel State Information (CSI), and in the last stage the MTs try to fully recover the transmitted signal. Results indicate that the RAJSS strategy outperforms the other studied strategies, in terms of BER-Throughput gain and algorithmic fairness. However, algorithmic complexity of the RAJSS algorithm is increased; hence in low Signal to Noise (SNR) scenarios simulations time span is apparently high. RAJSS is, finally, compared to a strategy which assigns to the terminals the subcarriers which show the best quality (highest SNR). To do so, CSI is considered. In this case and in some scenarios, RAJSS algorithm has improved performance.