Symbol Loss Probability of OFDMA Technique in Mobile Multi-Hop Relaying Systems

In this paper, we quantify the expected symbol loss probability in mobile multi-hop relaying systems employing Orthogonal Frequency Division Multiple Access (OFDMA) Techniques. We obtain the expected number of collisions and calculate the probability of symbol loss when a conflict occurs between subcarriers of two or more non-transparent relay stations, as well as we calculate the average symbol loss probability in the system. Also, the proportion of symbol with degraded SNR is measured and the collision rate is calculated. Our analysis shows that the resulting collision due to the simultaneous use of a subcarrier in different non-transparent relay stations can be very significant in a multi-hop relaying communication system, and severely degrades the SNR, and affects the QoS support in the system.