A Multi-code Multi-Tone DHA FH OFDMA System with Nonparametric Reception
A DHA FH OFDMA that uses order statistics- based techniques can be a very promising technique for mMTC systems. However for any case of practical interest the transmission rate of a classical DHA FH OFDMA system is relatively low due to complexity restrictions. To solve this problem a solution using concatenated coding in multiple disjoint subbands has been proposed recently. In this paper another solution based on muti-tone multi-code transmission in a single subband is advocated. It is demonstrated that the proposed solution outperforms the single-tone DHA FH OFDMA using the same detector in terms of both complexity and performance and has lower complexity and latency and almost the same performance than the previously proposed multi-tone coded modulation scheme.