Low Complexity Pipelined Architecture for FBMC/OQAM Transmitter
Filter bank multi carrier with offset quadrature amplitude modulation (FBMC/OQAM) is considered by recent research projects as a key enabler for the future 5G air interface. It exhibits better spectrum shape and improves mobility support compared to orthogonal frequency division multiplexing (OFDM) Therefore, the availability of efficient hardware implementations becomes of high interest. In this context, a novel pipelined hardware architecture of the transmitter capable of supporting several filter lengths and targeting low complexity is proposed and compared to typical FBMC/OQAM and OFDM implementations. For a short prototype filter, the proposed architecture provides a complexity reduction of 40 to 50% in terms of computational and memory resources with respect to a typical FBMC/OQAM transmitter. In addition, it greatly reduces the complexity gap to OFDM, making this modulation scheme particularly attractive from performance and implementation perspectives.
IEEE Transactions on Circuits and Systems II: Express Briefs