Novel Code Filter-Bank Multicarrier Scheme with Low Complexity for OQAM Symbol Transmission and Reception
2018 IEEE 18th International Conference on Communication Technology (ICCT)(2018)
摘要
Filter bank multicarrier with offset quadrature amplitude modulation (FBMC-OQAM) system has low out-of-band emission but needs complex receiver for broadband channel. To address this problem, we propose a new cyclic prefix (CP)-based code FBMC-OQAM system (CC-FBMC-OQAM) with low complexity in this paper. CC-FBMC-OQAM system can be realized within the framework of the standard OFDM system, and perfect recovery (PR) condition is derived in the ideal channel. In order to reduce compute complexity, a low complexity transform of the Fast Walsh-Hadamard and Fourier transform (FWFT) is adopted and it uses a fast orthonormal unitary transform to calculate both the discrete Fourier transform (DFT) and the Walsh-Hadamard transform (WHT). Theoretical analysis and simulation results show that, compared to the C-FBMC-OQAM system and orthogonal frequency division multiplexing (OFDM) system, the computational complexity of proposed CC-FBMC-OQAM system is reduced substantially with almost same bit error rate (BER) performance in doubly-flat channel. Moreover, the BER performance of proposed CC-FBMC-OQAM system slightly outperform conventional C-FBMC-OQAM system in doubly-selective channel.
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关键词
Filter bank multicarrier,code FBMC-OQAM,cyclic prefix,low complexity,Walsh-Hadamard transform
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