Imperfect Reconstructed Filter Bank Multiple Access System Using Wide-Banded Subbands

Imperfect reconstructed filter bank multiple access (FBMA) for uplink transmission has been proposed recently which gets rid of real orthogonality in current filter bank multicarrier schemes. While it eases the filter design task and achieves better bit error rate (BER) performance than orthogonal frequency division multiple access (OFDMA), it still suffers from high peak-to-average power ratio (PAPR) and high computational complexity. In this paper we propose an improved version of existing imperfect reconstructed FBMA system. The basic idea is to replace the group of narrow-banded subbands of one user by a wide-banded subband. We will show that this simple modification not only reduces the transceiver complexity, but also substantially improves the PAPR and BER performance without any fancy preprocessing. Another contribution of this work is to propose an enhanced symbol detection algorithm by exploiting the released design freedom from PR constraint through polyphase component selection. Simulations show that by using the proposed detection algorithm, the BER performance of our proposed CP-FBMA approaches to that of single carrier frequency division multiple access (SC-FDMA) and could be even better at high signal-to-noise ratio region. Those results suggest the proposed FBMA using wide-banded subands is a good candidate new waveform for future generation communication systems.