None Degradation Impulse Filter Bank with Index Modulation Transmission

The high-order filter bank, which is used in 5G backhaul link, reduces the Bit Error Ratio (BER) performance. In this paper, the scheme of N-dimensional pseudo-orthogonal filter band-pass filter bank with orbital angular momentum index modulation by using the phase gradient method to detect the orbital angular momentum modes, and N-dimensional corresponding pseudo-orthogonal matched filter bank to demodulate signals is proposed. The orbital angular momentum index modulation is employed in the impulse filter bank to guarantee the BER performance. Specifically, the Euclidean distance is increased with the new dimension of orbital angular momentum, and can be used to compensate the Euclidean distance degradation invoked in high order impulse filter bank. Then, the higher spectrum efficiency can be obtained by high order filter bank in backhaul transmission without BER performance degradation. It can be estimated that, the proposed scheme is a promising solution to achieve the backhaul transmission capacity over 100 Gpbs in B5G and 6G.