An Efficient Filter-Bank Multi-Carrier System for High-Speed Wireline Applications

Abstract

This paper proposes an efficient multi-carrier system that combines filter-bank multi-carrier signalling, decision-directed channel estimation, and frequency-domain timing recovery to eliminate the overhead associated with cyclic prefix, large side-lobes, and pilot carriers. Furthermore, a technique is proposed to halve the required number of FFTs (IFFTs), reducing their complexity by 29% for a 32-point resolution; a method is proposed to correct tilt and stretch distortion; and a gain controller with adaptive loop coefficients is adopted to achieve the same stability but 65% higher tracking bandwidth regardless of the FFT size. The concept is validated at the system level, where impairments are applied, enabling an in-depth comparison to conventional discrete multi-tone signalling. Assuming a 32-point FFT, a 35dB channel, and an overlap factor of 3, results show 101% improvement in capacity, 100% improvement in power efficiency, and 101% improvement in area efficiency, and all while maintaining comparable latency. This work enables very low-resolution multi-carrier schemes, which were previously impractical due to the significant overhead.

Continuous unconstrained PSO‐PTS strategy to maximize HPA energy efficiency for FBMC‐OQAM systems

“…The FBMC‐OQAM employs the multi‐carrier filter bank (Filtered Multi‐tone, FML) [29] and multi‐carrier interleaving (Staggered Multi‐tone, SMT) approaches to modulate the signal [30], which contains M subcarriers, N symbols, and T symbol period. The signal $$s_{m}^{n}$$ is divided into real parts $$a_{m}^{n}$$ and $$T/2$$ staggered imaginary parts $$b_{m}^{n}$$ as $$x_{m}^{n}=a_{m}^{n}+jb_{m}^{n}$$ to achieve spectral efficiency, $$a_{m}^{n}$$ and $$b_{m}^{n}$$ are multiplied by the phase shift factors.…”