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

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&#x0025; 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&#x0025; 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 <inline-formula> <tex-math notation="LaTeX">$35dB$ </tex-math></inline-formula> channel, and an overlap factor of 3, results show 101&#x0025; improvement in capacity, 100&#x0025; improvement in power efficiency, and 101&#x0025; 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.

Abstract licence: CC BY-NC-ND

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