Joint Design of Spectrally-Constrained OFDM Sequences and Mismatch Filter With PAPR Constraint

TL;DR

This paper proposes a joint design method for OFDM sequences and mismatch filters to achieve low correlation sidelobes under spectral and PAPR constraints, using an efficient optimization algorithm.

Contribution

It introduces a novel joint design framework with an alternating optimization algorithm for spectrally-constrained OFDM sequences and mismatch filters.

Findings

Effective reduction of correlation sidelobes demonstrated

Algorithm outperforms existing methods in simulations

Design meets spectral and PAPR constraints

Abstract

The OFDM sequences with low correlation sidelobe level (SLCL) is desired in many 5G wireless systems. In this letter, the OFDM sequences and mismatch filter are jointly designed to achieve the SLCL under the constraints of spectra and peak to average power ratio (PAPR). Specifically, we formulate the optimization problem by maximizing the peak side lobe ratio (PSLR) of the cross-correlation between the OFDM sequences and mismatch filter, subject to several practice constraints. To solve the nonconvex problem, an efficient alternating optimization (AltOpt) algorithm is proposed. Numerical simulations are provided to demonstrate the effectiveness of the proposed algorithms.