Out-of-Band Radiation Comparison of GFDM, WCP-COQAM and OFDM at Equal Spectral Efficiency

TL;DR

This paper compares the out-of-band emissions of GFDM, WCP-COQAM, and OFDM at equal spectral efficiency, analyzing their spectral characteristics and robustness to carrier frequency offsets for 5G applications.

Contribution

It provides a fair comparison of OOB emissions and carrier offset immunity among GFDM, WCP-COQAM, and OFDM, including analytical and simulation results.

Findings

GFDM and WCP-COQAM exhibit lower OOB emissions than OFDM.

All modulation schemes show similar spectral efficiencies under comparison.

Carrier frequency offset impacts are analyzed for each modulation type.

Abstract

GFDM and WCP-COQAM are amongst the candidate physical layer modulation formats to be used in 5G, whose claimed lower out-of-band (OOB) emissions are important with respect to cognitive radio based dynamic spectrum access solutions. In this study, we compare OFDM, GFDM and WCP-COQAM in terms of OOB emissions in a fair manner such that their spectral efficiencies are the same and OOB emission reduction techniques are applied to all of the modulation types. Analytical PSD expressions are also correlated with the simulation based OOB emission results. Maintaining the same spectral efficiency, carrier frequency offset immunities will also be compared.