Open AccessNovel Peak‐to‐Average Power Ratio Reduction Methods for OFDM/OQAM Systems
Author(s) -
Sandeep Vangala,
Anuradha Sundru
Publication year - 2016
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.16.0116.0272
Subject(s) - orthogonal frequency division multiplexing , computer science , algorithm , clipping (morphology) , electronic engineering , reservation , modulation (music) , telecommunications , channel (broadcasting) , engineering , computer network , linguistics , philosophy , aesthetics
The tone reservation method is one of the most effective pre‐distortion methods for peak‐to‐average power ratio reduction in orthogonal frequency division multiplexing (OFDM) systems. Its direct application to OFDM systems with offset quadrature amplitude modulation (OQAM) is, however, not effective. In this paper, two novel TR‐based methods are proposed, specifically designed for OFDM/OQAM systems by taking into consideration the overlapping nature of OQAM signals. These two methods have different approaches to the generation of the peak‐cancelling signal. The first one ( overlapped scaling tone reservation ) generates the peak‐cancelling signal using a least squares approximation algorithm with possible adjacent symbol overlap; the second one ( multi‐kernel tone reservation ) generates the peak‐cancelling signal by using multiple impulse‐like time domain kernels. It is shown by simulation that, when used in OFDM/OQAM systems, the proposed methods can provide better performance than the direct application of the existing controlled clipping tone reservation method, and even outperform the multi‐block tone reservation method.