Paper Info
Title
Coding to reduce the interference to carrier ratio of OFDM signals.
Abstract
In this paper, we propose a simple approach to reduce the sensitivity of OFDM system to the carrier frequency offset (CFO). The main idea is to choose a well-known channel code and to rotate each coordinate by a fixed phase shift such that the maximum inter-carrier interference (ICI) taken over all sub-carriers is minimized. This approach is based on a geometric interpretation of the peak interference to carrier ratio (PICR) of OFDM signals. Simulation results show that a reduction in PICR of 7 dB can be easily achieved. Furthermore, we addressed the fundamental limit of the proposed technique by providing both an exact and an approximate lower bound of PICR of phase-shifted binary codes. The bounds are applied to some codes: non-redundant binary code, BCH codes, and Reed-Muller codes. Simulation results demonstrated that phase-shift designs approach lower bounds and are resilient to CFO change.
Year
DOI
Venue
2017
10.1186/s13638-017-0809-3
EURASIP J. Wireless Comm. and Networking
Keywords
Field
DocType
OFDM, PIRC, Coding
Computer science,Upper and lower bounds,Binary code,Carrier frequency offset,Algorithm,Coding (social sciences),BCH code,Theoretical computer science,Real-time computing,Interference (wave propagation),Orthogonal frequency-division multiplexing,Phase (waves)
Journal
Volume
Issue
ISSN
2017
1
1687-1499
Citations 
PageRank 
References 
1
0.36
30
Authors
1
Name
Order
Citations
PageRank
Besma Smida17719.63