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Equalization and blind CFO estimation for performance enhancement of OFDM communication systems using discrete cosine transform
Author(s) -
Ramadan Khaled,
Dessouky Moawad I.,
Abd ElSamie Fathi E.,
Fiky Ahmed S.
Publication year - 2020
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.3984
Subject(s) - carrier frequency offset , orthogonal frequency division multiplexing , computer science , equalization (audio) , discrete cosine transform , joint (building) , adaptive equalizer , compensation (psychology) , wireless , algorithm , control theory (sociology) , electronic engineering , frequency offset , telecommunications , channel (broadcasting) , artificial intelligence , decoding methods , engineering , architectural engineering , psychology , control (management) , psychoanalysis , image (mathematics)
Summary In wireless communication systems, equalization is one of the most important schemes to improve the system performance. This paper consists of two main parts. The first part presents a blind carrier frequency offset (CFO) estimation scheme based on discrete cosine transform (DCT). The second part presents a joint low‐complexity equalization, and CFO compensation in orthogonal frequency division multiplexing (OFDM) systems. Moreover, in the second part, we present a joint low‐complexity regularized zero‐forcing (JLRZF) equalizer based on the proposed CFO estimation scheme. Simulation results show that the proposed configuration has the ability to perform blind CFO estimation and enhance the system performance in the presence of estimation errors.