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Sensitivity of filter bank SCFDMA to carrier frequency offset and its compensation using firefly algorithm
Author(s) -
Deepak P. M.,
Ali C. K.
Publication year - 2018
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.3743
Subject(s) - carrier frequency offset , computer science , orthogonal frequency division multiple access , frequency offset , sensitivity (control systems) , offset (computer science) , compensation (psychology) , filter bank , filter (signal processing) , telecommunications link , electronic engineering , algorithm , interference (communication) , telecommunications , orthogonal frequency division multiplexing , engineering , psychology , channel (broadcasting) , psychoanalysis , computer vision , programming language
Summary This paper proposes an efficient wireless uplink strategy named filter bank single carrier frequency division multiple access. The proposed system combines the low peak‐to‐average power ratio of precoded orthogonal frequency division multiple access with the reduced out‐of‐band emission of filter bank multicarrier scheme. We present a complete mathematical analysis of the proposed model and derive the conditions to be fulfilled by the transmit filter for perfect data recovery. We further introduce a transmit filter design to enhance the peak‐to‐average power ratio and out‐of‐band emission characteristics of the proposed system. This paper also analyzes the sensitivity of the filter bank single carrier frequency division multiple access system to carrier frequency offset (CFO) and suggests a low complexity interference compensation scheme, under the assumption of perfect knowledge of CFO at the receiver. Later on, the assumption on CFO parameter is removed, and a blind interference compensation technique based on firefly algorithm is developed. Finally, a detailed simulation study is performed to substantiate the effectiveness of the proposed methods.