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International Journal of Computer Engineering in Research Trends. Scholarly, Peer-Reviewed, Platinum Open Access and Multidisciplinary

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Mitigation of ICI Through Optimized SSR ICI Self Cancellation Scheme in OFDM

Shyam Sunder Kongonda , Dr.Srinivasulu Tadishetty, , ,
Kakatiya University College of Engineering and Technology, Warangal, India

Orthogonal frequency division multiplexing (OFDM) is extensively used in wireless communication systems because it offers high data rates and provides a better solution to inter symbol interference (ISI) caused by a multipath channel. A well known problem of OFDM system is sensitive to carrier frequency offset (δ) between the transmitted and received signals. The Frequency offset in wireless communication systems ruins the Orthogonality between subcarriers resulting in Inter Carrier Interference (ICI).Which is a severe problem in OFDM system and eventually decrease the performance of the system. There are numerous techniques are in existence to mitigate the effect of ICI caused by CFO (carrier frequency offset). This paper investigates an innovative ICI cancellation method termed as optimized SSR (symmetric symbol repeat) ICI self cancellation scheme. The proposed method utilizes an optimum data allocation (1,-λ) and combining (1,-µ) scheme to improve CIR performance for an estimated normalized frequency offset δ. However, this requires continuous CFO estimation and feedback circuitry. To avoid the requirement of CFO, sub optimal values (λso, µso) are considered for combating the effect of ICI. This paper mainly focus on comparison of proposed method with the previous reduction methods and standard OFDM system in terms of CIR (carrier to interference) & BER (bit error rate) performance.

Shyam Sunder Kongonda and Dr.Srinivasulu Tadishetty," Mitigation of ICI Through Optimized SSR ICI Self Cancellation Scheme in OFDM”, International Journal of Computer Engineering In Research Trends, Volume 3, Issue 9, September-2016, pp. 482-486


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