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http://dx.doi.org/10.6109/jkiice.2019.23.8.981

A New SC-FDE Transmission Structure for Coping with Narrow Band Jammers and Reducing Pilot Overhead  

Joo, So-Young (Department of Information and Communication Engineering, Hanbat National University)
Choi, Jeung-Won (Agency for Defense Development)
Kim, Dong-Hyun (Agency for Defense Development)
Jeong, Eui-Rim (Department of Information and Communication Engineering, Hanbat National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.23, no.8, 2019 , pp. 981-987 More about this Journal
Abstract
In this paper, we propose a new SC-FDE (single carrier frequency domain equalization) structure to cope with narrow band interference signals or jammers and reduce pilot overhead. The conventional SC-FDE structure has a problem that the receiver performance degrades severely due to difficulty in time-domain channel estimation when narrow band jammers exist. In addition, the spectral efficiency is lowered by transmitting pilot at every SC-FDE block to estimate channel response. In order to overcome those problems, the proposed structure is devised to estimate frequency domain channel directly without time domain channel estimation. To reduce the pilot overhead, several data blocks are transmitted between two pilots. The channel estimate of each data block is found through linear interpolation of two channel estimates at two pilots. By performing frequency domain channel equalization using this channel estimate, the distortion by the channel is well compensated when narrow band jammers exist. The performance of the proposed structure is confirmed by computer simulation.
Keywords
pilot overhead; frequency domain; linear interpolation; narrow band jammer; channel estimation;
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