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http://dx.doi.org/10.7840/kics.2015.40.1.23

Design and Performance Evaluation of SSD (Simultaneous Single Band Duplex) System with HPA Nonlinearity  

Keum, Hong-Sik (ElectroMagnetic wave Technology Institute, RAPA)
An, Changyoung (Department of electronic engineering, Chungbuk National University)
Ryu, Heung-Gyoon (Department of electronic engineering, Chungbuk National University)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.40, no.1, 2015 , pp. 23-31 More about this Journal
Abstract
In this paper, we design a SSD(simultaneous single band duplex) system using RF cancellation and digital cancellation. And then, we analyze performance of the SSD system using pre-distorter with HPA non-linearity. Also, we analyze digital cancellation performance of the SSD system using pre-distorter with HPA non-linearity. Additionally, digital cancellation cancels residual self-interference. In linear conditions, digital cancellation can cancel self-interference of 40dB. Therefore, the SSD system has good BER performance because most of self-interference is canceled. But, in HPA non-linearity conditions, digital cancellation cancels residual self-interference of 25dB. In this conditions, self-interference is greater than desired signal. Therefore, bit informations of distant station can not be received. But, we confirm that if the proposed system uses pre-distorter then bit information of distant station can be received by HPA non-linearity compensation. Also, we confirm that even though the proposed system uses pre-distorter, if HPA non-linearity increases then digital cancellation performance is degraded by imperfect compensation of HPA non-linerity.
Keywords
SSD; full-duplex; HPA nonlinearity; predistortion;
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Times Cited By KSCI : 2  (Citation Analysis)
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