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http://dx.doi.org/10.5515/KJKIEES.2012.23.11.1264

Analysis of Performance of Digital Retrodirective Antenna Technology in High-Speed Rail  

Bok, Junyeong (Department of Electronics and Engineering, Chungbuk National University)
Lee, Seung Hwan (Electronics and Telecommunications Research Institute)
Shin, Dong Jin (Electronics and Telecommunications Research Institute)
Ryu, Heung-Gyoon (Department of Electronics and Engineering, Chungbuk National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.23, no.11, 2012 , pp. 1264-1271 More about this Journal
Abstract
Fast tracking is important for high-speed data transmission in high-speed mobile environment such as high speed rail and vehicular. Digital retrodirective array antenna is possible to do automatically beam tracking because it can control the phase information of the output signal toward opposite direction to input signal without no a priori knowledge of the arrival direction. Also, Digital retrodirective array antennas has merit that it is easy to upgrade and modify compare with analogue retrodirective array antennas. In this paper, we analyze the BER performance of digital retrodirective array antenna under AWGN environment and multipath signal. Simulation results show correct phase estimation and conjugation of retrodirective array antenna by using phase detector block. Also, phase conjugation technique has better BER performance about 1 dB at source than that of without phase conjugation when phase lag is $15^{\circ}$ in AWGN environment. This paper also discusses effect of the presence of multipath signal. Phase and amplitude error about direction of direct signal occurs when retrodirective array system is affected by interference and multipath signal in the presence of multipath signal.
Keywords
Retrodirective Antenna; Phase Conjugator; Phase Detector; Phase Lock Loop; Array Antenna;
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