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Design and Implementation of Receiver Algorithms for VDL Mode-2 Systems  

Lee, Hui-Soo (Department of Electronics and Computer Engineering, Chungnam National University)
Kang, Dong-Hoon (Department of Electronics and Computer Engineering, Chungnam National University)
Park, Hyo-Bae (Department of Electronics and Computer Engineering, Chungnam National University)
Oh, Wang-Rock (Department of Electronics and Computer Engineering, Chungnam National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.46, no.10, 2009 , pp. 28-33 More about this Journal
Abstract
In this paper, we propose the receiver algorithms suitable for the VHF (Very High Frequency) digital link mode-2(VDL Mode-2) system. Unlike conventional digital communication systems using the root raised cosine filter as a transmit and receive filter, raised cosine filter is used as a transmit filter in the VDL Mode-2 system. Hence, it is crucial to design and implement the optimum lowpass receive filter by considering inter-symbol interference and noise performance. On the other hand, due to the short preamble pattern, it is crucial to develop an efficient packet detection algorithm for reliable communication link for the VDL Mode-2 system. Also, frequency offset due to the carrier frequency difference between transmitter and receiver and doppler frequency shift must be estimated and compensated for reliable communication. In this paper, the optimum receive filter, packet detection and frequency offset compensation algorithms are proposed and the performance of the VDL system employing the proposed algorithms are evaluated.
Keywords
VHF digital link mode-2; D8PSK; false alarm probability; missing probability;
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