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http://dx.doi.org/10.12673/jant.2014.18.6.541

Implementation of π/4-DQPSK Modem for Maritime Digital Communication in VHF Band  

Kwak, Jaemin (Department of Information and Communication Engineering, Mokpo National Maritime University)
Publication Information
Journal of Advanced Navigation Technology / v.18, no.6, 2014 , pp. 541-545 More about this Journal
Abstract
Rec. ITU-R M.1842-1 is international recommendation for VHF band communication guideline in maritime mobile service RR Appendix 18 channels. In this paper, we simulate 28.8 kbps VHF ${\pi}$/4-DQPSK digital baseband modem compatible with the recommendation, then it is designed and implemented with FPGA. Cazac sequence is used as a preamble since packet format is not defined untill now in the recommendation. Baseband modem is designed by VHDL language and implemented on NEXYS4 development platform having Atrix7 FPGA chip from Xilinx. For wireless communication test of total prototype system, ADC/DAC board is implemented and EV9730 RF module is utilized. From the experimental results, implemented FPGA modem shows spectral bandwidth of 25 kHz and successful data exchanges between tx and rx communication platform.
Keywords
Very high frequency; ${\pi}$/4-differential quadrature phase shift keying; Very high speed integrated circuit hardware description language; International telecommunication union radiocommunication sector M.1842-1;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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