Abstract
TErrestrial Trunked Radio (TETRA) is a Professional Mobile Radio (PMR) standard developed by European Telecommunications Standards Institute (ETSI) for critical communications. Filters form an integral part of the physical layer of any communication system. In this paper, the design and implementation of Pulse shaping filter and Digital Up Conversion(DUC) filters in the transmitter section of TETRA radio is proposed. Xilinx System generator blocks have been chosen for the design which can be easily ported from one FPGA platform to another and reduces time to development. The filters have been designed using MATLAB FDATool and Xilinx FIR compiler block. The design has been simulated in MATLAB/Simulink environment and ported on to an Artix-7 FPGA based custom hardware platform. The constellation and spectrum at the output of Digital-to-Analog Converter(DAC) is verified to meet the TETRA standard. Also the transmitter performance measurement parameters like Adjacent Channel Power Ratio (ACPR) and Error Vector Magnitude (EVM) are measured and verified.
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