基于Goertzel算法的选呼译码FPGA模块设计

选呼译码器是民航飞机的关键航电设备之一。针对传统选呼译码设备体积大、功耗高、可靠性相对低等不足,提出了一种基于FPGA芯片的选呼译码解决方案。Goertzel算法作为一类快速DFT算法,可高效解算DTMF信号中功率较大的频率点,己成为选呼译码的主流算法。将Goertzel算法嵌入FPGA芯片,可实现选呼译码器的高度集成化并降低功耗。结果表明,提出的基于FPGA的解决方案对新一代小型化选呼译码设备研发具有较好的参考价值。

Design of Selcal Decoding FPGA Module based on Goertzel Algorithm

The selective call decoder is one of the key avionics equipment of civil aviation aircraft.Aiming at the shortcomings of traditional selective call decoding equipment such as large volume,high power consumption and relatively low reliability,a selective call decoding solution based on FPGA chip is proposed.The Goertzel algorithm,as a type of fast DFT algorithm,can efficiently resolve the higher power frequency points in the DTMF signal,and has become the mainstream algorithm for selective call decoding.By embedding the Goertzel algorithm in the FPGA chip,the high integration of selective call decoder and the reduction of power consumption can be achieved.The experiment results indicate that the proposed FPGA-based solution has a good reference value for the development of new-generation miniaturized selective call decoding equipment.