L-DACS1系统数字变频器的FPGA设计与实现

摘要

L⁃band digital aeronautical communication system(L⁃DACS1)is a kind of multi⁃carrier transmission one based on orthogonal frequency division multiplexing(OFDM). The system has the advantages of high utilization rate of frequency spec⁃trum and anti⁃multipath interferences. It is applicable to civil aviation A/G communication channel which is more complex for sig⁃nal transmission,and is a candidate of digital aviation communication systems in the future. The digital converter design scheme for L⁃DACS1 system is investigated in this paper. The scheme based on field programmable gate array(FPGA)was realized in Apex⁃CPCI⁃5610 communication development board. The test results show that the scheme can accurately implement digital up/down conversion,and can meet the design requirements of the L⁃DACS1 system.%L波段数字航空通信系统（L⁃DACS1）是一种基于正交频分复用（OFDM）技术的多载波传输方案。该系统具有频谱利用率高、抗多径干扰能力强等优点，适用于信号传输信道更复杂的民用航空地⁃空通信，并作为未来数字航空通信系统的候选系统之一。研究了L⁃DACS1系统数字变频器的设计方案，并基于现场可编程门阵列（FPGA）在Apex⁃CPCI⁃5610通信开发板上实现了这种方案。测试结果表明，该方案能够正确地实现数字上/下变频，能够满足L⁃DACS1系统设计要求。