Abstract： The noise environment of HPLC channel is complex, but the existing equipment is difficult to collect and analyze the channel noise. Therefore, this paper proposes a HPLC channel analysis module, which can realize the functions of high-precision sample collection, channel attenuation characteristic test, etc., and can play back the noise in the laboratory test environment to realize the real simulation of the field environment. Firstly, the hardware architecture of the analysis module is introduced, the state machine design of FPGA logic circuit and embedded software design are described . Finally, the prototype is tested. The results show that the channel analysis module can meet all the functions of the design requirements, and solve the problems of HPLC communication chip anti noise research and field maintenance test.
Key words : HPLC；channel noise；high speed signal acquisition；FPGA
0 引言
電力線載波通信(Power Line Communication，PLC)是一種使用電力線作為物理通信介質的通信方式。利用電力線等媒體傳輸數據信息，可以降低運營成本、減少構建新的通信網絡的支出[1]。而相比窄帶載波，高速載波具有速率高、抗干擾能力強等優點，可以應用于用電信息采集、智慧能源等多場景，作為解決“最后一公里”問題的有效傳輸模式，是組成電網信息物理系統的基礎底層網絡構件[2]。但與傳統通信介質相比，電力線上各類電力負載的接入及其接入的變化就造成了復雜多變的電力線信道特性[3-4]，影響電力線信道通信質量的特性有線路阻抗、噪聲等[5]，其中噪聲是影響低壓電力線載波通信質量的重要因素[6]。
