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(zhì)的通信方式。利用電力線等媒體傳輸數(shù)據(jù)信息，可以降低運(yùn)營(yíng)成本、減少構(gòu)建新的通信網(wǎng)絡(luò)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(qiáng)等優(yōu)點(diǎn)，可以應(yīng)用于用電信息采集、智慧能源等多場(chǎng)景，作為解決“最后一公里”問題的有效傳輸模式，是組成電網(wǎng)信息物理系統(tǒng)的基礎(chǔ)底層網(wǎng)絡(luò)構(gòu)件[2]。但與傳統(tǒng)通信介質(zhì)相比，電力線上各類電力負(fù)載的接入及其接入的變化就造成了復(fù)雜多變的電力線信道特性[3-4]，影響電力線信道通信質(zhì)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(zhì)量的重要因素[6]。
