摘要
摘要 本研究提出一種使用兩個混沌信號與單邊帶全載波（SSBFC）和開關鍵控（OOK）相結合的調變方法，這種方法主要可以應用在雜訊通道中傳送數位信號。使用的混沌信號是Van der Pol振盪器和Lorenz吸引子。它們都使用SSBFC進行調變，其中Van der Pol混沌信號使用上邊帶，而Lorenz混沌信號使用下邊帶。數位訊號使用OOK調變，並且依據數位訊號的狀態來傳送調變的混沌信號。在接收器側，則使用低通濾波器去除雜訊，並使用一個解碼器來恢復原始訊號。本研究使用MATLAB Simulink進行模擬，根據模擬的結果，這個調變方法可以提高傳輸的安全性，並減少雜訊所引起的失真影響。
並列摘要
Abstract This study proposes a modulation method that uses two chaotic signals combined with single sideband full-carrier (SSBFC) and on-off keying (OOK). This method can be applied to transmit digital signals in the noisy channel. The chaotic signals used are the Van der Pol oscillator and the Lorenz attractor. They are all modulated using SSBFC, where the Van der Pol chaotic signal uses the upper sideband and the Lorenz chaotic signal uses the lower sideband. The digital signal is modulated by OOK, and the modulated chaotic signal is transmitted according to the state of the digital signal. On the receiver side, a low pass filter is used to remove the noise and a decoder is used to recover the original signal. This study uses MATLAB Simulink for simulation. According to the simulation results, this modulation method can improve the transmission security and reduce the distortion caused by noise.