脉冲幅度调制
波形
振幅
信号(编程语言)
物理
脉搏(音乐)
正交调幅
电气工程
误码率
材料科学
光学
探测器
电信
解码方法
电压
计算机科学
工程类
量子力学
程序设计语言
作者
Soon Onn Lai,Y. Liu,Shuang Hang,J. Mu,Xiaobin Tang
标识
DOI:10.1109/ted.2023.3309276
摘要
In this work, a pulse amplitude modulation with four-level (PAM-4) signal loading scheme based on carbon nanotube (CNT) cold cathode X-ray source is designed for X-ray communication (XCOM). The relationship between the X-ray waveforms and amplitude characteristics under this scheme is studied, and the XCOM performance is obtained. Results show that the amplitude difference of each level of X-ray waveforms is obvious, and it is corresponding well with the input signal amplitude. The X-ray amplitude difference of each level is 0.7–0.8 V when the ratio of the four pulse voltage signal amplitudes is 1:0.42: −0.12: −1. About 70% of the signal waveforms of each level is relatively concentrated under different frequencies, and this proves the stability and feasibility of the PAM-4 loading scheme. According to the 26-letter American standard code for information interchange (ASCII) code signal transmission experiment, the bit error rate (BER) is increased from 0 to $4.7\times 10^{-{2}}$ when the pulse frequency increases from 1 to 1000 kHz. This work designs a PAM-4 signal loading scheme for XCOM with a CNT cold cathode X-ray source, which can promote the development of XCOM technology in the future.
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