概括
我们开发了一种使用1位光子数字对模拟转换 (PDAC) 的新型任意波形发生器. 该系统实现了高保真度信号生成,并为先进应用提供了出色的信号与的比率.
科学领域:
- 光子学 是一个光子学.
- 信号处理 信号处理
- 电气工程 电气工程
背景情况:
- 任意波形发生器对于先进的通信和测试系统至关重要.
- 现有的方法在速度,分辨率和虚假信号抑制方面存在局限性.
研究的目的:
- 提出并展示一种新的任意波形发生器架构.
- 为了利用1位光子数字对模拟转换 (PDAC) 实现高性能信号合成.
主要方法:
- 该系统利用光子脉冲采样和时间交错.
- 高速光学脉冲由数字信号调节并通过光学合成.
- 光电转换产生了最终的模拟信号.
主要成果:
- 一个以50 GSa/s运行的1位PDAC被实验实现.
- 产生了一个X频段线性频率调制 (LFM) 波形,带宽为4GHz.
- 一个毫米波64QAM信号产生了4.27%的EVM和50dB的信号与杆比率.
结论:
- 拟议的1位PDAC架构能够实现高速,高保真性任意波形生成.
- 在1位结构中没有虚构组件,可以确保信号纯度.
- 这项技术为下一代信号生成需求提供了一个有前途的解决方案.
相关概念视频
01:10Reconstruction of Signal using Interpolation
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Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
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01:17Bandpass Sampling
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In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
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