Ultrawideband Sampling

超宽带采样

• 批准号: 424608109
• 负责人: Professor Dr.-Ing. Christoph Scheytt
• 金额: --
• 依托单位: Institut für Hochfrequenztechnik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/424608109?language=en
• 关键词: Ultrawideband; Sampling

The metrology of wireless communication has to properly represent the complex interaction of the digital and analog signal domains. The high bandwidth at THz frequencies allows for extreme radio frequency (RF) bandwidth and hence also very large baseband bandwidth. In the baseband the broadband analog signals are digitized by broadband analog-to-digital-converters (ADC). In an ADC the signal is first sampled and then the stream of analog samples is converted to a stream of digital data words. Typically it is the precision of the sampling which determines the precision of the ADC. The high bandwidths of the analog input signals require extreme fast samplers and insufficient sampler bandwidth will be a cause for signal degradation. Besides bandwidth, another major performance bottleneck of broadband samplers is aperture jitter rsp. clock jitter of the electronic clock. As an alternative, optical clocks based on pulse trains from mode-locked lasers (MLL) have demonstrated to achieve much smaller jitter than electronic clocks. This has led to the development of photonic samplers and ADCs using ultra-low-jitter optical clocks. So far most of the photonic sampling techniques use discrete optical devices and large, complex laboratory setups. Recently photonics integration technology such as indium phosphide technology and silicon photonics have made significant progress and allow to integrate photonic sampling circuits (except the MLL) in a similar way as electronic samplers. This will allow for mechanically stable, miniaturized, and cost-efficient photonic sampling devices. In the projct of METERACOM the groups from PIs Scheytt and Schneider will investigate different variants of ultra-broadband electronic and photonic sampling techniques with bandwidth up to 40 GHz as required for THz wireless communication and their suitability for integration. The three goals of B3 are: 1) to investigate different photonic sampling techniques for the sampling of THz waveforms both theoretically and experimentally, 2) to implement a novel ultra-broadband photonic sampling technique (frequency-time-coherent sampling) for the first time in a silicon photonic chip and 3) to model and compare electronic and photonic sampling techniques and find the ultra-broadband sampling technique which is best suited for integration. Investigations will be carried out by means of mathematical analysis, numerical modeling and simulation, as well as measurements of different sampling devices.

无线通信计量必须正确表示数字和模拟信号域的复杂交互。太赫兹频率的高带宽允许极端的射频 (RF) 带宽，因此也允许非常大的基带带宽。在基带中，宽带模拟信号由宽带模数转换器 (ADC) 进行数字化。在 ADC 中，首先对信号进行采样，然后将模拟样本流转换为数字数据字流。通常，采样精度决定了 ADC 的精度。模拟输入信号的高带宽需要极快的采样器，采样器带宽不足将导致信号劣化。 除了带宽之外，宽带采样器的另一个主要性能瓶颈是孔径抖动rsp。电子钟的时钟抖动。作为替代方案，基于锁模激光器 (MLL) 脉冲串的光学时钟已被证明可以实现比电子时钟小得多的抖动。这导致了使用超低抖动光学时钟的光子采样器和 ADC 的开发。到目前为止，大多数光子采样技术都使用分立光学设备和大型复杂的实验室装置。最近，磷化铟技术和硅光子等光子集成技术取得了重大进展，并允许以与电子采样器类似的方式集成光子采样电路（MLL 除外）。这将实现机械稳定、小型化且经济高效的光子采样设备。在 METERACOM 项目中，PI Scheytt 和 Schneider 的团队将研究太赫兹无线通信所需带宽高达 40 GHz 的超宽带电子和光子采样技术的不同变体及其集成适用性。 B3的三个目标是：1）从理论上和实验上研究用于太赫兹波形采样的不同光子采样技术，2）首次在硅光子芯片中实现一种新颖的超宽带光子采样技术（频率-时间相干采样），3）对电子和光子采样技术进行建模和比较，并找到最适合的超宽带采样技术。 最适合集成。调查将通过数学分析、数值建模和模拟以及不同采样装置的测量来进行。