标题： 针对RFSoC射电天文接收器的高速数据转换器性能表征 显示英文标题

标题： Characterising the Performance of High-Speed Data Converters for RFSoC-based Radio Astronomy Receivers

摘要： 射频系统芯片（RFSoC）设备提供了在单块板上实现完整射电天文接收器的潜力，但集成的模数转换器的性能至关重要。 我们评估了Xilinx ZU28DR RFSoC中的数据转换器的性能，这些转换器是12位、8路交错的转换器，最大采样速率为4.096千兆样本每秒（GSPS）。 我们在2.048 GHz的带宽范围内测量了无杂散动态范围（SFDR）、信噪失真比（SINAD）、有效位数（ENOB）、互调失真（IMD）以及相邻通道之间的串扰。 我们既使用浮点运算捕获数据以进行离线分析，又在RFSoC上实现了实时整数运算光谱仪。 ADC的性能足以满足射电天文应用的需求，并在大多数场景中接近供应商规格。 我们进行了长达100秒的频谱积分和数十小时的稳定性测试，并发现在此时间尺度上的性能受热噪声限制。 显示英文摘要

摘要： RF system-on-chip (RFSoC) devices provide the potential for implementing a complete radio astronomy receiver on a single board, but performance of the integrated analogue-to-digital converters is critical. We have evaluated the performance of the data converters in the Xilinx ZU28DR RFSoC, which are 12-bit, 8-fold interleaved converters with a maximum sample speed of 4.096 Giga-sample per second (GSPS). We measured the spurious-free dynamic range (SFDR), signal-to-noise and distortion (SINAD), effective number of bits (ENOB), intermodulation distortion (IMD) and cross-talk between adjacent channels over the bandwidth of 2.048 GHz. We both captured data for off-line analysis with floating-point arithmetic, and implemented a real-time integer arithmetic spectrometer on the RFSoC. The performance of the ADCs is sufficient for radio astronomy applications and close to the vendor specifications in most of the scenarios. We have carried out spectral integrations of up to 100 s and stability tests over tens of hours and find thermal noise-limited performance over these timescales.