论文标题
表征基于RFSOC的射电天文学接收器高速数据转换器的性能
Characterising the Performance of High-Speed Data Converters for RFSoC-based Radio Astronomy Receivers
论文作者
论文摘要
芯片上的RF系统（RFSOC）设备提供了在单个板上实现完整的射电天文学接收器的潜力，但是集成的模数转换器的性能至关重要。我们已经评估了Xilinx Zu28dr RFSOC中数据转换器的性能，该Xilinx Zu28dr RFSOC是12位，8倍交换转换器，最大样品速度为每秒4.096 Giga-sample（GSP）。我们测量了无潮流动态范围（SFDR），信噪比和失真（SINAD），有效数量的位（ENOB），间隔变形（IMD）和相邻通道之间的串扰，超过2.048 GHz的带宽。我们都使用浮点算术捕获了用于离线分析的数据，并在RFSOC上实现了实时整数算术光谱仪。在大多数情况下，ADC的性能足以用于射电天文学应用，并且接近供应商规格。我们已经在数十个小时内进行了多达100 s和稳定性测试的光谱整合，并在这些时间尺度上找到了热噪声有限的性能。
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.
