SBIR Phase I: Digital In-Phase and Quadrature Converter for Wide-Band Digital Beamforming

*摘要9660720卡普兰这个小型企业创新研究第一阶段项目将开发一种用于地面站与卫星通信的多芯片超导数字波束形成系统。DBF通过增强对来自多个特定方向的信号的接收，显著提高了通信系统的性能。性能的提高将降低卫星发射机所需的功率，从而减轻有效载荷的重量。正在研究的新的数字通信技术能够实现宽带和扩频通信信号的波束成形，这是目前的窄带系统无法执行的。对数字而不是非阻塞组件的依赖确保了更高的信号保真度和信噪比。在第一阶段项目中，将为拟议的波束形成系统开发数字同相和正交转换器(DIQC)。数字IQ电路将避免传统通信和雷达系统在增益、相位和时间延迟方面遇到的不平衡。DIQC电路的数字信号处理元件将使用快速单磁通量子(RSFQ)乘法器、累加器和其他算术逻辑电路。这些电路已经在HYPRES上以几千兆赫的频率成功演示。在第二阶段开发的多芯片DBF系统随后将在宽带数字波束形成通信和雷达系统中商业化，带宽高达2.5千兆赫，载频高达20千兆赫。正在开发的技术的商业应用包括宽带窄波束卫星通信链路、安全通信系统、用于监视、拦截和跟踪的多功能共形天线阵列。本程序开发的数字信号处理功能将有利于任何受处理速度限制的应用，如商用频谱分析仪和数字化仪器，以及数字电子战S系统。***

*** ABSTRACT 9660720 Kaplan This Small Business Innovation Research Phase I project will develop a multi-chip superconducting digital beamforming (DBF) system for ground station communications with satellites. DBF leads to a significant improvement in communication systems performance by enhancing the reception of signals from a number of specific directions. The increase in performance will lower the power required of satellite transmitters, thereby reducing payload weight. The novel digital communications technology under investigation enables beamforming for wide-band and spread-spectrum communications signals, which cannot be performed by present narrow-band systems. The reliance on digital rather than unclog components ensures higher signal fidelity and signal-to-noise. During the Phase I project, a Digital In-Phase and Quadrature converter (DIQC) will be developed for the proposed beamforming system. The digital IQ circuit will avoid the imbalances in gain, phase, and time delay experienced by conventional communications and RADAR systems. The digital signal processing elements for the DIQC circuits will utilize Rapid Single Flux Quantum (RSFQ) multipliers, accumulators, and other arithmetic logic circuits. These circuits have already been successfully demonstrated at HYPRES at multi-gigahertz frequencies. The multi-chip DBF system developed in Phase II will subsequently be commercialized in wide-band digital beamforming communications and RADAR systems, with bandwidths up to 2.5 GHz at carrier frequencies up to 20 GHz. Commercial applications of the technology under development include wide-band narrow-beam satellite communication links, secure communication systems, multi-functional conformal antennas arrays for surveillance, intercept, and tracking. The digital signal processing functions developed in this program will benefit any application limited by processing speed, such as commercial spectrum analyzer and digitizer instruments, as well as digital electronic warfare s ystems. ***