Treffer: 基于并行计算的 PCAL 信号相位实时提取系统设计.

For the demand of high efficiency real phase extraction of phase calibration (PCAL) signals in antenna array equipment links, a real phase extraction method of PCAL signals using optimized fast Fourier transform (FFT) resolution is firstly proposed. In order to further improve the computational efficiency, the proposed method is combined with the deep computing unit (DCU) parallel computing technology to propose a parallel extraction method for the real phase of PCAL signal, and a real-time PCAL signal phase extraction system based on parallel computing is designed and realized. The experimental verification of the above improved method and real-time system is carried out, and a large number of experimental results show that the optimized FFT resolution method can achieve about three times of the acceleration ratio compared with the traditional FFT method. After the introduction of parallel computing, the acceleration ratio is further improved by nearly one order of magnitude, and the real-time extraction system of the phase of PCAL signals based on parallel computing can realize the real-time extraction of the phase of PCAL signals with the effective bandwidths of 2.2 GHz and below, the signal interval of 1 MHz, and the quantization number of 8 bit. In addition, the designed real-time system is also applicable to the link calibration of other frequency variation equipment. [ABSTRACT FROM AUTHOR]

针对天线组阵设备链路中相位校准 (phase calibration, PCAL) 信号的高效率真实相位提取这一需求, 首先提出一种优化快速傅里叶变换(fast Fourier transform, FFT) 分辨率的 PCAL 信号真实相位提取方法。为进一步提升计算效率, 将该方法与深度计算单元 (deep computing unit, DCU) 并行计算技术相结合, 提出 PCAL 信号真实相位并行提取方法, 并设计实现一种基于并行计算的 PCAL 信号相位实时提取系统。针对上述改进方法及实时系统进行实验验证, 大量实验结果表明, 优化 FFT 分辨率的方法相比传统 FFT 方法可实现约3倍的加速比；在引入并行计算后, 加速比进一步提升近一个数量级, 基于并行计算的 PCAL 信号相位实时提取系统可实现对有效带宽为2.2 GHz及以下、信号间隔为1 MHz, 量化位数为 8 bit 的 PCAL 信号的相位实时提取。此外, 设计的实时系统亦适用于其他变频设备的链路标校。 [ABSTRACT FROM AUTHOR]

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