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Computer and Its Environment
Published in Pranabananda Chakraborty, Computer Organisation and Architecture, 2020
Nevertheless, the architecture of the computer entails many other different issues, including the processor design that itself constitutes a central and very important element of computer architecture. That is why, various functional elements of a processor must be designed, interconnected without much affecting the existing organisation, and interoperated in such a way that desired processor performance can be achieved.
Optimised Floating Point FFT Core for Improved OMP CS System
Published in International Journal of Electronics, 2022
Alahari Radhika, K. Satya Prasad, K. Kishan Rao
Yang et al. (2016) presented an in-board SAR (synthetic aperture radar) imaging system with a high precision, hardware-efficient FFT processor. A radix-2k mixed FFT algorithm was proposed to fulfil the standards of high resolution imagery and granularity analysis of big data. The mixed Radix FFT algorithm reduced the number and the size of the memory for the twiddle factor. An appropriate fixed point simulation was performed for the fixed point FFT processor design in order to decrease hardware resources and improved FFT precision. A fixed-point processor with a 32,768-point proof was built on the FPGA platform XC6VCX240T. Intrinsic word-length signal-to-quantisation noise ratios of 47.3 dB were proposed for the FFT pipeline processor. The results showed that their architecture saves 11% memory and 57% arithmetic components, compared with the Xilinx FFT v7.1 IP core.
Evaluation of beamline subsystem performance during technical commissioning of an superconducting proton therapy facility
Published in Journal of Nuclear Science and Technology, 2022
Jinxing Zheng, Xianhu Zeng, Cheng Wang, Dixi Huang, Yiyue Cheng, Lei Zhu
The scanning system accurately controls the position of the beam and includes a scanning power supply, scanning magnet and scanning control system [10]. The scanning magnet includes fast and slow scanning magnets that deflect the beam in the x- and y-directions [11]. The scanning control system includes a real-time controller, power supply control module and magnetic field acquisition module (hall probe). The helium gas system includes a helium chamber, HC80 controller, environmental sensor and helium tank. The beam monitoring system consists of ionization chambers and I128 electrometers. There are three ionization chambers, namely, IC1, IC2 and PX-3 [12], which monitor the beam profile, position, dose and current intensity in real time. The structure of the nozzle system is shown in Figure 7. Coordinated operation of each functional module of the nozzle system allows successful capture of the beam signal and realizes high-precision position scanning. Through a variety of redundant design schemes, the whole system has high stability and reliability. Using a high-speed processor design, the scanning time is greatly reduced (fast scanning speeds are >35 m/s and slow scanning is >10 m/s). The safety interlocking system includes 10 interlocking inputs. When the system finds any hidden danger (e.g. position deviation of ± 1.0 mm or a helium solubility of <97.5%), the safety interlocking system is triggered. The accelerator interface system is a data interaction interface between the accelerator control system and the nozzle control system. Various key control signals, feedback signals and monitoring signals can interact through this system. The physical therapist console is a device allowing a physical therapist to operate and monitor the treatment process during proton therapy. It includes a hardware module and monitoring interface.
A unified reconfigurable CORDIC processor for floating-point arithmetic
Published in International Journal of Electronics, 2020
Linlin Fang, Bingyi Li, Yizhuang Xie, He Chen, Long Pang
The proposed reconfigurable floating-point CORDIC processor design is shown in Figure 3. By adding selectors, common circuits in different modes can be maximised for reuse. We assign 2-bit signal T1&T0 to 00,01 and 10 to represent circular, linear and hyperbolic coordinate system, respectively, and 1-bit signal P equals to 0 or 1 to represent rotation or vector mode, respectively.