DBPM signal processing with field programmable gate arrays

DBPM signal processing with field programmable gate arrays 1 2 first-author 1 corresp Corresponding author. E-mail address: lengyongbin@sinap.ac.cn Corresponding author. E-mail address: lengyongbin@sinap.ac.cn lengyongbin@sinap.ac.cn 1 2 1 1 2 1 2 1 2 1 2 Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Shanghai 201800, China Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Shanghai 201800, China Graduate University of Chinese Academy of Sciences, Beijing 100049, China Graduate University of Chinese Academy of Sciences, Beijing 100049, China DBPM system performance is determined by the design and implementation of beam position signal processing algorithm. In order to develop the system, a beam position signal processing algorithm is implemented on FPGA. The hardware is a PMC board ICS-1554A-002 (GE Corp.) with FPGA chip XC5VSX95T. This paper adopts quadrature frequency mixing to down convert high frequency signal to base. Different from conventional method, the mixing is implemented by CORDIC algorithm. The algorithm theory and implementation details are discussed in this paper. As the board contains no front end gain controller, this paper introduces a published patent-pending technique that has been adopted to realize the function in digital logic. The whole design is implemented with VHDL language. An on-line evaluation has been carried on SSRF (Shanghai Synchrotron Radiation Facility) storage ring. Results indicate that the system turn-by-turn data can measure the real beam movement accurately, and system resolution is 1.1 µm. DBPM FPGA Frequency mixing CORDIC References Lai L W , Leng Y B , Yan Y B , et al . Nucl Tech , 2010 , 33 : 734 - 739 (in Chinese) Nucl Tech Uwe Meyer-Baese . Digital Signal Processing with Field Programmable Gate Arrays , Second Edition. Beijing : Tsinghua University Press , Chapter 5 , 2007 , 158 - 173 (in Chinese) . Digital Signal Processing with Field Programmable Gate Arrays Xilinx Inc , FIR_Compiler v4.0 data sheet , June 27, 2008 . http://www.uccs.edu/~gtumbush/4211/fir_compiler_ds534.pdf . FIR_Compiler v4.0 data sheet Yang X N , Lou C Y , Xu J L , et al . Software radio theory and application . Beijing : Publishing House of Electronics Industry , 2001 . Chapter 2 , 48 - 53 (in Chinese) . Software radio theory and application Volder J E . The CORDIC Trigonometric Computing Technique . IRE Trans Electron Comput , 1959 , 8 : 330 - 334 . The CORDIC Trigonometric Computing Technique Walther J S . A Unified algorithm for elementary functions , Spring Joint Computer Conference pp. California , USA 1971 , 379 - 385 . A Unified algorithm for elementary functions Andraka R . A survey of CORDIC algorithms for FPGA based computers . ACG, Inc. ACM 0-89791-978-5/98/01 , 1998 . A survey of CORDIC algorithms for FPGA based computers Xilinx Inc , DDS Compiler v4.0 data sheet , November 30, 2006 . http://www.xilinx.com/support/documentation/ip_documentation/dds_ds558.pdf . DDS Compiler v4.0 data sheet Liu K . The design and implementation of digital down convector circuit corresponding verification platform . Chengdu : University of Electric Science and Technology of China , 2006 , 28 (in Chinese) . The design and implementation of digital down convector circuit corresponding verification platform Leng Y B , Zhou W M , Yuan R X , et al . Nucl Tech , 2010 , 33 : 401 - 404 (in Chinese) . Nucl Tech Leng Y B , Ye K R , Zhou W M , et al . SSRF beam diagnostics system commissioning Proc Of DIPAC’09 , 2009 , 24 - 26 . SSRF beam diagnostics system commissioning 10.13538/j.1001-8042/nst.22.129-133 Supported by Shanghai Synchrotron Radiation Facility project 2011-01-18 2011-06-20 2021-01-19 2011 Nuclear Science and Techniques 03 22