Systems Engineering and Electronics ›› 2023, Vol. 45 ›› Issue (4): 965-972.doi: 10.12305/j.issn.1001-506X.2023.04.04

• Electronic Technology • Previous Articles    

GPU-based digital down-conversion cumulative error control method

Chao LI1,2, Yiwen JIAO1,*, Shiyuan FU2, Zefu GAO1, Feilong MAO1   

  1. 1. Department of Electronic and Optical Engineering, Space Engineering University, Beijing 101416, China
    2. State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, Luoyang 471003, China
  • Received:2022-03-03 Online:2023-03-29 Published:2023-03-28
  • Contact: Yiwen JIAO

Abstract:

Aiming at the real-time demand of high-speed data processing in digital down-conversion system, a digital down-conversion processing algorithm based on central processing unit(CPU)+graphics processing unit(GPU) is designed for heterogeneous platform, and the corresponding parallel programming is completed, and the actual data is verified. Since GPU computing using single precision floating point number format on data processing, for long time history in the process of data processing, can produce floating-point rounding error accumulation, not accurate and reliable results. A combined phase cycle zero and error-free transformation compensation method is designed, and the floating-point number rounding error control and compensation is realized. Data test results show that the proposed method can control the error within 10-11, and does not cumulative with time, and the calculation results are accurate and reliable.

Key words: graphics processing unit (GPU), round off error, cumulative error, error-free transformation

CLC Number: 

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