高性能FPGA处理器在叠前可希霍夫偏移中的应用

High performance FPGA-based coprocessor platform for accelerating Kirchhoff migration

笔者提出了SONIC可重新设置协处理器,它用来通过现场可编程(FPGA)技术加速三维叠前可希霍夫时间偏移(PSTM)。PSTM程序中费时最多的核心部分被编入基于FPGA的协处理器平台中。它作为一个硬件加速器附加在工作站上,通过并行合到一个FPGA芯片上来改善其运算性能。计算机模拟结果显示出SONIC平台在50MHz运行时,每秒钟可以计算5千万点的可希霍夫加法运算。这比参考的2.4GHz奔腾4工作站快15.6倍,该平台具有可重置性能,加上令人满意的运算速度,显示了它在地震数据处理业的广泛应用前途。

A reconfigurable coprocessor platform called SPACE (Seismic data Processing Accelerator with reConfigurable Engine) for speeding up 3D prestack Kirchhoff ray-bending time migration (PSTM) using Field Programmable Gate Array (FPGA) technology is proposed. The time-consuming kernel part of the PSTM procedure is programmed into the FPGA-based coprocessor platform, which acts as a hardware accelerator attached to an Intel-based workstation through the local Peripheral Controller Interface (PCI) bus. Improved performance can be achieved by integrating many parallel-running fully pipelined arithmetic units into a single FPGA chip. Our simulation shows that the SPACE platform operating at a conservative speed of 50 MHz can calculate the Kirchhoff summations for 50 million points per second, which is about 15.6 times faster than a referential 2.4 GHz Pentium 4 workstation. The reconfigurable property of the proposed platform combined with the impressive performance implies its broad applications in the seismic data processing industry.