| Presentation | 2023-03-03 A study of fast factorized backprojection on multiple GPUs for large-sized SAR imaging Masato Gocho, Masayoshi Tsuchida, Kazunori Ueda, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents a study of distributed parallel FFBP (fast factorized backprojection) on multiple GPUs for large-sized SAR (synthetic aperture radar) imaging, where signals and images do not fit in the GPU memory size. The FFBP is based on recursive subaperture divisions, and produces the low-resolution image for each subaperture. The produced subaperture images are recursively resampled and coherently summed to produce a high-resolution image. To parallelize such a imaging algorithm, a breadth-first recursive division is performed to simultaneously process all subapertures located at the same division-depth. At each division-depth, every subaperture signal and/or image is subdivided by CPU, and distributed from CPU to all GPUs. Each GPU processes the imaging or image-fusion on the GPU memory to produce new image. The prodoced images are gathered in CPU memory. Our parallel FFBP is configured by repeating the above procedure for each division-depth. In the case of FFBP imaging with $2^10$ subapertures for the 32768 pulses x2 channels, we found that 8 GPUs take 5.8 seconds, which is 24.9 times faster than 32-threaded CPUs, to produce 32768x32768 pixels. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | synthetic aperture radar / backprojection |
| Paper # | SANE2022-120 |
| Date of Issue | 2023-02-23 (SANE) |
| Conference Information | |
| Committee | SANE / SAT |
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| Conference Date | 2023/3/2(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Toshifumi Moriyama(Nagasaki Univ.) / Tetsushi Ikegami(Meiji Univ.) |
| Vice Chair | Makoto Tanaka(Tokai Univ.) / Takeshi Amishima(Meiji Univ.) / Masashi Kamei(NHK) / Takana Kaho(Shonan Inst. of Tech.) |
| Secretary | Makoto Tanaka(ENRI) / Takeshi Amishima(Mitsubishi Electric) / Masashi Kamei(NTT) / Takana Kaho(NICT) |
| Assistant | Shang Fang(Univ. of Electro-Comm) / Riichiro Nagareda(KDDI Research) / Yuuki Koizumi(NHK) |
| Paper Information | |
| Registration To | Technical Committee on Space, Aeronautical and Navigational Electronics / Technical Committee on Satellite Telecommunications |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A study of fast factorized backprojection on multiple GPUs for large-sized SAR imaging |
| Sub Title (in English) | |
| Keyword(1) | synthetic aperture radar |
| Keyword(2) | backprojection |
| 1st Author's Name | Masato Gocho |
| 1st Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| 2nd Author's Name | Masayoshi Tsuchida |
| 2nd Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric) |
| 3rd Author's Name | Kazunori Ueda |
| 3rd Author's Affiliation | Waseda University(Waseda Univ.) |
| Date | 2023-03-03 |
| Paper # | SANE2022-120 |
| Volume (vol) | vol.122 |
| Number (no) | SANE-408 |
| Page | pp.pp.118-123(SANE), |
| #Pages | 6 |
| Date of Issue | 2023-02-23 (SANE) |