The Applications of SNAP2 National ASIC Design Engineering Center, - PowerPoint PPT Presentation

The Applications of SNAP2 National ASIC Design Engineering Center, Institute of Automation, Chinese Academy of Sciences 2017-08 presenter: Lin Shu on behalf of: Jie Hao, Jingbin Mu, Yafang Song, Liangtian Zhao, Chengcheng Li, Qiuxiang Fan, Hui Feng, Zhifeng Lv, Leichen Zhou, Sai Ma, Meiting Zhao, Dou Wang, Yuting Li email: jie.hao@ia.ac.cn lin.shu@ia.ac.cn 1

Overall Spectral Line Storage Pulsar Search FAST FRB Switch ADC FPGA Correlator CSRH GPU/CPU Beamformer sever

FAST

FAST

FPGA+GPU

Spectral Line Modes  high bandwidth mode  2000 MHz max bandwidth  Output channels: 64K, channel bandwidth ~30.5176kHz  Polarizations: full stokes  Output bits: 32 bits fixed  File format: SDFITS

 narrow bandwidth mode  Sample rate: 4000 MS/s  Integration: < 50s  selected 31.25 MHz, configurable mixer  Output bits: 32 float  Output channels: 64K, channel bandwidth ~0.488kHz  File format: SDFITS  Polarizations: full stokes

Result H1

Pulsar Search Modes  incoherent (offline de-dispersion)  2000 MHz max bandwidth  output channels: 2K, 4K, 8K, 16K, 32K, 64K channels  Dump rate: ~65us @ 2k, ~2ms @ 64k, bandwidth on 10 GbE port ~1 Gbps  Output bits: 8 bits  File format: PSRFITS

 coherent de-dispersion mode  800 MHz max bandwidth  2048 x 0.39MHz channels  File format: PSRFITS  256,1k, 2k, 4k, 8k profile bin  Output bits: 32 float  DM < 1200

FRB Search Modes (in progress)

Direct storage ADC SNAP2 FLASH array

Memory Board Memory Board  Capacity  Capacity • 72 pieces of eMMC NAND flash, • 72 pieces of eMMC NAND flash, each 64GB each 64GB • Total capacity 4TB • Total capacity 4TB  Bandwidth  Bandwidth • Write ： 1.2 GB/s • Write ： 1.2 GB/s • Read ： 1.6 GB/s • Read ： 1.6 GB/s  Interface(each FPGA)  Interface(each FPGA) • 8xGTX, QSFP connector, 4GB/s • 8xGTX, QSFP connector, 4GB/s (Rapid IO) (Rapid IO) • 10/100/1000 Ethernet • 10/100/1000 Ethernet • 8xGTX, ZD connector, 4GB/s • 8xGTX, ZD connector, 4GB/s (Rapid IO) (Rapid IO) • 10 LVDS, ZD connector • 10 LVDS, ZD connector  Process  Process • Xilinx XC7K325T-2FFG900 FPGA • Xilinx XC7K325T-2FFG900 FPGA • DDR3, 256 MB, 32bit/1066MHz • DDR3, 256 MB, 32bit/1066MHz

Storage Storage System  6U standard size, including one switch System  6U standard size, including one switch board, one interface board, the number board, one interface board, the number of memory board is based on the of memory board is based on the requirement of storage capacity requirement of storage capacity  Read/Write bandwidth 4GB/s, through  Read/Write bandwidth 4GB/s, through the parallel operation of multiple the parallel operation of multiple storage devices, a higher bandwidth storage devices, a higher bandwidth storage system can be constructed storage system can be constructed  Supported Features ： Bad block  Supported Features ： Bad block management, Wear-leveling, Garbage management, Wear-leveling, Garbage collection, ECC collection, ECC  T emperature ： -25 ~ 85 °C  T emperature ： -25 ~ 85 °C

CSRH in Inner Mongolia CSRH: Chinese Spectral Radio Heliograph

system requirement  40 antennas, dual polarization, 1~80 MHz  Sample rate: 8 bits @ 200 MHz  FFT channels: 2048, channel bandwidth: < 100 KHz  Output channels: Configurable  Integration: 10~100ms  two modes: beamforming mode and full correlation mode, working at the same time

System Design

Wide-band spectrometer  6 Gsps, 3 GHz bandwidth  6 Gsps, 3 GHz bandwidth • two interleaved 3 Gsps ADC • two interleaved 3 Gsps ADC  two modes  two modes • full bandwidth mode • full bandwidth mode • zoom mode • zoom mode  output (in frequency domain)  output (in frequency domain) • maximum value • maximum value • mid-value • mid-value • 10% value • 10% value • 90% value • 90% value

Thank you! 2 0