MBDFB - PowerPoint PPT Presentation
1 / 8
Title:
MBDFB
Description:
4096 x 64 kHz sampled at 32 kHz. 2 bits x 32x10^3 x 4096 = 32 MBytes/second/beam ... 1.7 Teraflops for adds only! But cute tricks etc. Hardware: Casper? Other? ... – PowerPoint PPT presentation
Number of Views:35
Avg rating:3.0/5.0
Title: MBDFB
1
MBDFB
- Matthew Bailes
- Swinburne University
- Of
- Technology
2
Giant Pulses
Giant Pulse (02184232)
2 microseconds wide!
3
Profile Precision
Must be done with Coherent dedispersion
4
Incoherent FB limitations
- 2048 channels/ 512 MHz
- L-band
- Terzan 5
- 190 us Smearing!
- Still need coherent dedispersion
5
(No Transcript)
6
Smearing?
- 8.3 us x ChBW x DM / 4 ?
- _at_DM100, ChBW 3 MHz 907 us!
- More channels?
- 4096 x 64 kHz sampled at 32 kHz
- 2 bits x 32x103 x 4096 32 MBytes/second/beam
- Smearing _at_ DM 100 is 19 us.
7
Computation Time?
- 10,000 trial DMs per time sample!
- 4096 channels x 10,000 x 32kHz x 13
- 1.7 Teraflops for adds only!
- But cute tricks etc.
8
Hardware
- Casper?
- Other?
- Want voltages-samplers-gain control-PolyPhaseFB-Sq
rLawDetect-downsample-UDP-CPU.
