An efficient channelization architecture and its implementation for radio astronomy

Liu, W.; Meng, Qiao; Wang, C.; Zhou, Caihua; Yao, SM; Tariq, Irfan

doi:10.1088/1748-0221/16/08/p08047

Cited by 3 publications

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We implemented one RTD module on our Cascaded Reconfigurable Architecture Board (CRABoard) shown in Figures 8 and 9 (Liu et al 2021) to demonstrate the RT-PIDM works.…”

Section: Methodsmentioning

confidence: 99%

A Real-time, Pipelined Incoherent Dedispersion Method and Implementation in FPGA

Liu¹,

Meng²,

Wang³

et al. 2022

PASP

View full text Add to dashboard Cite

In pulsar observation, dispersion occurs due to the interstellar medium. The dispersion significantly affects the detection of pulsar signals. To overcome the dispersion effect, incoherent dedispersion methods are often applied. The tranditional inchoherent dedispersion methods are computationally expensive and troublesome. To deal with this problem, in this paper, we developed a Real-Time, Pipelined Incoherent Dedispersion Method (RT-PIDM). RT-PIMD only caches the summed-up time series, instead of all the frequency spectra, so the memory consumption is determined by the number of DM trails, whereas the traditional method’s memory consumption is determined by the number of frequency channels. In most of the situations, the number of frequency channels is several times more than that of DM trails, which means the memory consumption of traditional methods is more than that of RT-PIDM. With RT-PIDM, we designed a 1.2 GHz bandwidth prototype digital backend, and we finished pulsar observation with the 40 m radio telescope at Yunnan Observatory. The results demonstrate that the RT-PIDM can be implemented inside a single FPGA chip with less Block RAM, and the proposed RT-PIDM dedisperses the pulsar signal in real time and achieves the same result as compared to traditional incoherent dedispersion.

show abstract

“…We implemented one RTD module on our Cascaded Reconfigurable Architecture Board (CRABoard) shown in Figures 8 and 9 (Liu et al 2021) to demonstrate the RT-PIDM works.…”

Section: Methodsmentioning

confidence: 99%

A Real-time, Pipelined Incoherent Dedispersion Method and Implementation in FPGA

Liu¹,

Meng²,

Wang³

et al. 2022

PASP

View full text Add to dashboard Cite

show abstract

A 400 Gbit Ethernet Core Enabling High Data Rate Streaming from FPGAs to Servers and GPUs in Radio Astronomy

Liu,

Burnett,

Werthimer

et al. 2024

PASP

View full text Add to dashboard Cite

The increased bandwidth coupled with the large numbers of antennas of several new radio telescope arrays has resulted in an exponential increase in the amount of data that needs to be recorded and processed. In many cases, it is necessary to process this data in real time, as the raw data volumes are too high to be recorded and stored. Due to the ability of GPUs to process data in parallel, GPUs are increasingly used for data-intensive tasks. In most radio astronomy digital instrumentation (e.g., correlators for spectral imaging, beamforming, pulsar, fast radio burst and SETI searching), the processing power of modern GPUs is limited by the input/output data rate, not by the GPU's computation ability. Techniques for streaming ultra-high-rate data to GPUs, such as those described in this paper, reduce the number of GPUs and servers needed, and make significant reductions in the cost, power consumption, size, and complexity of GPU based radio astronomy backends. In this research, we developed and tested several different techniques to stream data from network interface cards (NICs) to GPUs. We also developed an open-source UDP/IPv4 400 GbE wrapper for the AMD/Xilinx IP demonstrating high-speed data stream transfer from a field programmable gate array (FPGA) to GPU.

show abstract

Radix-$N$ Algorithm for Computing $N^{2^{n}}$-Point DFT Approximations

Portella

Coelho

Bayer

et al. 2022

IEEE Signal Process. Lett.

View full text Add to dashboard Cite

An efficient channelization architecture and its implementation for radio astronomy

Cited by 3 publications

References 18 publications

A Real-time, Pipelined Incoherent Dedispersion Method and Implementation in FPGA

A Real-time, Pipelined Incoherent Dedispersion Method and Implementation in FPGA

A 400 Gbit Ethernet Core Enabling High Data Rate Streaming from FPGAs to Servers and GPUs in Radio Astronomy

Radix-$N$ Algorithm for Computing $N^{2^{n}}$-Point DFT Approximations

Contact Info

Product

Resources

About