A 480MHz ROACH-2 FPGA realization of 2-phase 2-D IIR beam filters for digital RF apertures

Seneviratne, Vishwa; Madanayake, Arjuna; Bruton, L.T.

doi:10.1109/mercon.2016.7480126

Cited by 2 publications

(4 citation statements)

References 18 publications

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“…The filter coefficients are given by β = α 2 − 1 and γ k = β k−1 (1 + β) for k = 1, 2, ..., M defined in terms of β [19]. The polynomial term in the numerator represents the LA optimized terms for pre-defined number of polyphases.…”

Section: Polyphase Differential-form Transfer-functionmentioning

confidence: 99%

“…Each ADC input can sample signals at a rate of 960 MSamples/s at the highest demux setting of 4. However, for our simulations, we feed in the data to the beam filter using ROACH-2 memory blocks (Shared BRAM) for the polyphased inputs using a similar technique as described in [19]. A single HMCAD1520 ADC chip [35] is capable of operating at multiple sampling rates depending on the number of ADC inputs used.…”

Section: System Architecturementioning

confidence: 99%

“…However, ROACH-2 multi-channel ADC cards have restrictions in maximum achievable sampling frequencies with an upper bound of 240 MSamples/s when all 16 inputs are enabled, thus limiting the maximum beamformer operating frequency at 240 MHz. In order to overcome these limitations, the authors in [19] proposed the use of multirate signal processing [20][21][22] to increase the real-time computational throughput at the cost of circuit complexity by parallel processing [23]. By using polyphase structures [21] in the temporal feedback loop in the IIR beam filter, it is possible to achieve an increase in operating frequency by a factor of the number of M polyphases.…”

Section: Introductionmentioning

confidence: 99%

“…By using polyphase structures [21] in the temporal feedback loop in the IIR beam filter, it is possible to achieve an increase in operating frequency by a factor of the number of M polyphases. The authors in [19] describe a multirate 2D IIR RF beamformer realized on ROACH-2 with two polyphases that can operate at a frequency of 480 MHz.…”

Section: Introductionmentioning

confidence: 99%

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Multidimensional-DSP Beamformers Using the ROACH-2 FPGA Platform

2017

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Antenna array-based multi-dimensional infinite-impulse response (IIR) digital beamformers are employed in a multitude of radio frequency (RF) applications ranging from electronically-scanned radar, radio telescopes, long-range detection and target tracking. A method to design 3D IIR beam filters using 2D IIR beam filters is described. A cascaded 2D IIR beam filter architecture is proposed based on systolic array architecture as an alternative for an existing radar application. Differential-form transfer function and polyphase structures are employed in the design to gain an increase in the speed of operation to gigahertz range. The feasibility of practical implementation of a 4-phase polyphase 2D IIR beam filter is explored. A digital hardware prototype is designed, implemented and tested using a ROACH-2 Field Programmable Gate Array (FPGA) platform fitted with a Xilinx Virtex-6 SX475T FPGA chip and multi-input analog-to-digital converters (ADC) boards set to a maximum sampling rate of 960 MHz. The article describes a method to build a 3D IIR beamformer using polyphase structures. A comparison of technical specifications of an existing radar application based on phased-array and the proposed 3D IIR beamformer is also explained to illustrate the proposed method to be a better alternative for such applications.

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Section: Polyphase Differential-form Transfer-functionmentioning

confidence: 99%

Section: System Architecturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multidimensional-DSP Beamformers Using the ROACH-2 FPGA Platform

2017

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Field Programmable Gate Array Applications—A Scientometric Review

2019

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Field Programmable Gate Array (FPGA) is a general purpose programmable logic device that can be configured by a customer after manufacturing to perform from a simple logic gate operations to complex systems on chip or even artificial intelligence systems. Scientific publications related to FPGA started in 1992 and, up to now, we found more than 70,000 documents in the two leading scientific databases (Scopus and Clarivative Web of Science). These publications show the vast range of applications based on FPGAs, from the new mechanism that enables the magnetic suspension system for the kilogram redefinition, to the Mars rovers’ navigation systems. This paper reviews the top FPGAs’ applications by a scientometric analysis in ScientoPy, covering publications related to FPGAs from 1992 to 2018. Here we found the top 150 applications that we divided into the following categories: digital control, communication interfaces, networking, computer security, cryptography techniques, machine learning, digital signal processing, image and video processing, big data, computer algorithms and other applications. Also, we present an evolution and trend analysis of the related applications.

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A 480MHz ROACH-2 FPGA realization of 2-phase 2-D IIR beam filters for digital RF apertures

Cited by 2 publications

References 18 publications

Multidimensional-DSP Beamformers Using the ROACH-2 FPGA Platform

Multidimensional-DSP Beamformers Using the ROACH-2 FPGA Platform

Field Programmable Gate Array Applications—A Scientometric Review

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