| 1. |
- Attari, Mohammad, et al.
(författare)
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A Floating-Point 16 × 16 SVD Accelerator for Beyond-5G Large Intelligent Surfaces
- 2023
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Ingår i: 2023 IEEE 66th International Midwest Symposium on Circuits and Systems, MWSCAS 2023. - 9798350302103 ; , s. 967-971
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Konferensbidrag (refereegranskat)abstract
- Beyond-5G wireless communication systems will feature advanced, key technologies such as large intelligent surfaces (LISs) composed of a very large number of antenna elements. The concomitant tremendous data rate requirements, due to the communication between these antennas, necessitate careful algorithm-architecture codesign. This paper presents an application-specific integrated circuit (ASIC) accelerator designed for efficient computation of singular value decomposition (SVD) utilized in distributed and scalable massive multiple-input multiple-output (MIMO) systems equipped with LISs. The design supports SVD calculation for 8 × 8 and 16 × 16 matrices and is synthesized using the GF -22nm fully depleted silicon-on-insulator (FD-SOI) technology with a clock frequency approaching 580 MHz. It takes up an area of 0.33 mm2 and consumes 219 mW of power. The system can pump out results at a cadence of 270/90 kSVDs/s, with a mean squared error (MSE) of 10-3, for 8 × 8 and 16 × 16 matrices, respectively.
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| 2. |
- Cheng, Sijia, et al.
(författare)
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A Hardware-in-the-Loop Simulator for mmWave Massive MIMO Using PYNQ Framework
- 2023
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Ingår i: 2023 IEEE 66th International Midwest Symposium on Circuits and Systems, MWSCAS 2023. - : Institute of Electrical and Electronics Engineers (IEEE). - 9798350302103 ; , s. 698-702
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Konferensbidrag (refereegranskat)abstract
- Massive multiple-input multiple-output (MIMO) plays an important role in beyond 5G systems to support high data rate and low latency, especially operating at millimeter-wave frequency bands. In traditional software-based simulators, the simulation time increases exponentially with the number of base station antennas and served users. We propose a hardware-in-loop simulator that combines the flexible software and fast and accurate hardware with Python Productivity for Zynq (PYNQ) framework. The simulation of massive MIMO detection is accelerated by 4 orders of magnitudes with bit-accurate result. With the help of the developed simulator, we explore the design trade-offs between system performance and hardware cost for in-flight-cabin use cases.
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| 3. |
- Ferreira, Lucas, et al.
(författare)
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Doubly-Block Circulant Kernel Matrix Exploitation in Convolutional Accelerators
- 2023
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Ingår i: 2023 IEEE 66th International Midwest Symposium on Circuits and Systems, MWSCAS 2023. - 9798350302103 ; , s. 236-240
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Konferensbidrag (refereegranskat)abstract
- In this paper, we present a novel algorithmic and hardware co-design approach specifically tailored for efficient 2D convolution implementations, a crucial operation in convolutional neural networks (CNNs). Our method addresses the limitations of existing software-based solutions and hardware-based architectures, delivering significant improvements in asymptotic behavior for generic convolution cases. By leveraging the distinctive geometry of doubly block circulant unrolled kernel matrices, our approach eliminates the need for input and weight buffers, optimizes output memory usage, and minimizes redundant memory accesses. A comprehensive comparative analysis with state-of-the-art techniques showcases the key advantages and superior performance of our proposed method, achieving substantial reductions in memory requirements and high throughput.
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| 4. |
- Karrari, Hamid, et al.
(författare)
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A High-Speed Comparator Using a New Regeneration Latch
- 2023
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Ingår i: 2023 IEEE 66th International Midwest Symposium on Circuits and Systems, MWSCAS 2023. - 9798350302103 ; , s. 624-628
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Konferensbidrag (refereegranskat)abstract
- This paper presents a high-speed comparator which employs a novel regeneration latch to enhance the comparison process. The regeneration stage employs an innovative mechanism that reduces the RC constant at the output while avoiding static power consumption. Furthermore, the proposed comparator is capable of operating seamlessly with a rail-to-rail input common-mode voltage. This is made possible by utilizing two preamplifiers working in parallel. To partially cancel out kickback noise, the proposed comparator also benefits from an intrinsic neutralization technique. The design was simulated in a 22-nm FD-SOI CMOS technology with a supply voltage of 0.8 V showing that the proposed comparator achieves a 17% decrease in delay compared to the fastest conventional topology simulated in this paper, while consuming the same amount of power.
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| 5. |
- Karrari, Hamid, et al.
(författare)
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A Technique to Increase the Linearity of the Bootstrapped Switch
- 2023
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Ingår i: 2023 IEEE 66th International Midwest Symposium on Circuits and Systems, MWSCAS 2023. - 9798350302103 ; , s. 1001-1004
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Konferensbidrag (refereegranskat)abstract
- We present a detailed investigation into a source of distortion that affects the classic bootstrapped switch. Our analysis reveals that the transition phase between track mode and hold mode is a critical factor in causing the distortion. To address this issue, we propose a novel technique that effectively mitigates the problem. Our results, based on simulations conducted using a 22-nm FDSOI CMOS process, show an improvement of at least 4 dB in the signal-to-distortion ratio, with only a minor reduction in signal bandwidth. Importantly, the increase in SDR is achieved with a minimum cost in terms of power consumption and area occupation.
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| 6. |
- Martensson, Billy, et al.
(författare)
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An Oscillator with Inductively Coupled Resonators for Readout of Stretchable Resistive Strain Sensor
- 2023
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Ingår i: 2023 IEEE 66th International Midwest Symposium on Circuits and Systems, MWSCAS 2023. - 9798350302103 ; , s. 177-181
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Konferensbidrag (refereegranskat)abstract
- This paper proposes a wireless and stretchable sensor which uses an oscillator with an inductively coupled resonator. By delving into the malleable nature of these cutting-edge electronics, we determine the most effective circuit parameters to optimize signal behavior for specific applications. The findings showed that the simulated frequency shift sensitivity to variations in sensor resistance in a simple NIC based oscillator circuit could be accurately modeled. The simulation was then confirmed by measurement with a reader circuit inductively coupled to a stretchable sensor. Further resistive strain experiments revealed a frequency shift of 132 Hz per 1% of strain in the sensor resistor, which is potentially high enough to measure and detect any physical phenomena that can induce strain on a human body, even down to the extremely small artery deformations caused by a pulse wave from the heart.
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