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48th ieee International Conference on Acoustics, Speech and signal processing, ICASSP 2023

作者： Liu, Tao Chen, Zhengyang Qian, Yanmin Yu, Kai Shanghai Jiao Tong University MoE Key Lab of Artificial Intelligence Ai Institute X-LANCE Lab China

ISBN: (纸本)9781728163277

This paper presents the design and implementation of our system for Track 1 of the Multi-modal Information based Speech processing (MISP) 2022 Challenge. We design an end-to-end transformer-based multi-talker system. The transformer backbone is well-suited to capture long-term features, which is crucial for multi-modal speaker diarization in cases where temporal modalities are missing. Besides, we employ several loss functions and image data augmentation techniques to prevent over-fitting during training. Moreover, to further improve the system's performance, we incorporate Interchannel Phase Difference (IPD) to model the location features and pre-train an ECAPA-TDNN-based model to extract speaker embedding features. Our system achieved a diarization error rate (DER) of 10.82% on the evaluation set, which earned us second place in the audio-visual speaker diarization task of the MISP 2022 challenge. © 2023 ieee.

关键词： Speech processing

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A compact RF power inverter with reduced EMI for a CubeSat electrothermal micro-thruster 18

A compact RF power inverter with reduced EMI for a CubeSat e...

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ieee 18th workshop on Control and Modeling for Power Electronics (COMPEL)

作者： Liang, Wei Cui, Xiaofan Raymond, Luke Gu, Lei Charles, Christine Boswell, Rod Rivas-Davila, Juan Stanford Univ Stanford CA 94305 USA Univ Michigan Ann Arbor MI 48105 USA Australian Natl Univ Canberra ACT 2601 Australia

ISBN: (纸本)9781509053261

This paper presents a compact RF power inverter implemented with a PCB multi-resonant input filter for driving an electrothermal plasma micro-thruster, mini Pocket Rocket 3.0 (miniPR 3.0). This miniPR 3.0 and its driving electronics are part of an investigation seeking to add micro propulsion systems to low cost CubeSats. The proposed RF power inverter and multi-resonant input filter use only air core inductors. All inductors are toroidal and formed by PCB traces and vias allowing a planar and compact design [1], [2]. The PCB structure serves as structural support to save space and volume for propulsion propellant and other payloads. Advantages of air core inductors include not being subject to saturation or variations from changing material properties of a magnetic core, as well as no Curie temperature rating. With the previous development [3] of successfully driving the miniPR 3.0 with a compact PCB RF power inverter, this paper emphasizes on addressing some of the EMI concerns. A lumped transmission line multi-resonant input filter is proposed to mitigate conductive EMI. Specifically, we present an 8th order multi-resonant input filter design and demonstrate the converter and the filter successfully driving the miniPR 3.0.

关键词： Estimation Field programmable gate arrays OFDM Modulation Filtration Clocks signal processing algorithms

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Low-complexity MMSE receivers based on weighted matrix polynomials in frequency-selective MIMO systems

Low-complexity MMSE receivers based on weighted matrix polyn...

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8th International Symposium on signal processing and Its Applications

作者： Dietl, G Groh, I Utschick, W Tech Univ Munich Inst Circuit Theory & Signal Proc D-80333 Munich Germany

ISBN: (纸本)0780392434

Compared to the Matrix Wiener Filter (MWF), reduced-rank signal processing in the Minimum Mean Square Error (MMSE) sense is a well-known method for the design of low-complexity receivers. In this paper, we reveal the relationship between different reduced-rank receivers based on weighted matrix polynomials approximating the MWF in a Krylov subspace, viz., the MultiStage Matrix WF (MSMWF), the parallel implementation of Multi-Stage Vector WFs (MSVWFs), and Polynomial Expansion (PE). Besides, we present PE where the weights are approximated based on Random Matrix (RM) theory assuming the application to a frequency- selective Multiple-Input Multiple-Output (MIMO) system. Simulation results show that the MSMWF outperforms the considered reduced-rank methods if their order of computational complexity is the same.

关键词： signal receivers

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design, implementation and Analysis of Power Efficient Polyphase Multirate Filters 3

Design, Implementation and Analysis of Power Efficient Polyp...

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3rd International Conference on signal processing and Integrated Networks (SPIN)

作者： Gawande, Gopal S. Khanchandani, K. B. SSGM Coll Engineeing Elect & Telecommunicat Engn Dept Shegoan 444203 Maharashtra India

ISBN: (纸本)9781467391979

Multirate filtering technique is widely used for meeting the sampling rates of different systems and it is a powerful technique in DSP which results in low-cost implementations of digital filters. Polyphase decomposition technique reduces the computational complexity by adopting parallelism in multirate digital filters. Power consumption is always a prime design constraint while implementing multirate digital filters on reconfigurable hardware. Dynamic power consumption in digital implementations can be reduced by minimizing the switching activity at the output of CMOS gates. Most of the work is revolved around minimizing number of power of two or nonzero terms in the filter coefficients as each non-zero bit corresponds to an additional adder in hardware implementation. This paper proposes a novel algorithm to reduce the switching activity at the output of CMOS gate by reducing the number of nonzero terms in the filter coefficients. The proposed algorithm is applied to the polyphase structures and its impact on dynamic power consumption is analyzed. The structures are synthesized for Spartan6 FPGA board using Xilinx System Generator. The proposed algorithm reduces the power consumption up to 31 milli Watts for the polyphase structures.

关键词： Multirate filter Polyphase Structure POT Power consumption Lower bound Upper bound system generator FPGA MILP

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Adaptive Observer for a Class of Output-Delayed systems with Parameter Uncertainty - A PDE Based Approach

Adaptive Observer for a Class of Output-Delayed Systems with...

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12th IFAC workshop on Adaptation and Learning in Control and signal processing (ALCOSP)

作者： Ahmed-Ali, Tarek Giri, Fouad Krstic, Miroslav Lamnabhi-Lagarrigue, F. Univ Caen ENSICAEN GREYC Lab Caen France Univ Calif San Diego Dept Mech & Aerosp Engn La Jolla CA 92093 USA SUPELEC CNRS EECI Lab Signaux & Syst F-91192 Gif Sur Yvette France

The problem of state observation is addressed for a class of systems subject to sensor delay and parameter uncertainty. The unknown parameter vector enters a finite-dimensional state equation through a possibly output-dependent regressor. The sensor delay effect is captured by a first-order hyperbolic PDE. Doing so, the system turns out to be an ODE-PDE association with a connection point not accessible to measurements. An adaptive observer is constructed by combining ideas from PDE-based and ODE-based design approaches. The observer provides estimates of the ODE subsystem states and parameters, on the one hand, and of the sensor states, on the other. Observer exponential convergence is established under an ad-hoc persistent excitation condition involving the regressor. (C) 2016, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Delayed systems Hyperbolic PDE Adaptive observer Backstepping design

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Linear-Phase Delay Filters for Ultra-Low-Power signal processing in Neural Recording Implants

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ieee TRANSACTIONS ON BIOMEDICAL CIRCUITS AND systems 2010年第3期4卷 171-180页

作者： Gosselin, Benoit Sawan, Mohamad Kerherve, Eric Ecole Polytech Polystim Neurotechnol Lab Dept Elect Engn Montreal PQ H3C 3A7 Canada Univ Bordeaux IMS Lab F-33405 Talence France

We present the design and implementation of linear-phase delay filters for ultra-low-power signal processing in neural recording implants. We use these filters as low-distortion delay elements along with an automatic biopotential detector to perform integral waveform extraction and efficient power management. The presented delay elements are realized employing continuous-time OTA-C filters featuring 9th-order equiripple transfer functions with constant group delay. Such analog delay enables processing neural waveforms with reduced overhead compared to a digital delay since it does not requires sampling and digitization. It uses an allpass transfer function for achieving wider constant-delay bandwidth than all-pole does. Two filters realizations are compared for implementing the delay element: the Cascaded structure and the Inverse follow-the-leader feedback filter. Their respective strengths and drawbacks are assessed by modeling parasitics and non-idealities of OTAs, and by transistor-level simulations. A budget of 200 nA is used in both filters. Experimental measurements with the chosen filter topology are presented and discussed.

关键词： Cascaded filter inverse follow-the-leader feedback filter linear-phase delay filter neural signal processing neuroprostheses ultra-low-power OTA-C filters

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A high performance FPGA implementation of DES

A high performance FPGA implementation of DES

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ieee workshop on signal processing systems (SIPS)

作者： M. McLoone J.V. McCanny DSiPTM Laboratories School of Electrical and Electronic Engineering Queen''s University Belfast UK

FPGAs have proven to be very effective and efficient devices on which to implement encryption algorithms. They perform at much faster data-rates and provide better security than equivalent software implementations. They also provide more flexibility than ASIC implementations. This paper presents a high performance silicon intellectual property (IP) core for the data encryption standard (DES) encryption algorithm. The 16-stage pipelined DES design runs at an encryption rate of 3.87 Gbits/s using Xilinx Virtex FPGA technology making this the fastest single-chip DES FPGA implementation reported to date. This result is a factor 28 times faster than software implementations.

关键词： Field programmable gate arrays Cryptography Application specific integrated circuits Data security Laboratories Intellectual property Protocols Dynamic programming Throughput CMOS technology

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design and implementation of Receiver RF Module Based on MAX2771 4

Design and Implementation of Receiver RF Module Based on MAX...

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4th International Conference on Electronic Information Engineering and Computer Science, EIECS 2024

作者： Fu, Wentao Du, Wenhong Li, Youming Zhang, Jiayuan Zhang, Xiuhua Guangxi Institute of Industrial Technology for Space-Time Information Nanning China Guangxi Institute of Industrial Technology Nanning China

ISBN: (纸本)9798331531409

With the completion of GPS, GLONASS, BDS, and GALILEO navigation systems, the navigation and positioning technology has gradually developed toward multi-frequency and multi-system convergence. The RF module directly affects the baseband signal processing of the receiver. In recent years, the design and requirements of the RF module tend to be miniaturized, integrated, and cost-effective. In this paper, Maxim's multi-band universal GNSS receiver MAX2771 is used as the core of the RF module. According to the navigation signal receiving design requirements, the circuit design and parameter test of the RF module are completed. Through the satellite signal acquisition program developed by MATLAB platform, the verification RF module can realize satellite signal acquisition of GPS L1 and similar frequency points BDS B1 and GPS L2C, which is suitable for signal processing of navigation receiver. © 2024 ieee.

关键词： MATLAB

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Estimating the Ambulatory Center of Mass during Load Carriage using a Geometric Approach

Estimating the Ambulatory Center of Mass during Load Carriag...

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ieee workshop on Advanced Robotics and its Social Impacts (ARSO)

作者： Barrios, Luenin Shen, Wei-Min Univ Southern Calif Polymorph Robot Lab Informat Sci Inst Los Angeles CA 90007 USA

ISBN: (纸本)9781509004768

Research of load carriage effect on center of mass(CoM) behavior during human and robot locomotion has been driven by the prevalence of everyday tasks requiring load bearing or transfer. More recently, this has been accentuated in the design of exoskeletons and military backpack systems aimed at assisting with weighty load handling. Despite this importance, complicated body dynamics has stymied the study of CoM and locomotion behaviors that arise under heavy load carrying. Current approaches have focused mostly on force sensor use, video motion analysis or accelerometer data, constraining the methods to expensive and clumsy external sensors. In this work, a direct and accessible geometric approach is used and extended to produce CoM estimates of natural walking locomotion with carried loads over rough planar terrains. The approach makes use of an Optimized Geometric Hermite(OGH) curve and relies only on essential body kinematic knowledge, the terrain geometry, and load weight information. To validate the accuracy of the approach, comparisons using motion capture video of human subjects were performed. The results demonstrate an accurate estimate of the CoM position path and behavior during loaded natural walking over rough planar terrains.

关键词： Estimation Field programmable gate arrays OFDM Modulation Filtration Clocks signal processing algorithms

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design and Performance Analysis of a Frequency Modulation (FM) Transmitter: Integrating Voltage-Controlled Oscillator and Class AB Power Amplifier 6

Design and Performance Analysis of a Frequency Modulation (F...

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6th ieee International Conference on Civil Aviation Safety and Information Technology, ICCASIT 2024

作者： Miao, Haoxu Shandong University of Science and Technology Department of Electrical Information Jinan250031 China

ISBN: (纸本)9798350389418

This paper designs a frequency modulation (FM) transmitter for wireless communication systems, focusing on the design and implementation of the carrier oscillator circuit, high-frequency power amplifier, and audio amplifier. After comparing various options, a voltage-controlled oscillator (VCO) was ultimately selected for the carrier oscillator. The high-frequency power amplifier section employs a Class AB power amplifier to strike a balance between efficiency and linearity, and Multisim was used for simulation testing, ultimately achieving the expected values. The audio amplifier is responsible for the preliminary amplification of the input audio signal to ensure that the signal has a sufficient amplitude for subsequent processing. This paper elaborates on the design process of each part of the circuit, key technical parameters, and their specific roles in the system, ultimately realizing an efficient, stable, and reliable FM transmitter, providing an effective solution for wireless communication systems. © 2024 ieee.

关键词： High frequency amplifiers

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