Shannon Wireless’ Post

Explore the World of Sampling Scopes and TDR Solutions with Pico Technology and Lambda Photometrics Ltd. Unravel the mysteries of high-speed digital systems and transmission lines? Let's dive into the dynamic realm of Sampling Scopes and Time-Domain Reflectometry (TDR) solutions. Sampling Oscilloscope Basics: At its core, a Sampling Oscilloscope discreetly samples input waveforms, making it a go-to for high-frequency or short-duration signals. Perfect for the fast-paced world of high-speed digital applications, where traditional scopes might falter. Integration with TDR: Enter Time-Domain Reflectometry (TDR), a technique involving rapid electrical pulses to unveil transmission line characteristics. Now, blend TDR with a Sampling Scope for a powerhouse duo. TDR identifies impedance variations, while the Sampling Scope delves into signal quality intricacies. https://lnkd.in/ewnCGWGe #SamplingScope #oscilloscope #highfrequency #TDR #Impedancemismatch #Highspeeddigitaldesign #telecommunications #Networking #aerospace #defence #opticalfiber #RF #microwave #lasertesting #semiconductors

We’re pleased to share that our latest paper has been published in IEEE Transactions on Vehicular Technology. The paper presents a solution to a limitation in spatial modulation (SM), where the number of transmit antennas must be a power of two. We propose a new transmission scheme, Golden Angle Modulation aided Fractional Spatial Modulation (GAM-FSM), which uses golden angle modulation (GAM) to allow for an arbitrary number of constellation points. Additionally, we’ve optimized geometric and probabilistic constellation shaping-aided GAM-FSM schemes. @Jing Zhu, @Lixia Xiao Pei Xiao Atta Quddus #SpatialModulation #GoldenAngleModulation #ResearchUpdate #IEEETVT #6G https://lnkd.in/eeHeNzjy

This paper describes the design and development of True Time Delay (TTD) based wide-Band Quad Transmit and Receive Module (W-QTRM) for EW, communication and Radar applications. Present high resolution imaging radars, high data rate communication systems requires high instantaneous bandwidths and EW applications require wide RF bandwidths. Active phased arrays employing T/R modules for such wide band application utilizes Time delay lines for beam steering in place of narrow band phase shifters. 

This work focuses on the minimization of interference from the neighboring cells through optimal resource allocation and power optimization. #Rate-#splitting #multiple #access (#RSMA) technique is employed where the message to be transmitted is divided into two parts. Two modes for resource allocation are formulated which aims to maximize the throughput under certain interference constraints. The radius of coverage expression is derived for switching of modes to take place. #Successive #interference #cancelation (#SIC) is introduced as a power constraint which enhances the overall performance of the network. Subsequently, Lagrange’s dual-optimization method is utilized for optimizing the #device-#to-#device (#D2D) transmit power and also lowering the computational complexity of the overall network. ---- Dr. Subhra Sankha Sarma, Ranjay Hazra, Pratik Goswami More details can be found at this link: https://lnkd.in/gFJU3pD3

Need end-to-end physical layer system simulation of NTN deployments, a channel model, and an advanced transceiver? Then check out our #EDA software solution to learn how you can simulate #NonTerrestrialNetwork #RF transmission performance and platform mobility: https://gag.gl/OAfiUX? The channel model includes all the propagation characteristics for satellite links, large path delay, and large-frequency Doppler shift—with satellite trajectory visualization. #3GPP #5G

Need end-to-end physical layer system simulation of NTN deployments, a channel model, and an advanced transceiver? Then check out our #EDA software solution to learn how you can simulate #NonTerrestrialNetwork #RF transmission performance and platform mobility: https://gag.gl/OAfiUX? The channel model includes all the propagation characteristics for satellite links, large path delay, and large-frequency Doppler shift—with satellite trajectory visualization. #3GPP #5G

Need end-to-end physical layer system simulation of NTN deployments, a channel model, and an advanced transceiver? Then check out our #EDA software solution to learn how you can simulate #NonTerrestrialNetwork #RF transmission performance and platform mobility: https://gag.gl/OAfiUX? The channel model includes all the propagation characteristics for satellite links, large path delay, and large-frequency Doppler shift—with satellite trajectory visualization. #3GPP #5G

This paper proposes using #Carrier #Sensing (#CS) for distributed interference management in #millimeter-#wave (#mmWave) cellular networks where spectrum is shared by multiple operators that do not coordinate among themselves. In addition, even the base station sites can be shared by the operators. The authors describe important challenges in using traditional CS in this setting and propose enhanced CS protocols to address these challenges. Using stochastic geometry, they develop a general framework for downlink coverage probability analysis of their shared mmWave network in the presence of CS and derive the downlink coverage probability expressions for several CS protocols. Their work is the first to investigate and analyze (using stochastic geometry) CS for mmWave networks with spectrum and BS sites shared among non-coordinating operators. They evaluate the downlink coverage probability of their shared mmWave network using simulations as well as numerical examples based on their analysis. ---- Shamik Sarkar, Xiang Zhang, Arupjyoti (Arup) Bhuyan, Mingyue Ji, Sneha Kumar Kasera More details can be found at this link: https://lnkd.in/dW_pEaxn

This article presented a beam pointing approaches for #uniform #hexagonal #array (#UHA) antennas using #Modified #Particle #Swarm #Optimization (#MPSO), for reducing the #sidelobe #level (#SLL) on finding the optimal current weights. The UHA antenna array with 19 cells fitted with 169 elements in the HAPs cellular structure is considered to simulate the proposed approach. Then, the MPSO approach is employed and compared with the standard PSO algorithm and #Uniform #Weighting (#UW) scheme. ---- Habib Mohammed (PhD), Konstantinos Katzis, Luzango Pangani Mfupe, Ephrem Teshale Bekele More details can be found at this link: https://lnkd.in/eNRQFjKB

In Safran - Navigation & Timing's latest technical note, we explore the importance of Pico Second Timing for High Energy Facilities. One of the crucial elements of any scientific installation, especially in particle accelerators and laser ignition facilities, is the timing system. Timing systems are used for providing a common notion of time to all the elements of the facility as well as for the generation of discrete triggering events and periodic signals needed by the various elements. In addition, it also can be used for radio frequency dissemination across the whole facility. In this note, we present the timing system architecture currently under development by Safran for the distribution of synchronized triggers. The hardware, based on FPGA, is described. The system allows total flexibility when configuring the triggers in terms of direction, number of pulses, pulse rate, pulse period and delay. #Safran #ResilientPNT #PNT #Timing #PicoSecondTiming