ALLPCB
High-Speed Rail Mobile Communication: Evolution and Challenges
Technical overview of rail mobile communication: transition to LTE?R and 5G?R, core challenges (Doppler, penetration loss, handovers) and engineering mitigation strategies.
Mobile Base Stations: Cells, Sectors, Carriers Explained
Technical overview of base stations, cells, sectors, and carriers: explains antenna sites, sector vs. cell distinctions, and how carrier and carrier frequency define logical cells.
iPhone 15 Series Teardown Highlights
iFixit teardown translation of the iPhone 15 Pro Max: internal design, USB?C, A17 Pro, titanium frame, camera and battery analysis, and repairability impacts.
3GPP NTN Frequency and Bandwidth Requirements
Technical summary of NTN frequency and bandwidth requirements in 3GPP Release 17, covering satellite bands (n255/n256), channel bandwidths, NRB/SCS and IoT NTN UE categories.
Cellular Mobile Communication and Network Architecture
Overview of cellular mobile communication architecture, covering base stations, BSC/MSC, frequency reuse, mobility, handover, and dynamic resource allocation.
Classic Mobile Operating Systems
Historical overview of mobile operating systems (1973–2007), detailing milestones from early PDAs and smartphones to Symbian's rise and market shifts.
OLED Display: Key Advantages and Disadvantages
Technical summary of OLED displays' advantages (thin, flexible, wide viewing angle, true blacks, fast response) and disadvantages (shorter lifetime, burn-in, cost).
Differences Between 5GHz Wi-Fi, Wi-Fi 6, and Wi-Fi 5
Technical overview of 5 GHz Wi?Fi vs 2.4 GHz, comparison of 5G cellular bands with Wi?Fi/Wi?Fi 6, and compatibility considerations for Wi?Fi 5 extenders.
PyTorch Edge: Deploying AI Models on Edge Devices
ExecuTorch technical overview: PyTorch ahead-of-time compilation, fx-style graph export, lowering and quantization, backend delegation, .pte executable format and runtime.
3GPP NTN RF Standards Overview
Overview of 3GPP NTN RF standards covering IoT-NTN and NR-NTN, satellite payload modes (transparent and regenerative), SAN/UE RF requirements and conformance tests.