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Starlink FCC Filings Part 5: Gen2 Satellite System Modifications — PFD Limits, EPFD Compliance & ITU Coordination

Technical analysis of SpaceX’s Gen2 satellite system modification filing: Ka-band PFD limits, Nv visibility calculations for 29,988-satellite constellation, ITU Article 22 EPFD compliance, GSO protection frameworks, and inter-system spectrum sharing methodologies.

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Starlink FCC Filings Part 4: Direct-to-Cell MSS Spectrum — 2GHz Band Parameters, Coverage & Interference Analysis

Technical breakdown of SpaceX’s Direct-to-Cell Mobile Satellite Service (MSS) filing: 2GHz and 2020-2025 MHz band operations, 7,500-satellite initial deployment, geographic coverage, PFD/EIRP limits, spectrum sharing with AWS-4 terrestrial operators, and frequency tolerance specifications.

Starlink FCC Filings Part 4: Direct-to-Cell MSS Spectrum — 2GHz Band Parameters, Coverage & Interference Analysis Read More »

Starlink FCC Filings Part 3: Gen1 Satellite System Modification — Ku/Ka-Band Beam Parameters & Spectrum Sharing

Technical analysis of SpaceX’s FCC modification application for its Gen1 satellite system: upgraded 4,408-satellite constellation, Ku-band and Ka-band beam parameters, GSO/NGSO spectrum sharing compliance, EPFD limits, PFD management, and co-frequency beam flexibility under modernized sharing frameworks.

Starlink FCC Filings Part 3: Gen1 Satellite System Modification — Ku/Ka-Band Beam Parameters & Spectrum Sharing Read More »

Starlink FCC Filings Part 2: 2GHz Spectrum Tests, E-Band Gateway Links & Orbital Data Center Constellation

Detailed analysis of SpaceX’s latest FCC filings: STA extensions for 2GHz spectrum testing with EchoStar, E-band gateway link renewals for Gen2 satellites, and a bold proposal for a million-satellite orbital data center constellation powered by solar energy to meet AI computing demands.

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SpaceX Starlink FCC Filings Series (1): Direct-to-Cell, E-Band Gateway, and Emergency SCS Authorizations (2026)

A comprehensive review of SpaceX Starlink’s recent FCC filings including direct-to-cell demonstrations in Guam, E-band gateway link extensions for Gen2 satellites, and emergency Supplemental Coverage from Space (SCS) operations during Typhoon Senlark.

SpaceX Starlink FCC Filings Series (1): Direct-to-Cell, E-Band Gateway, and Emergency SCS Authorizations (2026) Read More »

DJI Video Transmission Chip Evolution: From Leadcore SoC to P1/S1/S2 Custom ASICs

A technical history of DJI video transmission chips: from off-the-shelf Leadcore LC1860 SoC in early OcuSync, through customized P1 (Falcon) and S1 (Sparrow) ASICs, to the latest S2 chip supporting wider channel bandwidths. Covers DJI’s three-phase strategy from chip selection to specification definition, and the architectural differences between each generation.

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Silent Mode & TPC: Two Transmission Control Capabilities in Wireless Ad Hoc Networks

A technical guide to wireless ad hoc network transmission control: silent mode (controlled node transmit state switching) and TPC (Transmit Power Control) for dynamic link-quality-based power adaptation. Covers architecture, control vs. business signal separation, and engineering applications for reducing RF exposure and optimizing spectrum efficiency.

Silent Mode & TPC: Two Transmission Control Capabilities in Wireless Ad Hoc Networks Read More »

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