Inventor

CHANG DONALD C D

US189 patents

⚠️ This page may combine multiple inventors who share the name “CHANG DONALD C D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CHANG DONALD C D

DIRECTV GROUP INC

Multiple basestation communication system having adaptive antennas

Communication system using multiple link terminals for aircraft

Rapid user acquisition by a ground-based beamformer

Concurrent communications between a user terminal and multiple stratospheric transponder platforms

Stratospheric-based communication system for mobile users having adaptive interference rejection

Position location of multiple transponding platforms and users using two-way ranging as a calibration reference for GPS

Synchronization method and apparatus for multi-platform communication system

Phased array terminal for equatorial satellite constellations

Communication system using multiple link terminals

Communication system using multiple link terminals for aircraft

Multiple dynamic connectivity for satellite communications systems

GEO stationary communications system with minimal delay

Communication system employing reuse of satellite spectrum for terrestrial communication

Coherent synchronization of code division multiple access signals

Stratospheric platforms based mobile communications architecture

Architecture utilizing frequency reuse in accommodating user-link and feeder-link transmissions

Stratospheric-based communication system for mobile users using additional phased array elements for interference rejection

Communication system as a secondary platform with frequency reuse

HUGHES ELECTRONICS CORP

Communication system employing reuse of satellite spectrum for terrestrial communication

Method and system for determining a position of a communication satellite utilizing two-way ranging

Micro cell architecture for mobile user tracking communication system

Ground-based, wavefront-projection beamformer for a stratospheric communications platform

Multiple satellite mobile communications method and apparatus for hand-held terminals

Multiple satellite mobile communications method and apparatus for hand-held terminals

Satellite system and method of deploying same

Ground based beam forming utilizing synchronized code division multiplexing

Overlapping subarray patch antenna system

Communication system having frequency reuse in non-blocking manner

Signal processing circuit for communicating with a modular mobile satellite terminal and method therefor

Techniques for utilization of bandwidth space assets

Stratospheric platform system architecture with adjustment of antenna boresight angles

Ground-based, wavefront-projection beamformer for a stratospheric communications platform

Method for identifying growth limits of handheld services for mobile satellite communications

Modular mobile terminal for satellite communication

Method and system for incorporating two-way ranging navigation as a calibration reference for GPS

HUGHES AIRCRAFT CO

Dielectric loaded adjustable phase shifting apparatus

Polystatic correlating radar

Digital beam-forming technique using temporary noise injection

Adaptive antenna

Radiometer system incorporating a cylindrical parabolic reflector and minimum redundancy array feed

Aperture synthesized radiometer using digital beamforming techniques

Multiband gridded focal plane array antenna

Focal plane array antenna

CHANG DONALD C D

Concurrent airborne communication methods and systems

Coherent power combining for signals through multiple satellite communications channels

Communication system for dynamically combining power from a plurality of propagation channels in order to improve power levels of transmitted signals without affecting receiver and propagation segments

Architectures and methods for novel antenna radiation optimization via feed repositioning

Flexible multi-channel amplifiers via wavefront muxing techniques

Accessing LP transponders with CP terminals via wavefront multiplexing techniques

SPATIAL DIGITAL SYSTEMS INC

Systems for surveillance using airborne platforms as receiving platforms for bistatic radars