Matches 201 - 226 out of 226 < 1 2 3 4 5
Match Document Document Title
5878034 Spacecraft TDMA communications system with synchronization by spread spectrum overlay channel  
In a time division multiple access spacecraft communication system, each ground station determines when to send its information packets to arrive at the spacecraft at the beginning of a time slot....
5878346 Nonterrestrial cellular mobile telecommunication network  
The multidimensional cellular mobile telecommunication system extends the usage of existing cellular mobile telecommunication radio frequencies allocated for ground-based communications to...
5878345 Antenna for nonterrestrial mobile telecommunication system  
The multidimensional cellular mobile telecommunication system extends the usage of existing cellular mobile telecommunication radio frequencies allocated for ground-based communications to...
5873036 Apparatus and method for improving cellular communication by associating users on a mobile platform with a common platform identifier  
A base station (BS) communicates with a plurality of mobile users in a platform. In one embodiment, the base station and mobile services center (MSC) associates all the mobile users with the...
5848359 Hierarchical set of frequency reuse patterns allowing cellular air and land communication  
A cellular system (FIG. 4) is expanded to allow communication between mobile ground-based units (70 and 72) and mobile air-based units (80 and 78) where the air base units (e.g., a unit in airplane...
5832380 Nonterrestrial cellular mobile telecommunication system  
The multidimensional cellular mobile telecommunication system extends the usage of existing cellular mobile telecommunication radio frequencies allocated for ground-based communications to...
5810284 Aircraft  
This disclosure provides a solar rechargeable aircraft that is inexpensive to produce, is steerable, and can remain airborne almost indefinitely. The preferred aircraft is a span-loaded flying...
5805683 System and method for routing ground-to-air telephone calls  
A system for completing calls to a passenger aboard an aircraft. The passenger activates ground-to-air service by accessing a ground-to-air database subsystem that is located on the ground. The...
5651050 Ground-to-air telephone calling system and related method for establishing a telephone link between a ground-based caller and a passenger on board an aircraft  
A ground-to-air telephone calling system is provided including a computer for receiving an airborne telephone number and a call-back number from a calling party and forming the telephone numbers...
5559865 Airborne radiotelephone communications system  
The airborne communication system enables one or more radiotelephones to communicate with a ground based cellular radiotelephone system. In the preferred embodiment, the aircraft is equipped with a...
5557656 Mobile telecommunications for aircraft and land based vehicles  
Aircraft communications are established on a cellular system by having the transmission to aircraft directed above ground level so as not to interfere with ground cellular systems and having the...
5455964 Stabilization of frequency and power in an airborne communication system  
The frequency and power of transmissions in a mobile communication system, such as an air-to-ground telephony system, are stabilized without a priori knowledge of the system gain factors or...
5444762 Method and apparatus for reducing interference among cellular telephone signals  
Directional antennae on aircraft and on cellular telephone base stations, having a polarity opposite that of potentially interfering ground system signals, minimize signal strength of air cellular...
5438610 Method for establishing a communication link between a ground-base caller and a passenger on board an aircraft  
A ground-to-air telephone calling system is provided including a computer for receiving an airborne telephone number and a call-back number from a calling party and forming the telephone numbers...
5428815 Communication system with geographic reuse dynamically sensitive to communication unit type  
Geographic reuse of frequencies within a multisite communication system are dynamically altered as a function of communication unit type. Since some communication unit types pose a smaller risk of...
5249303 Continuous reception by a mobile receiver unit of program channels transmitted by a series of transmitters  
A system and process for continuous reception of information by a mobile receiver unit passing among a plurality of spaced transmitters with each transmitter configured to individually transmit...
5212804 Communication system having multiple base stations and multiple mobile units  
An air-to-ground communications system is described for controlling multiple two way radiotelephone conversations between a large number of aircraft (53) and a network of base stations (51) that...
5123112 Air-to-ground communication system  
An air-to-ground communications system is described for controlling multiple two way radiotelephone conversations between a large number of aircraft (53) and a network of base stations (51) that...
5067172 Air to ground communications system and method  
An air-to-ground communications system wherein the communicating frequency channels are assigned dependent on the amplitude of the signals received at the base sites and dependent on the altitude...
5014342 Communication system employing a nine channel pattern allocation to eliminate interference  
In a communication system having a plurality of base stations for communication with mobile terminals, each station is allocated one of nine communication channels. The allocation is arranged such...
4903298 System for providing encryption and decryption of voice and data transmissions to and from an aircraft  
A data communication system for an aircraft includes a voice encryption unit that is selectably included in the audio path between a user and a radio. The data communication system is...
4870425 Communications system  
A communication system particularly adapted for use in an aircraft collision avoidance system wherein the transmitted portions of messages changed between aircraft consist of pulses or pairs of...
4434504 Channeling and decode circuit for airborne radio-telephone systems  
An airborne radio-telephone transceiver is provided having improved channeling and decode circuitry compatible with the selective signalling call-up system prescribed by the Federal Communications...
4419766 Methods and means for providing improved air/ground radio telephone communications  
An improved system and method for providing air/ground communications compatible with ground based telephone systems. The airborne equipment incorporates means for comparing signals received from...
4017799 High speed multiplex data transmission system  
5. A high-speed data transmission system comprising a central station, a plurality of control positions connected to said central station, a transmitter connected to said central station, an...
3859475 DECODER CHANNEL SELECTOR AND ENUNCIATOR SYSTEM IN AN AIRBORNE RADIOTELEPHONE SYSTEM  
An airborne radiotelephone system with push-to-talk operation that does not require the transmitter to be on continuously during a call. The system is all solid state with an electronic decoder...
Matches 201 - 226 out of 226 < 1 2 3 4 5