|
Match
|
Document |
Document Title |
|
|
6275678 |
Method and apparatus for determining an operating point of a non-linear amplifier of a communication channel
For determining the operating point of a non-linear amplifier 2 of a communication channel 1, for example of a transponder in a communication satellite, a first input signal I 1 is transmitted...
|
|
|
5953649 |
Signal acquisition in a satellite telephone system
In a telecommunications system, where the receiver must find a signal arranged in a regular pattern in frame periods (10) and further in slots (11) from among several possible frequencies, there is...
|
|
|
5949769 |
Multirate local multipoint data distribution system
A local multipoint data distribution system (10) simultaneously accommodates many communication sessions occurring at a wide variety of data rates. space surrounding cell sites (12) is partitioned...
|
|
|
5940433 |
Acquisition method and system of spreading code
In a mobile communication system using spread spectrum, performing respective multiplications of an I and Q channel signals by a spreading code replica, integration over one spreading code period,...
|
|
|
5659545 |
Apparatus for mobile unit acquisition in a satellite communication system and method therefor
To obtain service from a satellite communication system, a mobile subscriber unit must acquire a TDMA communication channel. Because the satellites move with respect to the surface of the earth,...
|
|
|
5383225 |
Synchronizer for TDMA acquisition signal having an unknown frequency
A synchronizer operates to achieve initial synchronization with a TDMA acquisition signal exhibiting a potentially large Doppler. The synchronizer collects samples of a baseband signal during a...
|
|
|
5353311 |
Radio transmitter
A radio transmitter suitable for a frequency hopping communication system which transmits a phase modulated signal with a minimum of spurious signals and phase noise. A direct digital frequency...
|
|
|
4513416 |
System for adjusting a time axis by using a control and an adjustment time slot in a satellite station of a TDMA network
In a TDMA network wherein a central station sends signals towards satellite stations in downward frames (A), each comprising a control time slot (Td0) and speech time slots (Td1 to TdM), and...
|
|
|
4488296 |
Time division multiple access system for transmitting an analog signal by the use of bursts without substantial interruption
In a time division multiple access system comprising a central station and a plurality of substations, a subsidiary analog signal is sampled at a sampling circuit of each substation M times...
|
|
|
4346470 |
Initial acquisition of synchronization for a station in a TDMA satellite communication network
A method and apparatus are disclosed for acquiring transmit synchronization at a secondary station with the periodic frame reference bursts from a reference station in a TDMA network in an improved...
|