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6389057 |
Access technique of channel hopping communications system
Establishing a connection between a paging unit and a standby unit in a channel hopping communications system includes activating the standby unit for an activation time period out of every standby...
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EP1002374B1 |
METHOD AND DEVICE FOR PRODUCING A CARRIER FREQUENCY SEQUENCE
Abstract not available for EP1002374 Abstract of corresponding document: WO9909669 The invention concerns a method and a device for producing a carrier frequency sequence (Fx) for mobile...
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6098189 |
Relay station for wireless communication traffic
A relay station utilizes the frequency hopping principle for the purpose of protection against intentional interference. Normally, the frequency hopping range available cannot be utilized for the...
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5940431 |
Access technique of channel hopping communications system
Establishing a connection between a paging unit and a standby unit in a channel hopping communications system includes activating the standby unit for an activation time period out of every standby...
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4837823 |
Communication system
A frequency hopping communication system whose transmitters and receivers after synchronization hop over a frequency series of a first type. To synchronize the transmitters and receivers, sync data...
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4817141 |
Confidential communication system
The respective feature parameters extracted from a speech signal is converted into the corresponding line spectrum data in a first frequency band obtained by dividing the speech signal frequency...
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