Transmitter synchronization in a distributed transmission system
AssigneeHarris Corporation
InventorsAnders S. Mattsson, Carlos Abascal
Life of this patent
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Abstract
Systems and methods are provided for synchronizing a plurality of transmitters in a distributed transmission system. A data source generates a digital signal. A central data processing component inserts synchronization data into the digital signal. The synchronization data includes a periodic reset signal. A plurality of radio frequency transmitters each comprises a Trellis coder. At least one Trellis coder state at each Trellis coder is reinitialized to a predefined default state in response to the reset signal.
Claims10
A distributed transmission system comprising:
- a data source that generates a digital signal;
- a central data processing component that inserts synchronization data into the digital signal, the synchronization data including a periodic reset signal;
- and
- a plurality of radio frequency transmitters, each transmitter comprising a Trellis coder, a first set of Trellis coder states at each Trellis coder being reinitialized to a predefined default state in response to the periodic reset signal and a second set of Trellis coder states being reinitialized to the predefined default state after a predetermined delay after the periodic reset signal is received at the Trellis coder.
A signal processing apparatus within a distributed transmission system, comprising:
- at least one Trellis coder that provides convolutional forward error correction to a digital signal;
- and
- a synchronization component that provides synchronization input to a plurality of components associated with the transmitter in response to synchronization data associated with the digital signal, the synchronization component instructing the Trellis coder to reset a current Trellis state of each of the at least one Trellis coder to a predetermined value during transmission of the signal in response to a reset signal associated with the synchronization data, the reset signal being provided to the synchronization component from a source external to the signal processing apparatus.
Dependencies are inferred from the claim text.