Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal
Patent
1994-03-30
1996-04-23
Chin, Stephen
Pulse or digital communications
Synchronizers
Frequency or phase control using synchronizing signal
H04L 700
Patent
active
055110991
ABSTRACT:
A digital communication system includes a data encoder responsive to a digital data stream for forming sequential data blocks from the digital data stream which are representative of information to be communicated. A synchronization data encoder responsive to the digital data stream, generates sequential sync blocks including synchronization data which are related to the sequential data blocks, as well as a prescribed digital sequence. A multiplexor responsive to the sequential data blocks and the sequential sync blocks, combines the blocks in an alternating manner so as to form a block-coded information signal. A modulator responsive to the block-coded information signal, provides a modulated block-coded information signal to a communication channel. A communication channel receiver includes a synchronization data recovery circuit responsive to the modulated block-coded information signal for detecting the prescribed digital sequence and providing at an output a reference signal in response to the detection. A demodulator responsive to the modulated block-coded information signal and the reference signal provided by the synchronization data recovery circuit demodulates the modulated block-coded information signal. Furthermore, a pre-demodulator phase-adjusting circuit is also responsive to the reference signal for adjusting the phase of the modulated block-coded information signal before its demodulation.
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Ko Jung-wan
Strolle Christopher H.
Chin Stephen
Kim Kevin
Samsung Electronics Co,. Ltd.
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