Method and apparatus for obtaining reliable synchronization over a noisy channel
First Claim
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1. A method for synchronizing a transmitter and a receiver in a synchronous serial transmission communication system comprising the steps of:
- serially transmitting a plurality of sync words encoded as code words of a forward error correction code, said works being transmitted in an interlaced fashion, corresponding bits of each word being transmitted in sequence,directing received bits of said sync words int different registers for processing, each register containing bits corresponding to a different word,decoding said sync words to provide decoded words; and
detecting by correlating techniques correspondence between a preselected number of said decoded words and a known reference to thereby establish synchronization between said receiver and said transmitter.
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Abstract
Method and apparatus for synchronizing a transmitter and a receiver in a synchronous serial transmission system by serially transmitting a plurality of pseudorandom, coded sync words in an interlaced fashion with corresponding bits of each word transmitted in sequence. At the receiver, received bits are first directed to a plurality of registers to undo the interlacing process and then decoded with the decoded word being compared by an autocorrelation technique to a known reference to thereby establish or reestablish synchronization between transmitter and receiver.
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Citations
13 Claims
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1. A method for synchronizing a transmitter and a receiver in a synchronous serial transmission communication system comprising the steps of:
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serially transmitting a plurality of sync words encoded as code words of a forward error correction code, said works being transmitted in an interlaced fashion, corresponding bits of each word being transmitted in sequence, directing received bits of said sync words int different registers for processing, each register containing bits corresponding to a different word, decoding said sync words to provide decoded words; and detecting by correlating techniques correspondence between a preselected number of said decoded words and a known reference to thereby establish synchronization between said receiver and said transmitter. - View Dependent Claims (2, 3, 4, 5)
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6. The apparatus for synchronizing a transmitter and a receiver in a synchronous serial transmission communication system comprising:
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means for serially transmitting a plurality of sync words encoded as code words of a forward error correction code, said words being transmitted in an interlaced fashion, corresponding bits of each word being transmitted in sequence, a plurality of data registers, means for directing received bits of said sync words into different of said registers for processing, each register containing bits corresponding to a different word, means for decoding said sync words to provide decoded words; and correlation means for detecting the correspondence between a preselected number of said decoded words and a known reference to thereby establish synchronization between said receiver and said transmitter. - View Dependent Claims (7, 8, 9, 10)
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11. A method of synchronizing a transmitter and a receiver in a synchronous serial transmission system comprising the steps of:
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transmitting with each message block a sync work encoded as a code word of the forward error correction code being employed for the message block; decoding said sync word at the receiver to provide a decoded sync word; and comparing said decoded sync word with a known reference to establish synchronization between said transmitter and receiver. - View Dependent Claims (12, 13)
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Specification