Method and system for undersampled symbol synchronization
First Claim
1. A method for providing a synchronization pattern for use in a communications system, the method comprising the steps of:
- generating a plurality of synchronization patterns, wherein each of the plurality of synchronization patterns differ from the other synchronization patterns by a time shift;
encoding an information signal with a plurality of headers, each header comprising one of the plurality of synchronization patterns; and
transmitting the encoded information signal over a communications system.
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Abstract
Described is a system and method for providing a synchronization pattern in a communication system. The method includes generating a synchronization pattern with good randomness properties; packing a signal for transmission with m headers, each header consisting of the synchronization pattern 1/m symbol-time shifted from the previous header; and transmitting the signal. A further method provides for the sampling the transmitted signal with m headers of symbol-time shifted synchronization patterns; and determining symbol timing offset by computing and reordering correlation peaks from the synchronization patterns. A system includes a transmitting system, a receiving system, and a data channel. The transmitted signal includes m headers with 1/m symbol-time shifted synchronization patterns.. The receiving system undersamples the transmitted signal with m synchronization patterns to simulate an oversampled synchronization pattern.
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Citations
31 Claims
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1. A method for providing a synchronization pattern for use in a communications system, the method comprising the steps of:
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generating a plurality of synchronization patterns, wherein each of the plurality of synchronization patterns differ from the other synchronization patterns by a time shift;
encoding an information signal with a plurality of headers, each header comprising one of the plurality of synchronization patterns; and
transmitting the encoded information signal over a communications system. - View Dependent Claims (2, 3, 4, 5)
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6. A method for providing symbol synchronization in a communications receiver, the method comprising;
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capturing a transmitted information signal comprising a plurality of synchronization patterns, wherein each synchronization pattern differs from the other synchronization patterns by a time shift;
generating a correlation peak from each of the plurality of synchronizations patterns; and
reordering the plurality of generated correlation peaks to provide a communications receiver symbol synchronization-offset pattern, whereby the receiver symbol synchronization-offset pattern simulates an oversampled synchronization pattern with improved signal to noise ratio over sampling at a higher sampling rate. - View Dependent Claims (7, 8, 9, 10)
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11. A method for symbol synchronization in a communication transmitter, the method comprising the steps of:
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generating a synchronization pattern;
encoding an information signal with m headers to provide an encoded information signal, wherein m is a positive integer and each header comprising the synchronization pattern, wherein after the first synchronization pattern, each synchronization pattern is shifted by a fraction of a symbol-time from the other synchronization patterns; and
transmitting the encoded information signal over a communication medium. - View Dependent Claims (12, 13, 14, 15)
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16. A method for symbol synchronization in a communication receiver, the method comprising the steps of:
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receiving an encoded information signal, wherein the encoded signal includes an information signal and m headers, wherein m is a positive integer and each header comprising a synchronization pattern, wherein after the first synchronization pattern, each synchronization pattern is shifted by a fraction of a symbol-time from the other synchronization patterns;
sampling the encoded information signal;
generating a correlation peak for each of the m transmitted synchronization patterns; and
reordering the m generated correlation peaks to provide a symbol synchronization-offset pattern, whereby the receiver symbol synchronization-offset pattern simulates an m times oversampled synchronization pattern with improved signal to noise ratio over m times receiver samplings. - View Dependent Claims (17, 18, 19)
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20. A system for providing a symbol synchronization pattern for use in communication systems, the system comprising:
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a generation system arranged to provide a symbol synchronization pattern; and
an encoding system arranged to provide an information signal with m headers, each header comprising the generated symbol synchronization pattern, wherein m is any positive integer, and each symbol synchronization pattern is shifted by a fraction of a symbol-time from the other synchronization pattern. - View Dependent Claims (21, 22, 23)
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24. A receiving system for providing a symbol synchronization-offset signal for use in a communications system, the receiving system comprising:
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a capturing system arranged to receive an information signal with a plurality of symbol synchronization patterns, wherein each of the plurality of synchronization patterns differ from the other synchronization patterns by a time shift;
a correlation generating system arranged to provide a correlation peak for each of the plurality of synchronization patterns; and
a symbol synchronization detecting system arranged to reorder the plurality of generated correlation peaks, such that a symbol synchronization-offset pattern is produced, whereby the symbol synchronization-offset pattern simulates an oversampled synchronization pattern with improved signal to noise ratio over true oversampled receiver samplings. - View Dependent Claims (25, 26, 27)
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28. A system for providing a symbol synchronization-offset signal for use in communication systems, comprising:
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a transmitting system arranged to provide a signal, wherein the signal includes a plurality of synchronization patterns, wherein each of the plurality of synchronization patterns differ from the other synchronization patterns by a time shift; and
a receiving system that is arranged to provide the symbol synchronization-offset signal, wherein the symbol synchronization-offset is produced by reordering a plurality of correlation peaks determined from the plurality of transmitted synchronization patterns, whereby the receiver symbol synchronization-offset pattern simulates an oversampled synchronization pattern with improved signal to noise ratio over true oversampled receiver samplings. - View Dependent Claims (29, 30)
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31. A computer-readable medium encoded with a data structure for providing a synchronization pattern for use in a communications system, the data structure comprising a plurality of data fields stored in a plurality of headers of a data packet, wherein each of the plurality of data fields comprises a synchronization pattern, wherein each synchronization pattern differs from the other synchronization pattern by a fractional symbol-time shift.
Specification