Burst signal detection apparatus
First Claim
1. A burst signal detection apparatus, comprising:
- a unique word detector means for receiving a burst signal of the type comprising a unique word followed by data that has undergone a cyclic redundancy check coding and error-correction coding and for detecting the unique word from the burst signal;
an error-correcting decoder means for decoding an error-correction code used with the data;
a cyclic redundance check detector means for receiving decoded data from the error-correcting decoder for detecting any cyclic redundance check error;
a channel quality detector means for detecting quality of the channel on which the burst signal is received; and
an output circuit for providing an output signal indicating presence or absence of error in the data in response to outputs of the unique word detector means, the cyclic redundancy check detector means, and the channel quality means;
the output circuit comprising an AND gate with inputs from the word detector means, the cyclic redundance check error detector means, and the channel quality detector means.
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Abstract
An apparatus for detecting burst signals used in satellite communication, for example, detects burst signals of the type comprising a unique word followed by a series of data. The burst signals are of the type that have undergone cyclic redundancy check (CRC) coding and error-correction coding. A unique word detector detects the unique word in the burst signal. An error-correcting decoder decodes the error-correction code used with the data. Two forms of error detection are used to reduce the possibility of erroneous data being mistakenly considered error-free. A cyclic redundancy check error detector detects any CRC error in the decoded data. A channel quality detector detects quality of the channel on which the burst signal is received. An output circuit provides an output signal indicating presence or absence of error in the data in response to outputs of the unique word detector, the CRC error detector, and the channel quality detector.
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Citations
3 Claims
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1. A burst signal detection apparatus, comprising:
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a unique word detector means for receiving a burst signal of the type comprising a unique word followed by data that has undergone a cyclic redundancy check coding and error-correction coding and for detecting the unique word from the burst signal; an error-correcting decoder means for decoding an error-correction code used with the data; a cyclic redundance check detector means for receiving decoded data from the error-correcting decoder for detecting any cyclic redundance check error; a channel quality detector means for detecting quality of the channel on which the burst signal is received; and an output circuit for providing an output signal indicating presence or absence of error in the data in response to outputs of the unique word detector means, the cyclic redundancy check detector means, and the channel quality means; the output circuit comprising an AND gate with inputs from the word detector means, the cyclic redundance check error detector means, and the channel quality detector means. - View Dependent Claims (2, 3)
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Specification
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- Resources
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Current AssigneeNEC Corporation
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Original AssigneeNEC Corporation
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InventorsOtani, Susumu
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Primary Examiner(s)Smith, Jerry
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Assistant Examiner(s)Baker, Stephen M.
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Application NumberUS07/077,163Time in Patent Office1,194 DaysField of Search371/5, 371/37.1-37.7, 371/39, 371/40, 371/41, 371/42, 371/43, 371/44, 371/45, 371/46, 371/47, 375/114, 375/104, 375/102, 375/99, 370/100US Class Current714/755CPC Class CodesH04L 1/00 Arrangements for detecting ...
