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.
Inventors
👤 Susumu Otani
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-24 13:48
CPC Classifications
H; H04; H04L; H04L1/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
165 words
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.
Claim 2
Dependent Claim
165 words
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.
Claim 3
Dependent Claim
33 words
A burst signal detection apparatus as claimed in claim 1, wherein the channel quality detector means includes means to compare input and output signals to the error-correcting decoder means for assessing channel quality.
Claim 4
Dependent Claim
34 words
A burst signal detection apparatus as claimed in claim 1, wherein the channel quality detector means includes means for sensing a decoding condition in the error-correcting decoder means in order to assess channel quality.