US5727018A
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Process for obtaining a signal indicating a synchronization error between a pseudo-random signal sequence from a transmitter and a reference pseudo-random signal sequence from a receiver
Assignee: Tektronix Inc
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Filing: 1994-05-06
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Granted: 1998-03-10
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Expires: 2014-05-06
Abstract
Abstract A process may be implemented which obtains a signal indicating a synchronization error between a pseudo-random signal sequence from a transmitter and a reference pseudo-random signal sequence from a receiver in a measuring device on the receiving end. In order to be able to detect a synchronization error as quickly and reliably as possible, successive sections (a, b, c) of a reference pseudo-random signal sequence (g'(n)) are each cross-correlated separately with the received pseudo-random signal sequence (g(n)), yielding partial cross-correlation functions (KKF a (n), KKF b (n) and KKF c (n)). The partial cross-correlation functions are added up to obtain a sum cross-correlation function (KKF s (n)). The sum cross-correlation function (KKF s (n)) is analyzed to detect the proper chronological occurrence of at least three maximums (m a , m b and m c ). If the maximums (m a , m b and m c ) do not occur at the proper times, a signal (synch) indicating a synchronization error is generated.
Inventors
- 👤 Andreas Wolf
- 👤 Hans-Werner Arweiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:17
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/7073; H04B1/7075; H04B1/708; H04L; H04L7/00; H04L7/0079; H04L7/0083; H04L7/04; H04L7/041; H04L7/043; H04B1/70751
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
120 words
A process for obtaining a signal that indicates a synchronization error between a pseudo-random signal sequence from a transmitter and a reference pseudo-random signal sequence from a receiver by means of a measuring device on the receiving end, comprising steps of: a) separately cross-correlating successive sections of a reference pseudo-random signal sequence in succession with a received pseudo-random signal sequence yielding partial cross-correlation functions; b) adding the partial cross-correlation functions to yield a sum cross-correlation function; c) detecting maximums of the sum cross-correlation function and monitoring a chronological occurrence of the detected maximums; and d) if at least three detected maximums in the sum cross-correlation function do not appear at a predetermined time, generating a signal indicating a synchronization error.
Claim 2
Dependent Claim
120 words
A process for obtaining a signal that indicates a synchronization error between a pseudo-random signal sequence from a transmitter and a reference pseudo-random signal sequence from a receiver by means of a measuring device on the receiving end, comprising steps of: a) separately cross-correlating successive sections of a reference pseudo-random signal sequence in succession with a received pseudo-random signal sequence yielding partial cross-correlation functions; b) adding the partial cross-correlation functions to yield a sum cross-correlation function; c) detecting maximums of the sum cross-correlation function and monitoring a chronological occurrence of the detected maximums; and d) if at least three detected maximums in the sum cross-correlation function do not appear at a predetermined time, generating a signal indicating a synchronization error.
Claim 3
Dependent Claim
32 words
A process according to claim 1, further comprising a step of: e) cross-correlating successive sections of the reference pseudo-random signal sequence of approximately the same length with the received pseudo-random signal sequence.
Claim 4
Dependent Claim
27 words
A process according to claim 2, further comprising a step of: f) analyzing a value of the detected maximums and generating a signal indicating a bit error.
Claim 5
Dependent Claim
58 words
A process according to claim 3, further comprising steps of: g) monitoring the detected maximums of the sum cross-correlation function with regard to their chronological occurrence to detect a shift in a maximum by a predetermined interval of time; and h) upon detection of the predetermined interval, generating a status signal indicating that a bit slip is generated.
Claim 6
Dependent Claim
55 words
A process according to claim 4, further comprising steps of: i) monitoring the sum cross-correlation function with regard to the sequence of occurrence of the maximums in accordance with successive sections of the reference pseudo-random signal sequence; and j) when a disturbance in the sequence is detected, generating an alarm signal indicating a system error.
Claim 7
Dependent Claim
55 words
A process according to claim 3, further comprising steps of: i) monitoring the sum cross-correlation function with regard to the sequence of occurrence of the maximums in accordance with successive sections of the reference pseudo-random signal sequence; and j) when a disturbance in the sequence is detected, generating an alarm signal indicating a system error.
Claim 8
Dependent Claim
58 words
A process according to claim 2, further comprising steps of: g) monitoring the detected maximums of the sum cross-correlation function with regard to their chronological occurrence to detect a shift in a maximum by a predetermined interval of time; and h) upon detection of the predetermined interval, generating a status signal indicating that a bit slip is generated.
Claim 9
Dependent Claim
55 words
A process according to claim 7, further comprising steps of: i) monitoring the sum cross-correlation function with regard to the sequence of occurrence of the maximums in accordance with successive sections of the reference pseudo-random signal sequence; and j) when a disturbance in the sequence is detected, generating an alarm signal indicating a system error.
Claim 10
Dependent Claim
55 words
A process according to claim 2, further comprising steps of: i) monitoring the sum cross-correlation function with regard to the sequence of occurrence of the maximums in accordance with successive sections of the reference pseudo-random signal sequence; and j) when a disturbance in the sequence is detected, generating an alarm signal indicating a system error.
Claim 11
Dependent Claim
27 words
A process according to claim 1, further comprising a step of: f) analyzing a value of the detected maximums and generating a signal indicating a bit error.
Claim 12
Dependent Claim
58 words
A process according to claim 10, further comprising steps of: g) monitoring the detected maximums of the sum cross-correlation function with regard to their chronological occurrence to detect a shift in a maximum by a predetermined interval of time; and h) upon detection of the predetermined interval, generating a status signal indicating that a bit slip is generated.
Claim 13
Dependent Claim
55 words
A process according to claim 11, further comprising steps of: i) monitoring the sum cross-correlation function with regard to the sequence of occurrence of the maximums in accordance with successive sections of the reference pseudo-random signal sequence; and j) when a disturbance in the sequence is detected, generating an alarm signal indicating a system error.
Claim 14
Dependent Claim
55 words
A process according to claim 10, further comprising steps of: i) monitoring the sum cross-correlation function with regard to the sequence of occurrence of the maximums in accordance with successive sections of the reference pseudo-random signal sequence; and j) when a disturbance in the sequence is detected, generating an alarm signal indicating a system error.
Claim 15
Dependent Claim
58 words
A process according to claim 1, further comprising steps of: g) monitoring the detected maximums of the sum cross-correlation function with regard to their chronological occurrence to detect a shift in a maximum by a predetermined interval of time; and h) upon detection of the predetermined interval, generating a status signal indicating that a bit slip is generated.
Claim 16
Dependent Claim
55 words
A process according to claim 14, further comprising steps of: i) monitoring the sum cross-correlation function with regard to the sequence of occurrence of the maximums in accordance with successive sections of the reference pseudo-random signal sequence; and j) when a disturbance in the sequence is detected, generating an alarm signal indicating a system error.
Claim 17
Dependent Claim
55 words
A process according to claim 1, further comprising steps of: i) monitoring the sum cross-correlation function with regard to the sequence of occurrence of the maximums in accordance with successive sections of the reference pseudo-random signal sequence; and j) when a disturbance in the sequence is detected, generating an alarm signal indicating a system error.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2001-03-09 | 2001-09-08 | 2002-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-09 | 2005-09-08 | 2006-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-09 | 2009-09-08 | 2010-03-10 | $7700.00 | Window Closed / Lapsed |