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

Patent 5727018 Issued on March 10, 1998. Estimated Expiration Date:

November 28, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Signal processing system having impulse response detecting circuit
Patent #: 4441192
Issued on: 04/03/1984
Inventor: Kita , et al.

Method and system for synchronizing the coding and decoding during the transmission of digital coded data
Patent #: 4553251
Issued on: 11/12/1985
Inventor: Hartmann

Synchronization system for use in direct sequence spread spectrum signal receiver
Patent #: 4567588
Issued on: 01/28/1986
Inventor: Jerrim

Code division multiplexer using direct sequence spread spectrum signal processing
Patent #: 4601047
Issued on: 07/15/1986
Inventor: Horwitz , et al.

System for improving signal-to-noise ratio in a direct sequence spread spectrum signal receiver
Patent #: 4644523
Issued on: 02/17/1987
Inventor: Horwitz

Method and apparatus for obtaining reliable synchronization over a noisy channel
Patent #: 4701939
Issued on: 10/20/1987
Inventor: Stutt , et al.

System and devices for transmitting signals consisting of data blocks
Patent #: 5146462
Issued on: 09/08/1992
Inventor: Cucchi

Pseudorandom (PN) signal synchronization circuit and related method
Patent #: 5199050
Issued on: 03/30/1993
Inventor: Linsky

Process for determining the quality parameters of transmission link for digital data streams having a cellular structure
Patent #: 5392314
Issued on: 02/21/1995
Inventor: Wolf

Process for the recovery of data transmitted over a transmission path for digital data streams using decoding by cross-correlation of a data sequence coded by cyclic shifting and inversion Patent #: 5504781
Issued on: 04/02/1996
Inventor: Wolf

Inventors

Assignee

Siemens Aktiengesellschaft

Application

No. 553447 filed on 11/28/1995

US Classes:

375/149, Having specific code synchronization370/515, Pseudo-random375/150, Correlation-type receiver375/367, Pseudo noise714/707Synchronization control

Examiners

Primary: Chin, Wellington
Assistant: Corrielus, Jean B.

Attorney, Agent or Firm

Kenyon & Kenyon

Foreign Patent References

0 408 936 EP. 01/12/1991
23 59 716 DE. 07/12/1979
40 12 850 DE. 10/12/1991
41 07 640 DE. 09/12/1992
41 21 480 DE. 02/12/1993

International Classes

H04B 001/69
H04B 003/46

Foreign Application Priority Data

1993-05-28 DE

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 (KKFa (n), KKFb (n) and KKFc (n)). The partial cross-correlation functions are added up to obtain a sum cross-correlation function (KKFs (n)). The sum cross-correlation function (KKFs (n)) is analyzed to detect the proper chronological occurrence of at least three maximums (ma, mb and mc). If the maximums (ma, mb and mc) do not occur at the proper times, a signal (synch) indicating a synchronization error is generated.