Excavating
Patent
1997-06-17
1999-02-16
Elmore, Reba I.
Excavating
371 55, 371 41, H04L 700
Patent
active
058727914
ABSTRACT:
A novel apparatus and method are provided for data communication over noisy media. The apparatus includes one or both of a transmitter circuit located at a transmitting location and a receiver circuit located at a receiving location. The data is encoded to provide error correction capabilities. The encoded signal is further modified by performing one or more linear mathematical operations in order to further randomize the data signal. The transmitter circuit thus generates a wideband spread spectrum signal based on the data which is to be transmitted, which spreads the signal and improves its immunity to noise. The coding used to spread the data signal may or may not be a function of the data itself. The present invention provides enhanced noise immunity without any resulting degradation in the operation and efficiency of the error correction coding. A synchronization circuit and method are also provided for quickly achieving fast, accurate synchronization utilizing parallel synchronization and sub-bit correlation. The error correction is used to correct hard and soft errors, and dynamically adjust the combination of hard and soft errors corrected in order to improve the overall data error correction.
REFERENCES:
patent: 5422890 (1995-06-01), Klingsporn et al.
patent: 5530705 (1996-06-01), Malone, Sr.
patent: 5687036 (1997-11-01), Kassab
patent: 5727004 (1998-03-01), Propp et al.
Propp David L.
Propp Michael B.
Adaptive Networks, Inc.
Brown Thomas E.
Elmore Reba I.
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