The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2012
Filed:
Mar. 25, 2009
Robert E. Rouquette, Covington, LA (US);
Clem B. Guillot, Iii, Thibodaux, LA (US);
Robert H. Kemp, Jr., Harahan, LA (US);
Dale J. Lambert, Mandeville, LA (US);
Daniel B. Seale, New Orleans, LA (US);
Robert E. Rouquette, Covington, LA (US);
Clem B. Guillot, III, Thibodaux, LA (US);
Robert H. Kemp, Jr., Harahan, LA (US);
Dale J. Lambert, Mandeville, LA (US);
Daniel B. Seale, New Orleans, LA (US);
Ion Geophysical Corporation, Houston, TX (US);
Abstract
A two-tier communication system for a seismic streamer. The communication system operates over an unshielded twisted-pair communication line extending the length of the streamer. Repeater units having a repeater function and a device controller function divide the twisted pair into line segments. Coils on each segment couple signals inductively to collocated external devices in a low-speed 2400 baud FSK data link between the devices and an associated device controller. A Gaussian 8-level FSK high-speed 60 kbit/s data link is established along all the segments with the repeaters re-transmitting boosted signals along the entire length of the communication line. The coils are transparent at the high-speed data rate. Time division multiple access (TDMA) or frequency division multiple access (FDMA) is used to accommodate the two links on the single twisted pair.