TRANSMITTER AND RECEIVER SYNCHRONIZATION FOR WIRELESS TELEMETRY SYSTEMS

Title:

TRANSMITTER AND RECEIVER SYNCHRONIZATION FOR WIRELESS TELEMETRY SYSTEMS

Document Type and Number:

WIPO Patent Application WO/2012/131600

Kind Code:

A3

Abstract:

An acoustic modem for communication in a network of acoustic modems via a communication channel. The acoustic modem comprises a transceiver assembly, transceiver electronics, and a power supply. The transceiver assembly is adapted to convert acoustic messages into electrical signals. The transceiver electronics is provided with transmitter electronics and receiver electronics. The transmitter electronics cause the transceiver assembly to send acoustic signals into the communication channel. The receiver electronics comprises at least one microcontroller adapted to execute instructions to (1) enable the receiver electronics to receive electrical signals indicative of the acoustic message from at least one other acoustic modem via the transceiver assembly, (2) estimate a carrier frequency of the electrical signals by analyzing an estimation frame of the electrical signals, (3) estimate a starting time of a data frame of the electrical signals by synchronizing with a synchronization frame of the acoustic message in parallel with at least two bit rates, and (4) decode the data frame. The power supply supplies power to the transceiver assembly and the transceiver electronics.

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Inventors:

MILLOT GUILLAUME (FR)
FROELICH BENOIT (FR)

Application Number:

PCT/IB2012/051493

Publication Date:

November 21, 2013

Filing Date:

March 28, 2012

Export Citation:

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Assignee:

SCHLUMBERGER TECHNOLOGY BV (NL)
SCHLUMBERGER HOLDINGS
SCHLUMBERGER CA LTD (CA)
SCHLUMBERGER SERVICES PETROL (FR)
PRAD RES & DEV LTD
MILLOT GUILLAUME (FR)
FROELICH BENOIT (FR)

International Classes:

E21B47/16; H04B11/00

Domestic Patent References:

WO2011014389A2

2011-02-03

Foreign References:

EP2157279A1

2010-02-24

Attorney, Agent or Firm:

RZANIAK, Marcin et al. (IP-Administration High Cross Madingley Road, Cambridge Cambridgeshire CB3 0EL, GB)

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