Communications – electrical: acoustic wave systems and devices – Underwater system – Telemetering
Patent
1998-11-25
2000-10-10
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Underwater system
Telemetering
340850, 367904, H04B 1100
Patent
active
061308595
ABSTRACT:
An underwater apparatus for transmitting and receiving high rate data and voice communication including a transmitter, a receiver, and a Doppler frequency shift compensator. The transmitter includes a data source comprising digital data to be transmitted by the apparatus through the water, a serial-to-parallel data processor for splitting the serial digital data into n parallel data channels, a n-channel modulator for receiving the n parallel data channels and for modulating those channels with n pairs of ultrasonic carriers to produce a modulated signal. The transmitter also includes a hydrophone for receiving and transmitting the modulated signal. The receiver includes a hydrophone for receiving a modulated signal. The receiver also includes RF circuitry for amplifying and shaping the received modulated signal, a serial-to-parallel data processor for splitting the amplified and shaped data into n parallel channels, a n-channel demodulator for demodulating the shaped signal and for outputting n channels of digital data, and a parallel-to-serial data processor for receiving n parallel channels of data from the demodulator and for combining those channels into serial data. The Doppler compensator measures the frequency of at least one of two unmodulated signals transmitted as part of the modulated signal and compares the measured frequency with a predetermined frequency. Operation of the demodulator is adjusted to compensate for any deviation between the measured and predetermined frequency.
REFERENCES:
patent: 4463452 (1984-07-01), Chase, Jr.
patent: 5018114 (1991-05-01), Mackelburg et al.
patent: 5124955 (1992-06-01), Jackson et al.
patent: 5301167 (1994-04-01), Proakis et al.
patent: 5392771 (1995-02-01), Mock et al.
patent: 5432754 (1995-07-01), Brady et al.
patent: 5530682 (1996-06-01), Brosow
patent: 5548582 (1996-08-01), Brajal et al.
patent: 5784339 (1998-07-01), Woodsum et al.
Baggeroer et al., "DATS--A Digital Acoustic Telemetry System for Underwater Communications" Oceans '81, Conference Record, The Ocean, Boston Mass, pp. 55-60, Sep. 1981.
S. Coatelan et al., "Design and Test of a Multicarrier Transmission System on the Shallow Water Acoustic Channel", IEEE, 1994, pp. III-472-476.
D. Thompson, et al., "Performance of Coherent PSK Receivers using Adaptive Combining, Beamforming and Equalisation in 50k, Underwater Acoustic Channels", IEEE, Aug. 1996, pp. 845-50.
Elie Bejjani et al., "Multicarrier Coherent Communications for the Underwater Acoustic Channel", IEEE, Aug. 1996, pp. 1125-30.
W.K. Lam et al., "A Frequency Domain Adaptive Coded Decision Feedback Equalizer for a Broadband UWA COFDM System", IEEE, Jun. 1998, pp. 794-99.
J.J. Davies et al., "UW Communication System Design for Severely Dispersed Channels", IEEE, Jun. 1998, pp. 1022-27.
Dominique Albonico et al., "Test of an High Data Rate Acoustic Link in Shallow Water", IEEE, Jun. 1998, pp. 1028-32.
Craig P. Sayers, et al., "Teleprogramming for Subsea Teleoperation Using Acoustic Communication", IEEE Journal of Oceanic Engineering, vol. 23, No. 1, Jan. 1998, pp. 60-71.
Bryan Woodward et al., "Digital Underwater Acoustic Voice Communications", IEEE Journal of Oceanic Engineering, vol. 21, No. 2, Apr. 1996, pp. 181-92.
Rodney F.W. Coates, et al., "Bass 300 Paracom", IEEE Journal of Oceanic Engineering, vol. 21, No. 2, Apr. 1996, pp. 225-232.
Adam Zielinski et al., "Performance Analysis of Digital Acoustic Communication in a Shallow Water Channel", IEEE Journal of Oceanic Engineering, vol. 20, No. 4, Oct. 1995, pp. 293-99.
Anthony G. Bessios, et al., "Fast Underwater Acoustic Data Link Design Via Multicarrier Modulation and Higher-Order Statistics Equalization", pp. 594-99.
J.C. Jones, et al., The Design and Testing of a DSP, Half-Duplex, Vertical, DPSK Communication Link, IEEE, Feb. 1997, pp. 259-266.
W.K. Lam, et al., "A Broadband UWA Communication System Based on CODM Modulation", IEEE, Feb. 1997, pp. 862-69.
Lee Freitag et al., "A Bidirectional Coherent Acoustic Communication System for Underwater Vehicles", IEEE, Jun. 1998, pp. 482-86.
Maurice Green, et al., "Underwater Acoustic Modem Configured for use in a Local Area Network", IEEE, Jun. 1998, pp. 634-638.
Doris Carvalho, et al., "The Results of Several Acoustic Telemetry Tests in both Shallow and Deep Water", pp. 604-614.
Milica Stojanovic, et al., "Phase-Coherent Digital Communications for Underwater Acoustic Channels", IEEE Journal of Oceanic Engineering, vol. 19, No. 1, Jan. 1994, pp. 100-111.
Coatelan et al.,: "Design and test . . . acoustic channel," Oceans 95 MTS/IEEE, vol. 3, Oct. 9-12, 1995, pp. 2065-2070, XP002080999, San Diego, CA, US.
Lam et al.: "A coherent COFDM . . . acoustic channel," 7.sup.th International Conf. On EE in Oceanography, Jun. 23-25, 1997, pp. 198-203, OP 002081000, Southampton, UK.
Sonnenschein Elazar
Sonnenschein Menashe
Wulich Dov
Divecom Ltd.
Lobo Ian J.
LandOfFree
Method and apparatus for carrying out high data rate and voice u does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for carrying out high data rate and voice u, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for carrying out high data rate and voice u will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2261914