Patent ID: 11923911
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An underwater acoustic communication system, comprising:
a transmission device including N (N is an integer of two or more) transmitters; and
a reception device, wherein
the reception device comprises:
M (M is an integer of two or more) receivers configured to receive M reception signal sequences corresponding to N transmission signal sequences transmitted from the N transmitters through sound waves;
a beam former configured to suppress multipath waves other than direct waves of the M received reception signal sequences and to generate L (L is an integer of two or more) signal sequences from the M reception signal sequences; and
a signal estimator configured to estimate the N transmission signal sequences based on the L generated signal sequences,
wherein each of the N transmitters, the M receivers, the beam former and the signal estimator is implemented by:
i) computer executable instructions executed by at least one processor,
ii) at least one circuitry or
iii) a combination of computer executable instructions executed by at least one processor and at least one circuity,
wherein a result value obtained by multiplying an interval of the transmitters and an interval of the receivers is an integer multiple of a result value obtained by dividing a result value obtained by multiplying a wavelength of the sound waves and a distance between the transmitters and the receivers, by a number of the receivers.