Abstract: A wireless communication apparatus includes a phase detecting unit configured to detect a signal change point at which a signal decoded from a received wireless signal changes and detect a temporal position of the signal change point within one cycle defined by setting of a symbol rate as a phase, a vector generating unit configured to generate a vector which corresponds to the detected phase and which has a predetermined magnitude, a vector synthesizing unit configured to synthesize the generated vector in plurality to generate a synthesized vector, a calculating unit configured to calculate a parameter having a correspondence relationship with a magnitude of the generated synthesized vector, and a judging unit configured to judge whether or not a wireless signal is a specific wireless signal based on the calculated parameter.

Abstract: A receiving antenna system includes: a receiving antenna including: an antenna element configured to receive a radio signal transmitted from a medical device introduced into a subject; and a base material on which the antenna element is mounted, the base material including a first base material, and a second base material; and a holder attached to the subject and configured to house the receiving antenna, wherein the antenna element is mounted on the first base material or the second base material, one of the first base material and the second base material has higher effective permittivity than effective permittivity of another one of the first base material and the second base material, and the first base material, the antenna element and the second base material are arranged in this order from a subject side.

Abstract: A wireless communication apparatus includes a phase detecting unit configured to detect a signal change point at which a signal decoded from a received wireless signal changes and detect a temporal position of the signal change point within one cycle defined by setting of a symbol rate as a phase, a vector generating unit configured to generate a vector which corresponds to the detected phase and which has a predetermined magnitude, a vector synthesizing unit configured to synthesize the generated vector in plurality to generate a synthesized vector, a calculating unit configured to calculate a parameter having a correspondence relationship with a magnitude of the generated synthesized vector, and a judging unit configured to judge whether or not a wireless signal is a specific wireless signal based on the calculated parameter.

Abstract: A receiving device includes: a receiving antenna configured to receive a wireless signal; a terminal circuit provided to the receiving antenna; a cable configured to transmit the wireless signal, one end of the cable being connected to the receiving antenna or the terminal circuit; a switch configured to switch between a first connection state where the one end of the cable is connected to the receiving antenna and a second connection state where the one end is connected to the terminal circuit; a measuring circuit configured to measures a first received strength of the wireless signal received by the receiving antenna and the cable in the first connection state and a second received strength of the wireless signal received by the cable in the second connection state; and a calculator configured to calculate, based on the first and second received strengths, a third received strength of the wireless signal.

Abstract: A receiving antenna includes: an antenna element configured to receive a first radio signal for detecting a position of a capsule endoscope introduced into a subject and a second radio signal for transmitting an image captured by the capsule endoscope; a first ground connected to the antenna element; a plate on which the antenna element and the first ground are arranged; a first differential processing circuit configured to generate a differential signal based on the first and the second radio signals; a cable including one end connected to the first differential processing circuit to transmit the differential signal; a second ground provided along the cable; and a switch configured to open a path between the first ground and the second ground at a time of receiving the first radio signal, and short-circuit the path at a time of receiving the second radio signal.

Abstract: A receiving antenna includes: an antenna element configured to receive a first radio signal for detecting a position of a capsule endoscope introduced into a subject and a second radio signal for transmitting an image captured by the capsule endoscope; a first ground connected to the antenna element; a plate on which the antenna element and the first ground are arranged; a first differential processing circuit configured to generate a differential signal based on the first and the second radio signals; a cable including one end connected to the first differential processing circuit to transmit the differential signal; a second ground provided along the cable; and a switch configured to open a path between the first ground and the second ground at a time of receiving the first radio signal, and short-circuit the path at a time of receiving the second radio signal.

Abstract: A receiving apparatus includes: a plurality of receiving antennas capable of receiving transmission data which is wirelessly transmitted frame by frame and includes a preamble at a head; a switching unit that selectively switches a connection to any one of the plurality of receiving antennas; a preamble detector that detects the preamble of the transmission data output via the receiving antenna which is connected by the switching unit; and a control unit that controls whether or not to cause the preamble detector to be in a sleep condition based on a detection result by the preamble detector.

Abstract: A capsule endoscope apparatus that is configured to be introduced into a subject to acquire information on an inside of the subject and to wirelessly communicate with a receiving apparatus provided outside the capsule endoscope apparatus. The capsule endoscope apparatus includes: an imaging unit configured to capture images of the subject and generate image data of the inside of the subject; a transmission unit configured to transmit a wireless signal including the image data, outside the capsule endoscope apparatus; a receiving unit configured to receive a control signal for instructing an operation of the capsule endoscope apparatus, the control signal having been transmitted from the receiving apparatus; and a capsule controller configured to activate the receiving unit in synchronization with a transmission timing when the transmission unit transmits the wireless signal.

Abstract: A receiving apparatus includes: a plurality of receiving antennas capable of receiving transmission data which is wirelessly transmitted frame by frame and includes a preamble at a head; a switching unit that selectively switches a connection to any one of the plurality of receiving antennas; a preamble detector that detects the preamble of the transmission data output via the receiving antenna which is connected by the switching unit; and a control unit that controls whether or not to cause the preamble detector to be in a sleep condition based on a detection result by the preamble detector.

Abstract: A transmitting and receiving apparatus that is connected with each of plural connection targets, which include an antenna unit and a charger, to perform transmission/reception of signals. The transmitting and receiving apparatus includes a connection portion that is provided on a surface of a reception main body unit of the transmitting and receiving apparatus, connectable with the antenna unit and another connection target, and is connected, at one time, with only one connection target to prevent a malfunction.