The present technology relates to a signal processing apparatus, signal processing method, and program capable of extending a communication distance while reducing a signal delay in contactless communication. The signal processing apparatus performs filter processing on a signal received from a reader/writer via a first antenna, and transmits the signal to a card serving as a contactless communication apparatus via a second antenna. Furthermore, the signal processing apparatus performs filter processing on a signal received from the card via the second antenna, and transmits the signal to the reader/writer via the first antenna. The present technology can be applied to a communication system using contactless communication.

An electronic device and a communication system are provided. The electronic device includes a ring-shaped functional conductor and a near field communication (NFC) antenna radiator. A hollowed-out region is surrounded by the functional conductor. The NFC antenna radiator is configured to transmit and receive a NFC signal at least toward a side where the functional conductor is located. An orthographic projection of the NFC antenna radiator on a plane where the functional conductor is located, is at least partially located within the hollowed-out region. The NFC antenna radiator is configured to be electrically connected to a radio frequency (RF) signal source and to generate a first electromagnetic field and a second electromagnetic field in opposite directions in the hollowed-out region under an excitation of the RF signal source, for enabling the functional conductor to generate a first induced current and a second induced current in opposite directions.

Disclosed are systems and techniques for wireless communications. For example, a computing device can receive an energizing signal from a second device, the energizing signal comprising a wakeup signal including a preamble portion and a data portion, wherein the preamble portion indicates timing of the data portion and the data portion indicates one or more channels for transmission by the first device. The computing device can receive energy from the energizing signal. The computing device can transmit, to the second device based on an amount of the energy received, a response signal using one channel of the one or more channels for transmission.

A telematics service system includes a transmitter provided in or on an attachment mountable to and demountable from a working vehicle to transmit a wireless signal, a first communicator to receive the wireless signal transmitted from the transmitter, a second communicator to transmit attachment information including attachment identification information about the attachment, a server to receive the attachment information to manage telematics information, and a controller to acquire the identification information from the wireless signal received by the first communicator, and cause the second communicator to transmit the attachment information to the server. The controller causes the second communicator to transmit, to the server, different attachment information in response to whether the attachment is in a mounted or demounted state, and determines whether the attachment is in the mounted or demounted state based on the different attachment identification information included in the attachment information received from the second communicator.

A telematics service system includes a transmitter provided in or on an attachment mountable to and demountable from a working vehicle to transmit a wireless signal, a first communicator to receive the wireless signal transmitted from the transmitter, a second communicator to transmit attachment information including attachment identification information about the attachment, a server to receive the attachment information to manage telematics information, and a controller to acquire the identification information from the wireless signal received by the first communicator, and cause the second communicator to transmit the attachment information to the server. The controller causes the second communicator to transmit, to the server, different attachment information in response to whether the attachment is in a mounted or demounted state, and determines whether the attachment is in the mounted or demounted state based on the different attachment identification information included in the attachment information received from the second communicator.

The present disclosure relates to a method for transmitting data packet information, wherein the method is performed by a wireless power transmitter in a wireless power transmission system, and comprises the steps of: entering a power transfer phase; receiving a plurality of control error (CE) packets from a wireless power receiver during the power transfer phase; determining the intervals between the plurality of CE packets; and transmitting the data packet information to the wireless power receiver during the power transfer phase on the basis of the intervals, wherein the length of the data packet information is determined on the basis of the length of the intervals.

An antenna impedance matching design circuit includes a load circuit, a filter circuit and a matching circuit which are connected to each other. The load circuit is connected to one end of the filter circuit for connecting a near field communication chip, and the matching circuit includes a plurality of capacitors.

An antenna impedance matching design circuit includes a load circuit, a filter circuit and a matching circuit which are connected to each other. The load circuit is connected to one end of the filter circuit for connecting a near field communication chip, and the matching circuit includes a plurality of capacitors.

One or more implementations described include near field communication (NFC)-based service execution applied to a user terminal device. By an operating system in an NFC way, a uniform resource locator (URL) provided by an NFC tag device is acquired, where the URL comprises protocol type information, domain name information, and a light application card parameter, where the protocol type information represents that the URL conforms to hypertext transfer protocol secure (HTTPS), and where the light application card parameter is used to be recognized by an iOS operating system in a light application card way. An application corresponding to the domain name information is started, where the application is used to execute a service process corresponding to the URL.

One or more implementations described include near field communication (NFC)-based service execution applied to a user terminal device. By an operating system in an NFC way, a uniform resource locator (URL) provided by an NFC tag device is acquired, where the URL comprises protocol type information, domain name information, and a light application card parameter, where the protocol type information represents that the URL conforms to hypertext transfer protocol secure (HTTPS), and where the light application card parameter is used to be recognized by an iOS operating system in a light application card way. An application corresponding to the domain name information is started, where the application is used to execute a service process corresponding to the URL.