摘要:
A method is provided for initiating broadcasting payload data, the method comprising: wirelessly transmitting a message from a broadcast device to a network device, the message containing configuration information of the broadcasting; receiving the message at the network device and extracting the configuration information at the network device; and configuring the network device for receiving at least a part of the broadcasted payload data based on the configuration information. Further, a broadcast device for broadcasting payload data and a network device for receiving broadcasted payload data are provided.
摘要:
A method of synchronising the reference clock of a first wireless device with a master reference clock of a second wireless device via a wireless network. The method involves transmitting, from the second wireless device to the first wireless device, a dedicated synchronisation frame via a dedicated synchronisation channel; receiving the dedicated synchronisation frame at the first wireless device; and synchronising the reference clock of the first wireless device with the master reference clock of the second wireless device based on the received dedicated synchronisation frame.
摘要:
A method of synchronising the reference clock of a first wireless device with a master reference clock of a second wireless device via a wireless network. The method involves transmitting, from the second wireless device to the first wireless device, a dedicated synchronisation frame via a dedicated synchronisation channel; receiving the dedicated synchronisation frame at the first wireless device; and synchronising the reference clock of the first wireless device with the master reference clock of the second wireless device based on the received dedicated synchronisation frame.
摘要:
A method is provided for initiating broadcasting payload data, the method comprising: wirelessly transmitting a message from a broadcast device to a network device, the message containing configuration information of the broadcasting; receiving the message at the network device and extracting the configuration information at the network device; and configuring the network device for receiving at least a part of the broadcasted payload data based on the configuration information. Further, a broadcast device for broadcasting payload data and a network device for receiving broadcasted payload data are provided.
摘要:
Various embodiments relate to a transmission circuit and related method of shaping the transmission spectrum of a carrier signal. The transmission circuit may comprise a plurality of switching amplifier stages that are controlled by a modulation sequence produced by a transmission (TX) modulator. The TX modulator may receive the transmission data as a sequence of bit groups and may produce a modulation sequence including a plurality of control bits that may drive each of the switching amplifier stages. In some embodiments, one or more pulse-shaping filters may modify in-phase (I) and quadrature (Q) phase components of the transmission data. The modified components may directly shape spectral content of the output signal produced by a transmission driving circuit. Higher quantities of amplifier stages included in the transmission driving circuit may add higher granularity to the shape of the spectrum of the output signal.
摘要:
A near-field communications system comprises first and second antenna coils disposed such that, in combination, they generate a magnetic field with orthogonal components, wherein the system is configured to generate first and second signals for the first and second antenna coils respectively, the first and second signals being out of phase.
摘要:
It is provided an apparatus for transferring energy to an accumulator, the apparatus having a core and a wire wound around the core thereby forming a coil, wherein the coil is adapted to receive energy from a magnetic field, wherein the wire is connectable to the accumulator to transfer the received energy to the accumulator. A charging station for generating a magnetic field for transferring energy to an accumulator is provided, and a system for charging an electric accumulator is provided, wherein the system includes an apparatus as described above; and a charging station having a further wire wound such as to form a further coil.
摘要:
It is described an open-loop transmit coil diversity scheme, intended for communication based on magnetic induction, wherein the diversity scheme automatically aligns the transmit coil (110) of a transmitter (100) with the receive coil of a receiver without relying on feedback information from the receiver to the transmitter (100). This may be achieved by having a plurality of coils (110, 120, 130) in the transmitter (100) and/or in the receiver. Each of these coils (110, 120, 130) may be oriented orthogonally with respect to the other coil(s). The optimal coil (130) may be selected by measuring the position angle of the transmitter (100) and/or the receiver by making use of at least one inclinometer (132). For radio communication on the transmitter and/or on the receiver this coil (130) is selected, whose orientation is maximally parallel with the orientation of the corresponding coil on the other side of the radio communication link. Alternatively, if there is only one coil in the transmitter and/or the receiver, it may be possible to spatially adjust the orientation of the transmit coil and/or the receive coil by employing at least one mechanical actuator.