A wireless media distribution system is provided comprising an access point (6) for broadcasting media and a plurality of stations (2) for reception and playback of media. Each station is configured for receiving and decoding a timestamp in a beacon frame transmitted repeatedly from the access point. This is used to control the output signal of a station physical layer clock (12) which is then used as a clock source for an application layer time synchronisation protocol. This application layer time synchronisation protocol can then be used in the station to control an operating system clock (8) for regulating playback of media.

An apparatus and method for broadcast signal frame using a bootstrap and a preamble are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a time interleaver configured to generate a time-interleaved signal by performing interleaving on a BICM output signal; and a frame builder configured to generate a broadcast signal frame including a bootstrap and a preamble using the time-interleaved signal.

An apparatus and method for broadcast signal frame using a bootstrap and a preamble are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a time interleaver configured to generate a time-interleaved signal by performing interleaving on a BICM output signal; and a frame builder configured to generate a broadcast signal frame including a bootstrap and a preamble using the time-interleaved signal.

The application provides a data extraction method for transmission signal, the data extraction method for transmission signal includes: upon receiving a transmission signal, parsing a first clock signal corresponding to the transmission signal to obtain a signal frequency; generating a second clock signal of same frequency according to the signal frequency; and extracting a data of the transmission signal according to the second clock signal. The present application aims to solve the problem of inaccurate data extraction of the transmission signal and improve the accuracy of data extraction of the transmission signal. The present application also provides a data extraction device for transmission signal and a computer readable storage medium.

An apparatus include a baseband processor configured to receive digital samples of a first wireless local area network (WLAN) signal demodulated with a first phase locked loop (PLL). The baseband processor is configured to determine whether to switch from using the first PLL to demodulate the first WLAN signal to a second PLL to demodulate the first WLAN signal. The apparatus further includes a selection circuit coupled to the first PLL and the second PLL. The selection switch is configured to switch from the first PLL to the second PLL based on the determination. The baseband processor is configured to receive additional digital samples of the first WLAN signal demodulated with the second PLL.

A method includes, at a first node: transmitting a first synchronization signal at a first time according to a first clock of the first node; back-coupling the first synchronization signal to generate a first self-receive signal; calculating a time-of-arrival of the first self-receive signal according to the first clock; and calculating a time-of-arrival of the second synchronization signal according to the first clock. The method also includes, at the second node: transmitting the second synchronization signal at a second time according to a second clock of the second node; back-coupling the second synchronization signal to generate a second self-receive signal; calculating a time-of-arrival of the second self-receive signal according to the second clock; and calculating a time-of-arrival of the first synchronization signal according to the second clock. The method S100 further includes calculating a time bias and a propagation delay between the pair of nodes based on the time-of-arrivals.

A method includes, at a first node: transmitting a first synchronization signal at a first time according to a first clock of the first node; back-coupling the first synchronization signal to generate a first self-receive signal; calculating a time-of-arrival of the first self-receive signal according to the first clock; and calculating a time-of-arrival of the second synchronization signal according to the first clock. The method also includes, at the second node: transmitting the second synchronization signal at a second time according to a second clock of the second node; back-coupling the second synchronization signal to generate a second self-receive signal; calculating a time-of-arrival of the second self-receive signal according to the second clock; and calculating a time-of-arrival of the first synchronization signal according to the second clock. The method S100 further includes calculating a time bias and a propagation delay between the pair of nodes based on the time-of-arrivals.

A printed circuit board includes a plurality of layers including conductive layers separated by dielectric layers, the conductive layers including a signal layer; and via patterns formed in the plurality of layers, each of the via patterns comprising first and second signal vias extending from a first surface of the printed circuit board to the signal layer, the signal layer including first and second signal traces connected to the first and second signal vias, respectively, the signal layer further including a ground conductor located between the signal traces and adjacent signal-carrying elements.

The present application discloses a data transmission method, a data transmission device, and a computer readable storage medium. The data transmission method includes: determining a logic level of the data signal according to detection potential of each sampling point in the data signal, and regenerating the data signal according to the logic level and a preset amplitude.

The present application discloses a data transmission method, a data transmission device, and a computer readable storage medium. The data transmission method includes: determining a logic level of the data signal according to detection potential of each sampling point in the data signal, and regenerating the data signal according to the logic level and a preset amplitude.