Transmission of signaling data in frequency division multiplexed broadcasting systems
A signaling data, multiplexing technology, applied in multi-frequency code system, transmission system, digital transmission system and other directions, can solve the problem of mobile service capacity limitation and so on
Active Publication Date: 2021-07-16
SONY CORP
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Problems solved by technology
[0004] However, in ISDB-T, the current standard for broadcasting networks using OFDM for time division multiplexing (TDM) service in a single channel, there is a problem that the capacity of mobile services is limited once a tuner is set. limit
Method used
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Embodiment Construction
[0031] Embodiments of the present disclosure may be arranged to form a transmission network for transmitting signals representing data including video data and audio data, such that the transmission network may for example form a broadcast network for transmitting television signals to television receiving devices. In some examples, a device for receiving audio / video of a television signal may be a mobile device that receives the television signal while on the move. In other examples, audio / video data may be received by a conventional television receiver, which may be stationary and may be connected to one or more stationary antennas.
[0032] A television receiver may or may not include an integrated display of the television image, and may be a recorder device including multiple tuners and demodulators. The antenna may be built into the television receiver device. An attached or built-in antenna is available to facilitate reception of different signals as well as television...
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A transmitter is configured to transmit payload data using Orthogonal Frequency Division Multiplexing OFDM symbols. The transmitter includes a frame builder configured to receive payload data to be transmitted from each of a plurality of different channels, and form the payload data for each channel for each of the plurality of time frames into a plurality of payload data frames for transmission; a modulator configured to generate, for each of the plurality of payload data frames, a frame synchronization OFDM symbol, one or more primary signaling OFDM symbols, one or more a secondary signaling OFDM symbol, and modulating one or more payload OFDM symbols with payload data from each channel; and a transmission unit for transmitting each payload data frame as a plurality of transmission frames, each A transmission frame consists of one or more payload OFDM symbols preceded by a frame sync OFDM symbol, followed by one or more primary signaling OFDM symbols, followed by one or more secondary signaling OFDM symbols, followed by one or more Payload OFDM symbols. transmit frame-synchronous OFDM symbols and one or more primary signaling OFDM symbols in a bandwidth equal to the radio frequency transmission bandwidth, and transmit one or more secondary signaling OFDM symbols and one or more payload OFDM symbols in the radio frequency transmission bandwidth , each of one or more secondary signaling OFDM symbols and one or more payload OFDM symbols are divided in frequency to provide multiple frequency segments, each frequency segment carrying payload data from a different channel, each One or more secondary signaling OFDM symbols in frequency segments carry one instance of multiple instances of physical layer signaling for detection and recovery from each of the payload OFDM symbols transmitted in the set of frequency segments payload data of channels, and one or more primary signaling OFDM symbols carry primary signaling data for detecting secondary signaling OFDM symbols.
Description
technical field [0001] The present disclosure relates to transmitters and methods for transmitting payload data using Orthogonal Frequency Division Multiplexing (OFDM) symbols. This disclosure claims Paris Convention priority from UK 1611071.0, the contents of which are hereby incorporated by reference. Background technique [0002] There are many examples of wireless communication systems in which data is communicated using Orthogonal Frequency Division Multiplexing (OFDM). Television systems that have been set up to operate according to the Digital Video Broadcasting (DVB) standard for example use OFDM for terrestrial and cable transmission. OFDM can generally be described as providing K narrowband subcarriers (where K is an integer) that are modulated in parallel, each subcarrier conveying a modulated data symbol, e.g., a quadrature amplitude modulation (QAM) symbol or a quadrature phase shift keying (QAM) symbol. QPSK) symbols. The modulation of the subcarriers is for...
Claims
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IPC IPC(8): H04L27/26
CPCH04L27/2626H04L27/26136H04L27/2613
Inventor 塞谬尔·阿桑本·阿通西里
Owner SONY CORP