Abstract:
A wireless communication unit comprising a transmitter and a signal processor are provided. The signal processor is arranged to map service data onto a first set of multiple Physical Layer Pipes (PLPs), map the first set of PLPs onto a first set of logical frames, and form a first logical channel comprising the first set of logical frames. A structure of the logical frames is composed of PLPs of a plurality of different data types.
Abstract:
An apparatus and method for transmitting and receiving data in a wireless communication is provided. The method includes determining a number of zero-padding bits, determining a number (N pad ) of bit groups in which all bits are padded with zeros, padding the all bits within 0 th to (N pad -1) th bit groups indicated by a shortening pattern with zeros, mapping information bits to bit positions which are not padded in Bose Chaudhuri Hocquenghem (BCH) information bits, BCH encoding the BCH information bits to generate Low Density Parity Check (LDPC) information bits, and LDPC encoding the LDPC information bits to generate a zero-padded codeword, wherein the shortening pattern is defined as an order of bit groups defined as 6, 5, 4, 9, 3, 2, 1, 8, 0, 7, 10 and 11.
Abstract:
Methods and apparatus for transmitting data having a data stream in a wireless broadcast system are provided. The data stream is mapped onto a super-frame having frames. Each frame includes a preamble section and a data section. The data section carries the data stream, and the preamble section carries signalling information. The data section of each frame is segmented into frequency zones. At least part of the data stream is mapped to a first frequency zone. A signalling information word is generated that carries signalling relating to a position and a bandwidth of at least the first frequency zone. The signalling information word is included in the preamble section of a given frame. The preamble section is transmitted within a first frequency bandwidth and the first frequency zone is transmitted within a second frequency bandwidth. The first frequency bandwidth is greater than the second frequency bandwidth.
Abstract:
A method and apparatus for transmitting a plurality of data streams in a wireless broadcast system are provided. The method includes mapping the plurality of data streams onto a super-frame that includes a plurality of frames; inserting signalling information in a first signalling information field for assisting in the reception of a first number of said plurality of data streams for a given frame, the first number being less than or equal to a limit applicable to each of the plurality of frames; dependent on a number of data streams for the given frame being greater than the limit, inserting signalling information in a second signalling information field; inserting said first and second signalling information fields in a preamble section of said given frame; and transmitting the plurality of frames.
Abstract:
Methods and apparatus are provided for transmitting and receiving data streams. The data streams are received. The data streams are mapped to a physical slot. At least one frame that includes the physical slot is formed. The at least one frame is transmitted through at least one radio frequency. The at least one frame is received through at least one radio frequency. A location of the physical slot included in each frame is obtained. The data streams allocated to the physical slot in the location are received. The physical slot includes bit information indicating a number of antennas transmitting the at least one frame.
Abstract:
A method of transmitting data including one or more frames, including a preamble section and a data section is provided. The method includes modulating a signal with a first data sequence of the preamble section to generate a first modulated sequence using a first non-coherent modulation scheme; modulating a second data sequence of the preamble section to generate a second modulated sequence using a second modulation scheme capable of non-coherent detection that provides continuous variation of the second modulated sequence across a length of the first modulated sequence; superimposing the second modulated sequence upon the first modulated sequence to produce a superimposed sequence; and transmitting the superimposed sequence.
Abstract:
Methods and apparatus are provided for transmitting and receiving a data stream in a broadcast system. In accordance with a first aspect of the present invention, a method of transmitting data comprising a data stream in a broadcast system, the method comprising the steps of: segmenting the data stream into the plurality of segments of the data stream; generating a frame, the frame comprises a preamble section and a data section, the data section carries the data stream, and the preamble section carries signalling information; and transmitting the frame to the receiver.
Abstract:
Provided are a data structure including a header area, and a payload area comprising data, a method of generating the data structure, and extracting information from the data structure. At least one of the header area and the payload area includes at least one sub-area in which one or more signal fields are included. At least one signal field among the signal fields includes information for signalling presence or absence of one or more information fields located at least partly in the data structure, the one or more information fields corresponding to the one or more signal fields.
Abstract:
A method of transmitting data in a wireless communication system is provided. The method comprises mapping service data onto a first set of multiple Physical Layer Pipes (PLPs), mapping the first set of multiple PLPsonto a first set of logical frames, wherein each of the first set of logical frames is of the same size,forming a first logical channel comprising the first set of logical frames,and transmitting the mapped service data over a target delivery system.
Abstract:
A method for mapping of one or more logical channels onto a radio frequency channel in a communication system is provided. The method includes determining a logical channel type from a plurality of logical channel types, and mapping at least one logical frame of the determined logical channel type to at least one physical frame on at least one Radio Frequency (RF) channel based on the determined logical channel type.