Abstract:
Provided are a coordinated multipoint transmission and reception method and a coordinated multipoint transmission and reception system for performing the same. In the operation method of a first base station in a network in which the first base station and a second base station transmit data to a terminal, the method includes receiving, by the first base station, a packet to be transmitted to the terminal and base station information indicating a base station determined to transmit the packet from a gateway of the network; and transmitting, by the first base station, the packet to the terminal according to the determined base station information.
Abstract:
In order to provide a three-dimensional (3D) video streaming service to a user terminal, user characteristic information including eyesight information of the left eye and the right eye of a user is received from the user terminal. Then, one of quality of a left image and that of a right image is improved in accordance with the eyesight information so that an image with improved quality is transmitted to the user terminal.
Abstract:
A method of transmitting a terrestrial cloud transmission signal using a low density parity check (LDPC)-Reed Solomon (RS) two-dimensional code and a method and apparatus for adaptively decoding the LDPC-RS two-dimensional code are disclosed here. The method of transmitting a terrestrial cloud transmission signal includes encoding information to be transmitted into a two-dimensional code including an LDPC code and an RS code, and outputting encoded information, which is encoded into the two-dimensional code, row by row.
Abstract:
A transmission apparatus couples a first phase modulation signal for first input data and a second phase modulation signal for second input data according to a first coupling method and transmits the coupled signal, and a reception apparatus receives the coupled signal. The reception apparatus derives a signal in which a first phase modulation signal and a second phase modulation signal are coupled according to a second coupling method from a received signal and separates the first phase modulation signal and the second phase modulation signal from the received signal based on the received signal and the derived signal. Furthermore, the reception apparatus obtains the first input data by demodulating the first phase modulation signal and obtains the second input data by demodulating the second phase modulation signal.
Abstract:
A data transmitting apparatus generates a plurality of modulation data symbols by performing symbol mapping of input data, converts and angle-modulates the plurality of modulation data symbols from a frequency domain to a real number signal of a time domain, and circular-shifts and transmits the angle-modulated signal from a signal of a frequency domain.
Abstract:
Disclosed is a method of transmitting, by a transmission device, broadcast signals in a frequency-shared terrestrial broadcast system. The method includes generating the broadcast signals including pilot signals arranged at a physical layer frame based on a group identification (ID) defined according to a broadcast service, and transmitting the generated broadcast signals to a reception device, wherein the positions of the pilot signals arranged at the physical layer frame are different by group IDs.