摘要:
The present invention relates to a transmitter, a repeater; a transmitting method, and a repeating method. A transmitter according to an exemplary embodiment of the present invention includes, a first signal generator that generates conventional signals according to a first wireless communication scheme; a second signal generator that generates additional signals used in a second wireless communication scheme different from the first wireless communication scheme; a coupler that couples the additional signals to the convention signals; and a transmitting unit that transmits the coupled signals in a transmission band of the first wireless communication scheme.
摘要:
Provided is a method for providing emergency broadcasting for providing emergency service signal. A method for providing emergency broadcasting includes encoding the emergency service signals at a predetermined bit rate; optionally padding null stream in the encoded emergency service signals and generating a first emergency message signal having a first main service bit rate of a first broadcasting channel that is the bit rate or more; and optionally padding the null stream in the encoded emergency service signals and generating a second emergency message signal having a second main service bit rate of a second broadcasting channel different from the first main service bit rate that is the bit rate or more.
摘要:
An apparatus and a method for synchronizing symbols in an OFDM receiver are disclosed. The apparatus includes a signal magnitude calculator; a first delay unit; a first subtractor, for obtaining the difference between the signal delayed by the first delay unit and the input complex signal; an absolute value calculator; a second delay unit; a second subtractor, for obtaining the difference between the signals respectively received from the second delay unit and the absolute value calculator; a moving window sum unit; a searching unit; and a guard interval removing unit.
摘要:
Disclosed is an apparatus and method for adding transmitter identification information. The transmitter identification information adding apparatus enables a wireless relay station within a DAB(Digital Audio Broadcasting) series transmission system to add, in a signal received from a transmitting station, separate transmitter identification information, so that a receiving station may identify whether the received signal is a signal transmitted from the wireless relay station, or a signal transmitted from the transmitting station, based on identification information.
摘要:
Provided are a method and apparatus for transmitting service contents. The method for transmitting service contents by switching connection between at least two contents providing units and a transmitter, comprising: connecting the transmitter connected to any one contents providing unit to another contents providing unit when switching signals are generated.; and transmitting service contents transmitted from another contents providing unit.
摘要:
An emergency broadcasting apparatus comprises a co-channel repeater that removes multi-path signals or a Doppler effect from received broadcasting signals; and an emergency broadcasting unit performing at least one of decoding, multiplexing, and modulating input audio, video, and data emergency broadcasting signals according to a broadcasting standard.
摘要:
Disclosed is an apparatus for broadcasting emergency information, the apparatus including: an emergency information generator which analyzes service setup information related to general broadcasting information and generates emergency information based on a setup environment consistent with the service setup information; a broadcasting information processor which receives the general broadcasting information, transmits the service setup information to the emergency information generator, periodically monitors whether the service setup information is changed, changes a channel for the emergency information on the basis of monitoring results, and generates and modulates a first ensemble transmission interface (ETI) frame including the emergency information and the same channel as a fast information channel transporting control information about the general broadcasting information; a broadcasting information switching unit which selects and outputs one of the first ETI frame and a second ETI frame including the general broadcasting information; and a radio frequency (RF) transmitter which transmits the selected ETI frame through a RF.
摘要:
An emergency broadcasting apparatus comprises a co-channel repeater that removes multi-path signals or a Doppler effect from received broadcasting signals; and an emergency broadcasting unit performing at least one of decoding, multiplexing, and modulating input audio, video, and data emergency broadcasting signals according to a broadcasting standard.
摘要:
Provided is a method for providing emergency broadcasting for providing emergency service signal. A method for providing emergency broadcasting includes encoding the emergency service signals at a predetermined bit rate; optionally padding null stream in the encoded emergency service signals and generating a first emergency message signal having a first main service bit rate of a first broadcasting channel that is the bit rate or more; and optionally padding the null stream in the encoded emergency service signals and generating a second emergency message signal having a second main service bit rate of a second broadcasting channel different from the first main service bit rate that is the bit rate or more.
摘要:
An apparatus for synchronizing a symbol in an OFDM receiver and a method thereof are disclosed. The apparatus includes a signal magnitude calculator for calculating a magnitude of an applied input complex signal; a first delay unit for delaying a signal received from the signal magnitude calculator during T u ; a first adding unit for gaining a difference value for the magnitude between the signal delayed by the first delay unit and the input complex signal; an absolute value calculator for gaining an absolute value of the signal received from the first adding unit; a second delay unit for delaying the signal received from the absolute value calculator during a minimum T g ; a second adding unit for obtaining a difference value of the signals respectively received from the second delay unit and the absolute value calculator; a moving window sum unit for calculating sum of the signals received from the second adding unit during the minimum T g ; a searching unit for comparing values of the accumulating unit during T u and a maximum T g , and searching for a predetermined point; and a guard interval removing unit for removing the guard interval by using the searched position.