Broadcast signal transmission apparatus using transmission identifier scaled with 4-bit injection level code and method using same
An apparatus for transmitting broadcasting signal using transmitter identification scaled by 4-bit injection level code and method using the same are disclosed. An apparatus for transmitting broadcasting signal according to an embodiment of the present invention includes a waveform generator configured to generate a host broadcasting signal; a transmitter identification signal generator configured to generate a transmitter identification signal for identifying a transmitter, the transmitter identification signal scaled by an injection level code; and a combiner configured to inject the transmitter identification signal into the host broadcasting signal in a time domain so that the transmitter identification signal is transmitted synchronously with the host broadcasting signal.
1. A method of transmitting broadcasting signal, comprising:
generating a transmitter identification signal for identifying a transmitter, the transmitter identification signal scaled corresponding to an injection level code; and
injecting the transmitter identification signal into a host broadcasting signal in a time domain so that the transmitter identification signal is transmitted synchronously with the host broadcasting signal,
wherein the transmitter identification signal corresponds to a transmitter identification sequence having a length of 8191 bits, and
wherein the transmitter identification signal is transmitted within a first preamble symbol period including a guard interval after a bootstrap of the host broadcasting signal.
2. The method of claim 1 , wherein the injection level code consists of 4 bits and is assigned for injection level values set with 3 dB intervals when the transmitter identification signal is emitted.
3. The method of claim 2 , wherein the injection level values cover a range from 9.0 dB to 45.0 dB and include a value corresponding to a case that the transmitter identification signal is not emitted.
4. The method of claim 3 , wherein the injection level code is assigned to “0000” for the case that the transmitter identification signal is not emitted.
5. The method of claim 1 , wherein a first signal corresponding to a first bit of the transmitter identification signal is emitted simultaneously with a first sample of a first preamble symbol including the guard interval, and a second signal corresponding to a second bit of the transmitter identification signal is emitted simultaneously with a second sample of the first preamble symbol including the guard interval.
6. The method of claim 5 , wherein the transmitter identification sequence
is emitted once within the first preamble symbol period when the first preamble symbol corresponds to Fast Fourier Transform (FFT) having a size of 8192, and
is repeated twice within the first preamble symbol period when the first preamble symbol corresponds to FFT having a size of 16384, and
is repeated four times within the first preamble symbol period when the first preamble symbol corresponds to FFT having a size of 32768.
7. The method of claim 6 , wherein an even-numbered sequence has an opposite polarity to an odd-numbered sequence when the transmitter identification sequence is repeated.