US 2010/0150181 A1 · APPARTUS FOR RECEIVING T-DMB SIGNAL AND METHOD OF OPERATING THE SAME

Abstract

There is provided an apparatus for receiving a T-DMB signal. The apparatus for receiving a T-DMB signal comprises an input buffer receiving and buffering a T-DMB signal comprising a null symbol and a phase reference symbol (PRS); an initial synchronizing unit estimating and compensating for time and frequency offsets of the T-DMB signal using the null symbol and the PRS; a frame tracking unit performing estimation of the time offset and measurement of a strength of an output signal from the input buffer; an OFDM signal demodulating unit performing I/Q demodulation, frequency compensation, OFDM demodulation and de-interleaving with respect to an output signal of the frame tracking unit; a channel decoding unit performing channel decoding with respect to an output signal of the OFDM signal demodulating unit and checking quality of the channel-decoded signal; and a controller controlling operations of the initial synchronizing unit, the OFDM signal demodulating unit and the channel decoding unit 308 based on the strength of the signal measured by the frame tracking unit and the quality of the signal checked by the channel decoding unit. Accordingly, unnecessary calculating processes arc reduced by measuring the strength and quality of an input signal, thereby maximizing power efficiency of the apparatus.

Claims6

Dependent claims

An apparatus for receiving a T-DMB signal, comprising:

an input buffer receiving and buffering a T-DMB signal comprising a null symbol and a phase reference symbol (PRS);
an initial synchronizing unit estimating and compensating for time and frequency offsets of the T-DMB signal using the null symbol and the PRS;
a frame tracking unit performing estimation of the time offset and measurement of the strength of an output signal from the input buffer;
an OFDM signal demodulating unit performing I/Q demodulation, frequency compensation, OFDM demodulation and de-interleaving with respect to an output signal of the frame tracking unit;
a channel decoding unit performing channel decoding with respect to an output signal of the OFDM signal demodulating unit and determining quality of the channel-decoded signal;
and
a controller controlling operations of each of the initial synchronizing unit, the OFDM signal demodulating unit and the channel decoding unit based on the strength of the signal measured by the frame tracking unit and the quality of the signal determined by the channel decoding unit.

4 more elements

Dependencies are inferred from the claim text.

Appartus for receiving t-dmb signal and method of operating the same

Life of this patent

Appartus for receiving t-dmb signal and method of operating the same

Life of this patent

Abstract

Claims6