Digital TV receiver

The digital TV receiver of claim 5, wherein the symbol clock recovery comprises:

• an OQAM converter converting each of the digital base-band real/imaginary signals interpolated and outputted from the resampler into OQAM real/imaginary component signals;
• a high pass filter performing a high pass-band filtering on the OQAM real/imaginary component signals outputted from the OQAM converter for removing information of data section;
• a squarer squaring each of the OQAM real/imaginary component signals filtered by and outputted from the high pass-band filter, and adding and outputting the calculation;
• a pre-filter passing only a frequency of a predetermined band from the output of the squarer for recovering the symbol clock;
• a timing error detector detecting timing error information from the output of the pre-filter;
• a filtering member filtering only a low pass-band signal from the timing error information outputted from the timing error detector;
• and
• an NCO generating at least two times the frequency of the symbol clock interpolated according to low pass-band components of the filtered timing error information and outputting to the first resampler.

A digital TV receiver, comprising:

• an A/D converter converting an analog signal into a digital signal;
• a carrier recovery converting the digital pass-band signal into a digital base-band signal;
• a resampler resampling digital base-band real/imaginary component signals outputted from the carrier recovery to at least two times the frequency of the symbol clock and interpolating each of the signals;
• an OQAM converter converting each of the digital base-band real/imaginary signals interpolated and outputted from the resampler into OQAM real/imaginary component signals;
• a high pass filter performing a high pass-band filtering on the OQAM real/imaginary component signals outputted from the OQAM converter for removing information of data section;
• a squarer squaring each of the OQAM real/imaginary component signals filtered by and outputted from the high pass-band filter, and adding and outputting the calculation;
• a pre-filter passing only a frequency of a predetermined band from the output of the squarer for recovering the symbol clock;
• a timing error detector detecting timing error information from the output of the pre-filter;
• a filtering member filtering only a low pass-band signal from the timing error information outputted from the timing error detector;
• and
• an NCO generating at least two times the frequency of the symbol clock interpolated according to low pass-band components of the filtered timing error information and outputting to the first resampler.

A digital TV receiver, comprising:

• an A/D converter converting an analog signal into a digital signal;
• a carrier recovery converting the digital pass-band signal into a digital base-band signal;
• a resampler resampling digital base-band real/imaginary component signals outputted from the carrier recovery to at least two times the frequency of the symbol clock and interpolating each of the signals;
• an OQAM converter converting each of the digital base-band real/imaginary signals interpolated and outputted from the resampler into OQAM real/imaginary component signals;
• a high pass filter performing a high pass-band filtering on the OQAM real/imaginary component signals outputted from the OQAM converter for removing information of data section;
• a first squaring operator squaring each of the OQAM real/imaginary component signals filtered by and outputted from the high pass filter, and calculating difference of the two squared signals and squaring the calculation;
• a second squaring operator squaring each of the OQAM real/imaginary component signals filtered by and outputted from the high pass filter, and calculating and squaring a difference of the two squared signals;
• an adder adding the output of the first and second squaring operators;
• a pre-filter passing only a frequency of a predetermined band for recovering the symbol clock from the output of the adder;
• a timing error detector detecting timing error information from the output of the pre-filter;
• a filtering member filtering only the low pass-band signal from the timing error information outputted from the timing error detector;
• and
• an NCO for generating at least two times the frequency of the symbol clock recovered according to low pass-band signals of the filtered timing error information and outputting to the first resampler.