Method of detecting synchronization timing and sub-band based on adaptive threshold and receiver performing the same

A receiver comprising:

• a template generator configured to generate a template signal based on an input signal and a reference signal, the input signal corresponding to a training sequence, the reference signal being a single predetermined reference signal;
• a first calculator configured to receive the input signal, and to perform a matched filtering operation on the input signal based on the template signal;
• and
• a second calculator configured to calculate an adaptive threshold for detecting a target sub-band among a plurality of sub-bands based on a result of the matched filtering operation, to calculate a peak tone for the target sub-band based on the result of the matched filtering operation, and to determine whether the input signal corresponds to the target sub-band and a synchronization timing for the input signal based on the adaptive threshold and the peak tone.

A method of detecting synchronization timing and sub-band, the method comprising:

• receiving an input signal corresponding to a training sequence;
• generating a template signal based on the input signal and a reference signal, the reference signal being a single reference signal;
• performing a matched filtering operation on the input signal based on the template signal;
• setting a valid range based on a result of the matched filtering operation;
• calculating an adaptive threshold for detecting a target sub-band based on the result of the matched filtering operation and the valid range;
• calculating a peak tone for the target sub-band based on the result of the matched filtering operation and the valid range;
• and
• determining whether the input signal corresponds to the target sub-band and a synchronization timing for the input signal based on the adaptive threshold and the peak tone,
• wherein calculating the adaptive threshold includes:
• measuring noise power by performing a windowing operation around a target position of the input signal;
• and
• obtaining the adaptive threshold based on the noise power, and
• wherein generating the template signal includes:
• calling a pre-stored look-up table (LUT) corresponding to the reference signal, the look-up table being a single look-up table;
• obtaining a frequency bandwidth of the input signal;
• obtaining a sub-band index of the input signal;
• and
• obtaining the template signal based on the look-up table, the frequency bandwidth and the sub-band index.