Method for determining characteristics of signal and apparatus using the same

A computer readable medium encoded with processing instructions for causing a computer to execute a method of determining characteristics of a signal, the method comprising:

• sampling a RF signal using an analog-to-digital converter;
• obtaining binary data from the sampled RF signal;
• delaying the binary data using a plurality of delayers;
• generating selection signal using the binary data and the delayed binary data output from the each of the plurality of delayers;
• obtaining average value of the sampled RF signal according to the selection signal;
• and
• determining a characteristics value of the RF signal using the obtained average value of the sampled RF signal.

An apparatus for detecting binary data from a radio frequency (RF) signal, comprising:

• an analog-to-digital (ADC) converter that samples a radio frequency (-RF) signal by a specified period and outputs the sampled RF signal;
• a DC offset canceller that receives the sampled RF signal output from the ADC converter and cancels a DC offset value from the sampled RF signal;
• a PLL that generates a system clock signal and outputs the clock signal to the ADC and the DC offset canceller;
• a plurality of delayers receiving binary data and outputting delayed binary data;
• a selection signal generator receiving the binary data and the delayed binary data received from each of the plurality of delayers, and generating a selection signal;
• a channel identifier receiving the sampled RF signal, and outputting average value of the sampled RF signal according to the selection signal;
• and
• a signal characteristics determiner receiving the average value of the sampled RF signal and determining a characteristics value that indicates the characteristics of the RF signal using the received average value of the sampled RF signal, wherein the characteristics value indicates one of asymmetry, a modulation ratio, or a non-linearity of the RF signal;
• a viterbi decoder that obtains the binary data from the sampled RF signal using the average value of the sampled RF signal output from the channel identifier;
• and
• a FIR filter that adjust the channel characteristics of the signal input to the viterbi decoder.