To provide an apparatus for calculation of correlation that can take a correlation even when a frequency error is relatively large. With a 0-th degree correlator for taking, to output, a correlation between a reference signal and a measurement signal, an n-th degree correlator including an ejwt multiplier...http://www.google.com.tw/patents/US7058143?utm_source=gb-gplus-share專利 US7058143 - Apparatus and a method for calculation of a correlation value corresponding to a frequency error, and a recording medium with a recorded correlation value calculation program
