PSLR, ISLR, and running time curves depending upon filter length. The curves relating to SNR = ∞ are described by black solid line; and the curves relating to SNR = 20 dB are described by color short dash line. The curves of PSLR are denoted by symbol of hollow circle; the curves of ISRL are denoted by symbol of hollow triangle; and the curves of running time are denoted by symbol of hollow square. (A) Curves of correlation outputs. (B) Curves of matched filtering outputs.