The embodiments of the present invention relate to the general area of wireless communication systems and, in particular, to fast and efficient measurement techniques for TD-SCDMA technology. The measurement subsystem is one of the main subsystems of a TD-SCDMA system and comprises measurement of several radio network quantities, each of which is required by a number of system procedures. The measurement of some quantities is computationally more complex than that of the others, such as the measurement of ISCP (Interference Signal Code Power) and IRT (Impulse Response Timing). The proposed method of this invention decreases the computation complexity of the ISCP measurement.