A INTERFERENCE POWER DETECTION METHOD IN TIME-SLOT CDMA SYSTEM

摘要

The present invention relates to a interference power detection method in time-slot CDMA system, the method is proposed by some applications in time-slot CDMA system, particularly in a downlink receiving device. Comprising: Doing a channel estimation to input received signal using Midamble Code to obtain a primary channel response estimation result hi; Giving tap number threshold W1, extracting the estimation result of W1 taps' channel response having lower power as a estimation result of interference power, from the primary channel response estimation result hi according to W1; Using the interference power estimation result and a given signal-noise ratio threshold, doing a threshold processing to the primary channel response estimation result by means of signal-noise ratio threshold postprocessing method ; Before the threshold processing , compensating the error possibly generated by the interference power estimation , and doing a threshold processing using compensated power threshold to obtain a precision detection result. The method may provide a reliable detection to interference power in time-slot CDMA system without idle channel estimation windows information.