The automatic gain controller and the method that uses the efficient receiving structure of the impulse radio ultra-wide band wireless communication systems

摘要

The present invention relates to an automatic gain control apparatus and method using an efficient reception structure of an impulse signal based ultra-wideband wireless communication system. ; According to the present invention, an automatic gain control apparatus of an impulse signal based wireless communication system secures a signal-to-noise ratio received through an analog circuit unit, outputs a correlation value for an impulse preamble of the received signal, and every symbol among the correlation values. Each time the maximum value of the correlation value is output or the symbol interval is divided into a plurality of groups, the average value is obtained through the sum of the group units, and the maximum value thereof is output. The attenuation gain is determined by comparing the maximum correlation value according to the output result with at least one predetermined threshold, and the gain value of the low noise amplifier and the variable gain amplifier of the analog circuit unit are set or changed based on the determined attenuation gain result. do. ; Accordingly, according to the present invention, it is possible to expect an effect of maintaining an optimal signal to noise ratio in various distances and indoor wireless channel environments through an efficient reception structure and automatic voltage gain control method for digital signal processing. . ; WBAN, WPAN, Impulse, Ultra Wideband, UWB, AGC