Method and apparatus for adaptively suppressing noise

The apparatus for improving the quality of a communication signal in a communications system, comprising: means for dividing the communication signal into a plurality of frequency band signals; means for generating a first power signal for the first frequency band signal, which is based on estimating over a first time period the power of the first frequency band signal; means for generating a second power signal to the first signal frequency band, which is based on estimating over a second period of less than the first time period the power of the first frequency band signal time; the means for generating a noise ratio-signal (NSR) representing a condition of the first signal frequency band in response to a predetermined arithmetic relationship comprising at least one addition, subtraction and multiplication but without division, between values ​​derived from the first and second power signal; means for adjusting the gain of the frequency band signal in response to the NSR to generate a frequency band signal adjusted; and means for combining the baseband signal frequency set with at least one additional signal frequency band signal to generate a preset communication.