Method and a device for determining an estimated value for a noise power

A device for determining an estimated value for a mean power of a noise signal sequence, which is superposed on an undisturbed periodic transmitted-signal sequence, with

• a unit for determining a mean power of a received-signal sequence;
• a downstream estimator for estimating an estimated-signal sequence for the undisturbed periodic transmitted-signal sequence, wherein:
• the estimated-signal sequence for the undisturbed periodic transmitted-signal sequence is formed from summated sampled values of the received-signal sequence, and
• each summated sampled value of the received-signal sequence is obtained in each case from a sum of sampled values of the received-signal sequence in several periods associated respectively with a polyphase of the period of the undisturbed periodic transmitted-signal sequence;
• and
• a downstream unit for determining a mean power of the estimated-signal sequence for the undisturbed periodic transmitted-signal sequence and a unit for determining the estimated value of the mean power of the noise-signal sequence which follows the unit for determining a mean power of the received-signal sequence and the unit for determining a mean power of the estimated-signal sequence for the undisturbed periodic transmitted-signal sequence.

A data carrier with a computer program with program-code means for the implementation of the following steps when the program is executed on a computer or a digital signal processor:

• determination of a mean power of a received-signal sequence which corresponds to the undisturbed periodic transmitted-signal sequence with the addition of the superposed noise-signal sequence;
• estimation of an estimated-signal sequence for the undisturbed periodic transmitted-signal sequence from the received-signal sequence, wherein:
• the estimated-signal sequence for the undisturbed periodic transmitted-signal sequence is formed from summated sampled values of the received-signal sequence, and
• each summated sampled value of the received-signal sequence is obtained in each case from a sum of sampled values of the received-signal sequence in several periods associated respectively with a polyphase of the period of the undisturbed periodic transmitted-signal sequence;
• determination of a mean power of the estimated-signal sequence for the undisturbed periodic transmitted-signal sequence;
• and
• determination of the estimated value of the mean power of the noise-signal sequence from a difference between the determined mean power of the received-signal sequence and the determined mean power of the estimated-signal sequence.