| 摘要 |
A receiver, an arrangement and a method are proposed for comparing two signals, based on testing whether a first signal exhibits at least one property during a first time interval, and consecutively testing if a second signal exhibits at least one similar property during a second time interval, following the first time interval, said second being in the range of 200 mu s to 5 ms. In the present invention, the assumption is made that if a first signal exhibits a certain property during a first time interval, it is likely to exhibit substantially the same property during a second time interval, following the first interval. Thus, if a second signal exhibits such a property during the second time interval, the second signal is deemed to be the same as the first signal. If both tests are positive, the two signals are determined to be the same. In this way both signals need not be present simultaneously. By choosing the second interval in the range as given above, no extremely fast tuning system is needed, without said comparison becoming annoyingly audible. |
