| 摘要 |
A method is described for detecting erasures in a stream of sets of digital signal values received at a receiver side after transmission from a transmission side. Subsets of these sets are modulated on distinct carrier signals, each transmitted and received thus modulated carrier signal corresponding to one of a number of predetermined subset related points and to a receipt point on a carrier dependent modulation representing map respectively. The method includes the steps of: selecting for each receipt point the nearest of the predetermined subset related points; calculating a distance between the receipt point and the nearest subset related point and multiplying this distance with a map dependent weight factor; summing the thus obtained weighted distances for all subsets of a set; and marking the latter set as an erasure when the thus obtained result exceeds a predetermined threshold.
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