SNR ESTIMATION METHOD, SNR ESTIMATION DEVICE, COMPUTER PROGRAM AND STORAGE MEDIUM

摘要

The SNR estimation method used for a communication system in which the modulation is performed on the basis of a constellation diagram, comprises: calculating a first estimated SNR by using an original symbol sequence; when the first estimated SNR is less than a first SNR estimation threshold, deleting a number of symbols from the original symbol sequence to obtain a modified symbol sequence, and calculating a second estimated SNR as a current SNR estimation result by using the modified symbol sequence; and when the first estimated SNR is greater than or equal to the first SNR estimation threshold, using the first estimated SNR as the current SNR estimation resu wherein, among the deleted symbols, a difference between distances from at least a part of the symbols to adjacent constellation points of the constellation diagram is less than a predetermined distance threshold. It is able to improve the accuracy of the SNR estimation.