Patent Document ID: 9521022
Application ID: 14995855
Patent Flag: 1

Claim One:
1. A cycle-slip detection method, comprising: for a received signal on which phase estimation processing has been performed, calculating a first difference by subtracting a phase of a first symbol in a k th training sequence cycle from a phase of a last symbol in a (k−1) th training sequence cycle in the received signal, and determining whether an absolute value of the first difference is greater than a set cycle-slip determining threshold, wherein the received signal comprises several training sequence cycles, and k is an integer greater than or equal to 2; in response to the absolute value of the first difference being greater than the set cycle-slip determining threshold: determining that a cycle-slip occurs in the k th or (k−1) th training sequence cycle; calculating a second difference by subtracting a phase of the first symbol in the (k+1) th training sequence cycle from a phase of the last symbol in the k th training sequence cycle; and determining whether an absolute value of the second difference is greater than the set cycle-slip determining threshold, and whether plus and minus signs of the first difference and the second difference are opposite; in response to the absolute value of the second difference being greater than the set cycle-slip determining threshold, and in response to the plus and minus signs of the first difference and the second difference being opposite: determining that a cycle-slip occurs in all symbols in the k th training cycle; and in response to the absolute value of the second difference not being greater than the set cycle-slip determining threshold, or in response to the plus and minus signs of the first difference and the second difference not being opposite: determining that a cycle-slip occurs in a data symbol in the (k−1) th training sequence cycle, and locating a position of the cycle-slip.