CYCLE-SLIP DETECTION METHOD AND APPARATUS, AND RECEIVER

摘要

The present invention provides a cycle-slip detection method and apparatus, and a receiver. If an absolute value of a first difference obtained by subtracting a phase of a first symbol in a kth training sequence cycle from a phase of a last symbol in a (k−1)th training sequence cycle in a received signal is greater than a cycle-slip determining threshold, it is determined that a cycle-slip occurs in the kth or (k−1)th training sequence cycle. Further, if a second difference obtained 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 kth training sequence cycle is greater than the cycle-slip determining threshold, and signs of the first difference and the second difference are opposite, it is determined that a cycle-slip occurs in all symbols in the kth training cycle.

主权项

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 kth 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; and if yes, determining that a cycle-slip occurs in the kth 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 kth 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; if yes, determining that a cycle-slip occurs in all symbols in the kth training cycle; or if not, 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.