Activated code channel detection method and device

摘要

The present invention provides an activated code channel detection method. The method includes: performing de-scrambling and de-spreading on a received signal according to a node corresponding to a current spreading factor, obtaining symbol energy corresponding to each node; acquiring a first decision parameter and a second decision parameter according to symbol energy of two adjacent nodes of a same parent node and a pre-acquired noise threshold, where the first decision parameter is a comparison result of comparing the noise threshold with symbol energy of each of the two adjacent nodes, and the second decision parameter is a comparison result of comparing the symbol energy of the two adjacent nodes; detecting modulation modes of code channels corresponding to the two adjacent nodes, obtaining a modulation mode detection result; and executing activated code channel detection according to the first decision parameter, the second decision parameter, and the modulation mode detection result.

主权项

1. An activated code channel detection method, comprising:
performing de-scrambling and de-spreading on a received signal according to nodes corresponding to a current spreading factor in a spreading code tree, and obtaining symbol energy corresponding to each of the nodes after de-scrambling and de-spreading; acquiring a first decision parameter and a second decision parameter according to the obtained symbol energy of two adjacent nodes in the nodes corresponding to a current spreading factor and belonging to a same parent node and a pre-obtained noise threshold, wherein the first decision parameter is a comparison result of comparing the noise threshold with the obtained symbol energy of each of the two adjacent nodes, and the second decision parameter is a comparison result of comparing the obtained symbol energy of the two adjacent nodes, wherein the parent node is one of nodes corresponding to an upper-level spreading factor in the spreading code tree; determining whether modulation modes of code channels corresponding to the two adjacent nodes are detected or not detected to obtain a modulation mode detection result, wherein the modulation mode detection result indicated that no modulation mode is detected for the two adjacent nodes, or the modulation mode of one of the two adjacent nodes is detected, or the modulation modes of both of the two adjacent nodes are detected; and executing activated code channel detection to the code channels corresponding to the two adjacent nodes according to the first decision parameter, the second decision parameter, and the modulation mode detection result, to determine whether each of the two code channels corresponding to two adjacent nodes is an activated code channel or not an activated code channel.