Detection method and apparatus

Abstract

The invention discloses a detection method, comprising: calculating the ratio of the power average value of the ranging subcarrier to the power average value of the guard band subcarrier; comparing the ratio with a predetermined threshold value, and if the , then record the detected ranging code. Correspondingly, an embodiment of the present invention provides a detection device, including: a calculation unit, configured to calculate the ratio of the average power value of the ranging subcarrier to the average power value of the guard band subcarrier; a comparison unit, configured to compare the ratio with the The predetermined threshold value is compared; the first processing unit is used to record the detection of the ranging code when the comparison result of the comparison unit is that the ratio is less than or equal to the threshold value. The technical solutions provided by the embodiments of the present invention can better eliminate false alarms, and at the same time reduce the impact on user terminal access.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a detection method and a detection device. Background technique [0002] Uplink random access technology is a key technology in the field of wireless communication. Through the uplink access process, the synchronization of uplink signals arriving at the base station from the user terminal side is achieved. After receiving the broadcast message from the base station, the user terminal selects an uplink access code according to a certain algorithm in the allocated contention channel area and sends it to the base station. The base station uses code detection technology to measure the time delay and frequency offset between the user terminal and the base station. And power and other parameters, and these parameters are fed back to the user terminal through the downlink channel for adjustment. [0003] In the code detection process, there will be false alarms and missing alar...

AI Technical Summary

Problems solved by technology

[0022] During the research and practice of the prior art, the inventor found the following problems in the prior art: if the code detection threshold Detect_Hold is simply increased, the probability of missing alarms will increase, which will affect the access of user terminals

When the transmit power of the user terminal is small, the probability of missed alarm will be greater, and when the transmit power of the user terminal is slightly higher, according to the simulation results, there will be a certain amount of missed alarm

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