Signal detection method and device and base station of random access signal channel

Abstract

The invention discloses a signal detection method and a device and a base station of a random access signal channel. The signal detection method includes that power delay spectrum of a random access channel (RACH) time-domain signal is conducted, an attenuation template is obtained, positions of peak value of points of the attenuation template correspond to positions of peak value of a copy of the RACH time-domain signal, the attenuation template is used to conduct attenuation for the power delay spectrum, the peak value of the copy of the power delay spectrum is removed, non-copy power delay spectrum is obtained, the non-copy power delay spectrum is used to conduct signal detection of the random access signal channel to be connected in to a user, the attenuation template is used to conduct attenuation for the power delay spectrum, a copy peak generated a virtual peak due to frequency deviation is precisely removed, in the process of conducting connecting and judging, a false alarm rate is reduced, when copy peaks generated by a access peak of other user, and an access peak of the user is overlaid, the access judging of the access peak of the other user can not be affected, and the whole access success rate of a terminal is improved.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a signal detection method, device and base station of a random access channel. Background technique [0002] In the long-term evolution (LTE, Long Term Evolution) system, after the user terminal (UE, User Equipment) is turned on, it first performs downlink synchronization through the synchronization channel (SCH, Synchronization Channel), and finds the receiving start point and cell number of the radio frame and subframe; Then obtain system information through a broadcast channel (BCH, Broadcast Channel), which includes configuration information of a random access channel (RACH, Random Access Channel); finally perform uplink synchronization through the RACH, and complete the work of accessing the system. [0003] The third generation partnership project (3GPP, 3 rd The Generation Partnership Project) protocol regulates the generation and transmission of RACH. LTE a...

AI Technical Summary

Problems solved by technology

[0022] Embodiments of the present invention provide a random access channel signal detection method, device, and base station, which are used to accurately eliminate the duplicate peaks generated by the frequency offset of the real peak, and reduce the false alarm rate when making access judgments. At the same time, it solves the problem that in the existing random access channel signal detection method, the peak value of multi-user access is set as a non-detection point by mistake, resulting in missed detection and degrading system access performance.

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