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Method and device for suppressing frequency offset false alarm in random access channel

A random access channel and false alarm technology, applied in wireless communication, electrical components, etc., can solve problems affecting multi-user detection performance and unsatisfactory results, to suppress frequency offset false alarms, avoid missed detection, and suppress false peaks Effect

Active Publication Date: 2014-08-13
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual detection system, due to the multipath with different delays, the frequency offset false peak may not appear exactly at ±du, so the effect of this scheme to suppress the frequency deviation false peak is not ideal, and it will also affect the multi-user simultaneous Access detection performance

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  • Method and device for suppressing frequency offset false alarm in random access channel
  • Method and device for suppressing frequency offset false alarm in random access channel
  • Method and device for suppressing frequency offset false alarm in random access channel

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Embodiment Construction

[0072] The present invention proposes a method and device for suppressing frequency offset false alarms in a random access channel. The peak offset window is obtained according to the peak set and the cyclic shift set, and all peaks and corresponding cyclic shifts falling in the peak offset window are Clearing by shifting can effectively suppress false peaks caused by frequency offset and suppress false alarms of frequency offset; in addition, the present invention sets the first threshold to control the range of false peak removal, and the first threshold can be flexible according to the range of frequency offset Adjustment can ensure the effective control of frequency offset false alarms to the greatest extent, and also avoid missed detection of simultaneous access of multiple users.

[0073] refer to figure 1 , the present invention proposes a method for suppressing frequency offset false alarms in a random access channel according to the first embodiment, comprising steps:...

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Abstract

The invention discloses a method and a device for suppressing frequency offset false alarm in a random access channel in the field of mobile communication. The method comprises the following steps of: carrying out peak value detection on a time domain correlation signal of the random access channel to acquire a peak value set and a cyclic shift set; acquiring a peak offset window according to the maximum peak value in the peak value set and a cyclic shift corresponding to the maximum peak value in the cyclic shift set; and removing the peak values dropped into the peak offset window and the cyclic shifts corresponding to the peak values from the respective set. By the method, a false peak caused by frequency offset can be effectively suppressed, so the frequency offset false alarm is suppressed.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method and device for suppressing frequency offset false alarms in a random access channel. Background technique [0002] In the LTE (Long Term Evolution, Long Term Evolution) system, random access technology is an important technology for access control of user equipment (User Equipment) in the communication system. UE completes uplink timing synchronization correction through the random access process, and user power Adjustment and application of user resource requirements. [0003] In the actual system, after the UE is turned on, it first performs downlink synchronization through SCH (Synchronization Channel, synchronization channel), finds the receiving start point and cell ID (CellID) of wireless frames and subframes; Information, including RACH (Random Access Channel, random access channel) configuration information; finally, uplink synchronization is performed throug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08
Inventor 李磊秦洪峰
Owner ZTE CORP