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Method and device for detecting physical random access channel (PRACH) of multi-antenna base station

A multi-antenna and antenna technology, applied in the communication field, can solve the problems of missed detection, large PRACH processing capacity, and long processing time, and achieve the effects of optimizing the processing flow, reducing processing timeout, and reducing processing time and processing capacity

Active Publication Date: 2015-04-15
DATANG MOBILE COMM EQUIP CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0020] Embodiments of the present invention provide a PRACH detection method and device for a multi-antenna base station, which is used to solve the problems in the prior art that the base station using multiple antennas has too much processing capacity for PRACH detection, too long processing time, and processing timeout. Missed detection problem

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  • Method and device for detecting physical random access channel (PRACH) of multi-antenna base station
  • Method and device for detecting physical random access channel (PRACH) of multi-antenna base station
  • Method and device for detecting physical random access channel (PRACH) of multi-antenna base station

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Embodiment Construction

[0038] According to the provisions of the current LTE protocol scheme, the more antennas the base station configures, the greater the number of ZC root sequences required for each cell, which will increase the processing capacity of the base station, which will easily cause PRACH processing timeout and affect the user terminal. random access.

[0039] In order to avoid missed detection of PRACH random access, the embodiment of the present invention improves the processing flow of PRACH detection. When selecting an antenna with better PRACH signal quality, the PRACH frequency domain after FFT transformation in the PRACH receiver can be used Data for signal selection, because the PRACH signal with good signal-to-noise ratio is composed of Zadoff-Chu sequence, which has good constant amplitude and zero autocorrelation characteristics, and also has many characteristics, the most obvious of which is the PRACH data after FFT transformation The constant-amplitude characteristic in th...

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Abstract

The invention discloses a method and a device for detecting a physical random access channel (PRACH) of a multi-antenna base station. The method comprises that the amplitude variance of the corresponding PRACH frequency domain data of each antenna is respectively obtained, and the corresponding antennas of the PRAC frequency domain data which has the amplitude variance being smaller than a variance threshold value are selected; an automatic gain control (AGC) factor of the corresponding PRACH frequency domain data of each selected antenna is determined; and the PRACH detection is carried out on the PRACH frequency domain data with the AGC factor being greater than the set threshold value. The method and a device are used for solving the problem of leak detection which is caused by over large processing quantity, overlong processing time and overtime processing of the PRACH detection of the base station which adopts a plurality of antennas in the prior art.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a PRACH detection method and device for a multi-antenna base station. Background technique [0002] In the LTE (Long Term Evolution, long-term evolution) system, the random access process is a very critical link. This process is to establish a communication link between UE (User Equipment, user terminal) and eNB (evolved Node B, evolved base station) premise. Regardless of whether the user terminal UE initially accesses a cell after powering on, or performs cell handover during communication, it needs to rely on a random access procedure to establish contact with the base station eNB. Therefore, LTE PRACH (Physical Random Access Channel, physical random access channel) plays a key role in the transmission scheme of asynchronous UE and LTE uplink wireless access. Generally, the user terminal sends a random access signal, and the PRACH receiver is used to initiat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/02H04B7/04
Inventor 邵青郭晴
Owner DATANG MOBILE COMM EQUIP CO LTD
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