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Detection method, device and base station for random access signal

A technology of random access signal and detection method, applied in wireless communication, advanced technology, electrical components, etc., can solve the problems of detection loss and system access performance degradation, so as to reduce the probability of missed detection, improve detection performance, and effectively compensate The effect of power loss

Active Publication Date: 2013-05-15
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology

[0010] Embodiments of the present invention provide a random access signal detection method, device, and base station, which are used to solve the problem of missed detection due to the detection loss of the effective power of the time-delayed power spectrum in the existing random access signal detection method. The problem of degraded access performance

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  • Detection method, device and base station for random access signal
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  • Detection method, device and base station for random access signal

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Embodiment Construction

[0027] The specific implementation manners of the random access signal detection method, device and base station provided by the embodiments of the present invention will be described below with reference to the drawings in the description.

[0028] A method for detecting a random access signal provided by an embodiment of the present invention, such as figure 1 As shown, it specifically includes the following steps:

[0029] S101. Process the physical random access channel PRACH time-domain signal sent by the terminal, and extract the corresponding frequency-domain ZC reception sequence;

[0030] S102. Obtain a corresponding power delay profile according to the extracted frequency domain ZC receiving sequence and the pre-generated frequency domain ZC local signature sequence;

[0031] S103. Perform windowing on the power delay spectrum;

[0032] S104. For each window, perform a noise floor removal operation on the power sum in the window to obtain the effective power sum of...

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Abstract

The invention provides a detection method, a device and a base station for a random access signal. A physical random access channel (PRACH) time-domain signal sent by a terminal is processed, and a corresponding frequency domain zone code (ZC) receiving sequence is extracted. A corresponding power time delay spectrum is obtained based on the extracted frequency domain ZC receiving sequence and a frequency domain ZC local signature sequence generated in advance. Windowing is performed on the generated power time delay spectrum, for each window, an effective power sum is obtained through internal power of the window and execution of base noise removing operation, and the effective power sum of the window is compared with a detection threshold so as to judge whether a user is accessed or not. According to the internal power in the window and the execution of the base noise removing operation, the effective power of the time delay spectrum is restored, effective power loss due to oversampling is compensated, undetected odds are reduced, and random access signal detection performance is improved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a random access signal detection method, device and base station. Background technique [0002] Long Term Evolution (LTE) is the evolution of 3G communication system, it develops and enhances 3G air access technology, adopts Orthogonal Frequency Division Multiplex (OFDM) and MIMO (Multiple -Input Multiple-Output, MIMO) as its main technology. [0003] The LTE system defines two modes of frequency division duplexing (Frequency Division Duplexing, FDD) and time division duplexing (Time Division Duplexing, TDD). As the bearer of the channel, the resources in one direction are discontinuous in time, and the time resources are allocated in two directions. Since TDD-LTE does not require paired frequencies, it can be conveniently configured in scattered frequency bands that are not easily used by FDD-LTE systems. It has certain spectrum flexibility and can effecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04W74/08
CPCY02B60/50Y02D30/70
Inventor 陈立俊邓单
Owner COMBA TELECOM SYST CHINA LTD
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