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Frequency-point detection method, device and user equipment

A detection method and technology of user equipment, which are applied in the directions of access restriction, electrical components, wireless communication, etc., can solve the problems of low efficiency of RSSI scanning and detection, and achieve the effect of reducing the number of frequency points and improving the detection speed.

Active Publication Date: 2015-07-22
SANECHIPS TECH CO LTD
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  • Abstract
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Problems solved by technology

[0004] The invention discloses a frequency point detection method, device and user equipment to solve the problem of low efficiency of RSSI scanning detection

Method used

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  • Frequency-point detection method, device and user equipment
  • Frequency-point detection method, device and user equipment
  • Frequency-point detection method, device and user equipment

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Embodiment Construction

[0046] Such as figure 1 As shown, the frequency point detection method of the embodiment of the present invention includes:

[0047] Step 101: Perform spectrum scanning;

[0048] The user equipment (UE) receives a signal power spectrum according to a certain bandwidth, and the bandwidth can be from 1.4MHZ to 20MHZ.

[0049] During spectrum scanning, since the maximum effective bandwidth of LTE user equipment (UE) data processing is only 18MHz, when the bandwidth to be scanned is greater than 18M, it is necessary to aggregate the results of several spectrum scanning powers to obtain the scanning spectrum of the frequency band delivered by the MAC layer ,Such as figure 2 As shown, the illustration shows the aggregation of the results of 3 frequency spectrum scanning powers, and the results of 6 frequency spectrum scanning powers can be aggregated at most.

[0050] When performing 18MHZ spectrum scanning each time, perform 2048-point FFT operation on 30.72MHZ data to obtain I...

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Abstract

The invention relates to a frequency-point detection method, a device and user equipment. The method comprises the following steps of: carrying out frequency spectrum scan; dividing the frequency spectrum of a specified frequency band into a plurality of frequency spectrum envelopes, and determining the effectiveness of each frequency spectrum envelope; and carrying out autocorrelation detection of a primary synchronization signal (PSS) to the frequency point of each effective frequency spectrum envelope, and determining the effective frequency point. According to the frequency-point detection method, the device and the user equipment, the frequency-point detection efficiency is increased.

Description

technical field [0001] The present invention relates to the field of wireless communication, mobile communication terminals, and in particular to a frequency point detection method, device and user equipment based on a primary synchronization signal in an LTE system. Background technique [0002] In a mobile communication system, user equipment (UE) needs to scan its surrounding frequency points. Scanning means that the radio frequency device calculates the RSSI (Received Signal Strength Indicator) value within a given bandwidth for a given center frequency point. the process of. For UE terminals, frequency point detection is the first step in the UE physical layer after power-on. Its purpose is to find a suitable (signal) frequency point from the possible configuration frequency bands according to the configuration of the MAC layer, and report it. The MAC layer is used for further processing and scheduling, such as subsequent cell search and camping. Also, when the UE nee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/08H04W48/16
Inventor 孙伟
Owner SANECHIPS TECH CO LTD
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