Frequency-point detection method, device and user equipment

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

Active Publication Date: 2012-08-29
SANECHIPS TECH CO LTD
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Problems solved by technology

[0004] The invention discloses a frequency point detection method, device and u

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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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[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 the 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) for 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 scanned spectrum of the frequency band issued by the MAC layer ,Such as figure 2 As shown, the figure shows the aggregation of the power results of 3 spectrum scans, and the results of the power of 6 spectrum scans can be aggregated at most.

[0050] Every time 18MHZ spectrum scan is performed, 2048-point FFT is performed on 30.72MHZ data to obtain 1200 sub-carrier IQ data, and then RSSI calculat...

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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...

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Application Information

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IPC IPC(8): H04W24/08H04W48/16
Inventor 孙伟
Owner SANECHIPS TECH CO LTD
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