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Adjusting method of power spectrum estimation value and terminal

A technology of power spectrum estimation and adjustment method, which is applied to the adjustment method and terminal field of power spectrum estimation value, can solve the problem of difficulty in completely eliminating the DC component of the power spectrum, and achieves the effect of shortening the time for searching the network and improving the ranking.

Active Publication Date: 2018-10-09
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0012] The purpose of the present invention is to provide a method and terminal for adjusting the estimated value of the power spectrum to solve the problem that it is difficult to completely eliminate the DC component in the power spectrum in the prior art

Method used

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  • Adjusting method of power spectrum estimation value and terminal
  • Adjusting method of power spectrum estimation value and terminal
  • Adjusting method of power spectrum estimation value and terminal

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Embodiment Construction

[0050] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to specific embodiments and accompanying drawings.

[0051] In some embodiments of the invention, referring to figure 1 As shown, a method for adjusting the estimated value of the power spectrum is provided, including:

[0052] Step 101: Detect whether the wideband signal received at the target frequency contains a narrowband signal.

[0053] Here, by detecting whether the wideband signal received at the target frequency contains a narrowband signal, it is identified whether the power spectrum contains a DC component, so as to facilitate subsequent elimination of the DC component in the power spectrum.

[0054] Step 102: If a narrowband signal is included, adjust the estimated power spectrum value of the second group of frequency points according to the estimated value of the average power spectr...

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Abstract

The invention provides the adjusting method of a power spectrum estimation value and a terminal. In the prior art, a direct current component in a power spectrum is difficult to completely eliminate.In the invention, the above problem is solved. The method comprises the following step of if a narrowband signal is included, adjusting the power spectrum estimation value of the second group of frequency points according to the average power spectrum estimation value of the first group of frequency points, wherein a frequency interval between each frequency point in the second group of frequencypoints and a target frequency point is greater than or equal to a first preset threshold and is less than or equal to a second preset threshold, the frequency interval between each frequency point inthe first group of frequency points and the target frequency point is greater than the second preset threshold, and the second group of frequency points includes a plurality of preset frequency pointswhich are adjacent to each other. In the invention, a power spectrum which does not contain the narrowband signal can be acquired, a purpose of eliminating the direct current component in the power spectrum is realized, the ranking of the effective frequency points in a power window ratio sequence can be increased and terminal full frequency band sounet time can be shortened.

Description

technical field [0001] The present invention relates to the technical field of communication applications, in particular to a method for adjusting an estimated value of a power spectrum and a terminal. Background technique [0002] The 3rd Generation Partnership Project (3GPP) agreement stipulates that the carrier spacing of Wideband Code Division Multiple Access (WCDMA) signals is 5MHz, and the center frequency of the carrier may exist in any 200KHz integer times the frequency. Taking the 2110-2170MHz frequency band as an example, the center frequency points of WCDMA may exist in 2112.4MHz, 2112.6MHz, 2112.8MHz, ..., 2167.4MHz, 2167.6MHz, a total of 277 frequency points. When the terminal performs a full-band cell search, it will take a lot of time if it tries to camp on all frequency points sequentially. [0003] In general, the frequency points with high power (that is, the center frequency point where the terminal can successfully camp in the cell) are always more like...

Claims

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Application Information

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IPC IPC(8): H04W24/02H04W24/08H04W48/16H04W88/02H04L25/03
CPCH04L25/03H04W24/02H04W24/08H04W48/16H04W88/02Y02D30/70
Inventor 李丹妮
Owner DATANG MOBILE COMM EQUIP CO LTD
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