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Method and device for estimating frequency deviation compensation

A technology of frequency offset and frequency, applied in the direction of multi-frequency code system, etc., can solve the problems of long estimation cycle, FO frequency deviation, etc.

Inactive Publication Date: 2014-10-22
ST ERICSSON SA
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Problems solved by technology

However, due to the large frequency deviation of the initial FO (precompensation value) sent by the fine synchronization (SYNC) module, a longer estimation period is required

Method used

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  • Method and device for estimating frequency deviation compensation
  • Method and device for estimating frequency deviation compensation
  • Method and device for estimating frequency deviation compensation

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Embodiment Construction

[0080] 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 the drawings and specific embodiments.

[0081] Such as Figure 4 As shown, an embodiment of the present invention provides a method for frequency offset compensation estimation, including:

[0082] Step 51, obtaining the maximum correlation value among the K correlation processing results of the received signal; wherein, the K is a positive integer;

[0083] Step 52, according to the position in the subframe corresponding to the correlation processing result corresponding to the maximum correlation value, respectively obtain the correlation result of the same subframe position in the K correlation processing results;

[0084] Step 53, merging the obtained K correlation results to form a correlation result sequence;

[0085] Step 54, interpolating the correlation result sequence to obtain the...

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Abstract

The invention provides a method and device for estimating frequency deviation compensation. The method comprises: acquiring a maximum correlative value in K correlation processing results of a received signal; acquiring correlative results of same sub frame positions in the K correlation processing results according to the position, in a corresponding sub frame, of the correlation processing result corresponding to the maximum correlative value; merging the acquired K correlative results in order to form a correlation result sequence; performing interpolation on the correlation result sequence to acquire a maximum value point in a correlation function curve; and acquiring a frequency deviation compensation estimating result according to the maximum value point in the correlation function curve. The scheme of the invention may shorten cell search time.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for frequency offset compensation. Background technique [0002] Such as figure 1 As shown, one frame of TD-SCDMA has a duration of 10 ms and can be divided into two subframes each having a duration of 5 ms. In a frame length of 10ms, each subframe has the same structure. The total number of business time slots of uplink and downlink is 7, and the length of each business time slot is 864chips. Among the 7 slots, slot #0 indicates that it is allocated to downlink, and slot #1 indicates that it is allocated to uplink. The time slots for uplink and downlink are separated by switching points. Between the uplink time slot and the downlink time slot, the uplink and downlink are separated by a switching point. [0003] Special time slot, the content of DwPTS (downlink pilot time slot) is composed of 64chips SYNC-DL sequence with a duration of 96chips; the conte...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 唐治汛李超张丽萍
Owner ST ERICSSON SA
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