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Method and device for judging interfering boundary
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A boundary and judgment point technology, applied in the field of judgment of interference data boundaries
Active Publication Date: 2015-05-27
LEADCORE TECH
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[0008] In view of this, the present invention provides a method and device for judging the interference boundary to solve the deficiencies in the existing interference boundary judgment technology
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Embodiment 1
[0041] 1. Choose a differential filter. Specifically, you can choose a one-dimensional difference filter (such as a one-dimensional Gaussian filter), the length of the processed data (that is, the length of the input data) is L, and the filter coefficient is [-1, -1, -1, ..., - 1, 1, 1, 1, ..., 1].
[0042] Then, modify the filter coefficients of the differential filter. The modification process includes: dividing the input data into two parts; finding the N data with the smallest amplitude from the two parts of the input data respectively, and calculating the filter coefficients at the corresponding positions Set to 0, and the filter coefficients in other positions remain unchanged, where the value range of N should be a positive integer less than half the length of the input data, that is, less than half the length L of the data processed by the differential filter. Specifically, for the received data of length L that is input to the filter each time, the data is divided in...
Embodiment 2
[0066] Please refer to Figure 4 , which is a schematicflowchart of a method for judging an interference boundary given in Embodiment 2 of the present invention. As shown in the figure, the method includes the following steps:
[0067] Step S410: performing differential filtering on the input data to obtain an uncorrected filtering result;
[0068] Step S420: Correcting the filter coefficient;
[0069] Step S430: performing a corrected differential filter on the input data to obtain a corrected filter result;
[0070] Step S441: Search for the corrected filtering results, and select a plurality of candidate points, the amplitude of the candidate points is greater than the amplitude of at least one adjacent point on both sides of the candidate point;
[0071] Step S442: selecting an initial boundary from the candidate points;
[0072] Step S450: Take the initial boundary as the center, search the original filtering results on both sides, and determine the interference boun...
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Abstract
The invention discloses a method and a device for judging an interfering boundary. The method includes differencing and filtering input data to obtain an uncorrected filtering result; correcting filtering coefficients; differencing and filtering the input data after correction to obtain a corrected filtering result; searching for the corrected filtering result and determining an initial boundary; and searching original filtering results on two sides of the initial boundary used as a center and determining the interfering boundary. The method and the device have the advantages that the correlation between an interfering tap and a data tap is taken into consideration, and data corresponding to an offset part of interfering signals and received signals are additionally processed; and owing to two-time searching, influence of the offset data to false detection is reduced, and the accuracy of outputted marginal values is improved.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and device for judging the boundary of interference data with accurate judgment and small error. Background technique [0002] In modern wireless communication systems, frequency multiplexing technology is often used to improve spectrum utilization, which inevitably introduces co-channel interference. When the carrier-to-interference ratio C / I of co-channel interference is less than a certain value, it will directly affect the quality of voice calls, and even cause a series of problems such as a decrease in data transmission rate and call drop. [0003] Co-channel interference is divided into synchronous interference and asynchronous interference. The interference source of synchronous interference and the training sequence (TS) of the transmitted signal completely coincide in time; while the interference source of asynchronous interference only partially...
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