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Code channel activation detection method for same-frequency multiple cells of TD-SCDMA system and device thereof

A technology of TD-SCDMA and code channel activation, which is applied in the field of code channel activation detection of multiple cells of the same frequency in the TD-SCDMA system, and can solve the problem of inaccurate non-preferred code channel selection, affecting joint detection performance, and code channel activation detection results Inaccurate and other issues

Active Publication Date: 2015-07-15
大唐联诚信息系统技术有限公司
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Problems solved by technology

But even if it is the preferred code channel, it may become weaker due to fading or interference, etc., then such a preferred code channel should not be retained at this time, then use the preferred code channel that should not be retained as the choice of non-preferred code channel reservation The reference factors of whether or not will also lead to inaccurate selection of non-preferred code channels, and ultimately inaccurate code channel activation detection results
[0005] Therefore, the result of the code activation detection of the existing code activation detection method is inaccurate, which will affect the performance of the subsequent joint detection

Method used

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  • Code channel activation detection method for same-frequency multiple cells of TD-SCDMA system and device thereof
  • Code channel activation detection method for same-frequency multiple cells of TD-SCDMA system and device thereof
  • Code channel activation detection method for same-frequency multiple cells of TD-SCDMA system and device thereof

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specific Embodiment 1

[0097] see figure 1 Shown, realize that the specific embodiment one of the method of the present invention comprises the following steps:

[0098] Step 101: All bursts in a time slot received are divided into midamble sequence parts and data parts; by figure 2 The frame structure of the TD-SCDMA system shown, where B, Tfr, Tbu, K respectively represent a frequency slot band, a TD-SCDMA frame duration, a burst duration, in the same frequency and time slot User number. A burst in TD-SCDMA consists of two data blocks with a length of 352chips, a midamble code with a length of 144chips and a guard interval with a length of 16chips (1chip=781ns).

[0099] Step 102: select all the cells that have obtained the configuration message and the cells that have not obtained the configuration message that meet the specified conditions in each intra-frequency cell corresponding to the midamble sequence part as reserved cells;

[0100] Since the code channel configuration information of t...

Embodiment 1

[0127] In order to support Embodiment 1 of the method of the present invention, the present invention also proposes a device for realizing the method, such as Image 6 As shown, realizing the first embodiment of the device of the present invention includes:

[0128] A comparison sequence generating unit 601, configured to generate in advance a comparison sequence whose cross-correlation values ​​with all channelization codes are lower than a threshold value one;

[0129] A data segmentation unit 602, configured to segment the received burst into a training sequence part and a data part;

[0130] The selected reserved cell unit 603 is used to select all the cells that have obtained the configuration message and the cells that have not obtained the configuration message that meet the specified conditions in each intra-frequency cell corresponding to the training sequence part as the reserved cell;

[0131] The processing unit 604 is configured to obtain all activation windows o...

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Abstract

The present invention discloses a code channel activation detection method for same-frequency multiple cells of a TD-SCDMA system, which comprises the following steps: dividing received outburst to a training sequence part and a data part; selecting all cells of which configuration information is acquired and cells that satisfy a preset condition and have configuration information that is not acquired in each same-frequency cell that corresponds with the training sequence part as reserving cells; acquiring all activated windows of each reserving cell; acquiring a descrambling data sequence of each reserving cell by means of the data part, and calculating the power of a comparing sequence, which corresponds with each reserving cell; and supposing all code channels in all activated windows of each reserving cell exist, calculating a ratio between the power of each code channel and the power of the comparing sequence, which corresponds with the cell with the code channel, and detecting whether a radio is larger than a threshold value, and if yes, determining the code channel to be the activated code channel. The invention further discloses a code channel activation detection method for the same-frequency multiple cells of the TD-SCDMA system.

Description

technical field [0001] The invention relates to the technical field of mobile communication system detection, in particular to a code channel activation detection method and device for multiple cells of the same frequency in a TD-SCDMA system. Background technique [0002] For the TD-SCDMA system, in multiple cells in the same frequency band, with the increase of the number of users communicating at the same time, multiple access interference is the most important interference. Joint detection can effectively eliminate multiple access interference, suppress the near-far effect, and greatly improve system capacity and performance. In multi-cells with the same frequency, each channel estimation window may correspond to multiple code channels, so code channel activation detection is required on the basis of window activation detection, that is, to detect which code channels are occupied, and use the configuration information of the occupied code channels with For subsequent jo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7105H04L25/02
Inventor 刘继超廉小丽马涛温小军曹晏波乔元新
Owner 大唐联诚信息系统技术有限公司
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