Processing method and equipment for common-frequency channel estimation algorithm

A channel estimation and algorithm technology, which is applied in the field of co-frequency algorithm channel estimation processing, can solve the problem of considerable computational complexity, and achieve the effect of reducing the computational complexity of the algorithm.

Inactive Publication Date: 2011-09-21
CHINA ACAD OF TELECOMM TECH
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Problems solved by technology

Since each interference cancellation iteration needs to select the tap with the highest power among all taps of all selected cells, and completely eliminate the interference of this tap to all taps of all other selected cells, the deficiency of the prior art lies in that: when the number of cells When there are many or the number of iterations is large, the amount of calculation will be considerable

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  • Processing method and equipment for common-frequency channel estimation algorithm
  • Processing method and equipment for common-frequency channel estimation algorithm
  • Processing method and equipment for common-frequency channel estimation algorithm

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Embodiment Construction

[0047] The inventor noticed in the process of invention: because single-code-set channel estimation is the basis of multi-code-set channel estimation, and the existing single-code-set channel estimation algorithm has very little overhead, and interference calculation and interference cancellation are the direct ways to recover purer signals. Therefore, if the computation amount selected for the maximum power tap is simplified, the computation amount of multi-cell channel estimation can be effectively reduced.

[0048] In view of this, in the technical solution provided by the present invention, the channel estimation result of the single code set is optimized first to determine those tap positions with high probability and interference signals, and then in the subsequent interference cancellation iterative process, only The maximum power taps are selected from these tap groups with higher probability of interference, which can greatly reduce the number of comparisons of tap sel...

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Abstract

The invention discloses a processing method and processing equipment for a common-frequency channel estimation algorithm. The method comprises the following steps of: obtaining single-code set channel estimation results of each selected cell according to a received pilot signal; pre-screening all taps of all the cells according to an effective tap judgment threshold value to obtain effective taps; performing interference cancellation iteration for many times according to the most iteration times; and obtaining channel estimation results of a plurality of code sets after interference cancellation is performed for many times according to the most iteration times, wherein the iteration of each time comprises the acquisition of the tap with the highest power from the pre-screened effective taps and the calculation and elimination of the interference of the tap on all the other taps. By the method and the equipment, the searching range of the tap with the highest power is narrowed in the interference cancellation iteration of each time by judging the effective taps in advance, and comparison and selection are only required to be performed among all the effective taps, so the calculated amount of the algorithm can be reduced.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a method and device for channel estimation processing with an intra-frequency algorithm. Background technique [0002] The existing multi-code-set channel estimation algorithm is a multi-code-set channel estimation method using the idea of ​​serial interference cancellation. For details, please refer to the Chinese patent application No. 200510075205.7, that is, to judge the result of the single-code-set channel estimation, The dominant component of the interfering signal is formed and this interference is subtracted from the single code set channel estimation result. The interference cancellation can be iterated for many times, so as to achieve a better interference cancellation effect. figure 1 It is a schematic flowchart of a multi-code set channel estimation method in the prior art. As shown in the figure, the algorithm mainly includes the following steps: [0003]...

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Application Information

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IPC IPC(8): H04L25/02H04L25/03H04B1/7107
Inventor 张艳王嘉周海军康绍莉
Owner CHINA ACAD OF TELECOMM TECH
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