Methods for Estimating Interference and Noise Power in LTE/Lte‑a Systems

A noise power, LTE-A technology, applied in the baseband system, transmission system, multi-frequency code system, etc., can solve problems such as the inability to improve the performance of the LTE/LTE-A system, and achieve improved implementation effects, improved estimation effects, and high The effect of precision

Inactive Publication Date: 2017-04-19
SHANGHAI RES CENT FOR WIRELESS COMM
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  • Application Information

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Problems solved by technology

[0007] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a method for estimating interference and noise power in an LTE / LTE-A system, which is used to solve various traditional noise power estimation methods that cannot be improved due to their respective deficiencies. Problems with LTE / LTE-A system performance

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  • Methods for Estimating Interference and Noise Power in LTE/Lte‑a Systems
  • Methods for Estimating Interference and Noise Power in LTE/Lte‑a Systems
  • Methods for Estimating Interference and Noise Power in LTE/Lte‑a Systems

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Embodiment 1

[0043] figure 2 It is a flow chart of Embodiment 1 of the method for estimating interference and noise power in the LTE / LTE-A system of the present invention. The following combination figure 2 , the first embodiment of the method for estimating interference and noise power in the LTE / LTE-A system of the present invention will be described in detail.

[0044] In this embodiment, the primary synchronization signal (PSS) is used to estimate the power of interference and noise, the sequence length of subcarriers is L=62, and there are 61 subcarrier pairs.

[0045]Step S100, after the synchronization channel synchronization process is completed, the actual received value of the main synchronization signal is obtained. Specifically, after the synchronization process of the synchronization channel is completed, the actual received value sequence Y(k) of the subcarriers in the channel is obtained, k=0, 1, 2, ..., 61, and the corresponding actual transmitted value sequence of the ...

Embodiment 2

[0063] image 3 It is a flow chart of Embodiment 2 of the method for estimating interference and noise power in the LTE / LTE-A system of the present invention. The following combination image 3 , the second embodiment of the method for estimating interference and noise power in the LTE / LTE-A system of the present invention will be described in detail.

[0064] In this embodiment, the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) are used to estimate the interference and noise power respectively, and then the two results are combined. The sequence length of subcarriers is L=62, and there are 61 pairs of subcarriers.

[0065] Such as image 3 As shown, this embodiment is divided into the following three steps:

[0066] Step S21, estimating interference and noise power with the primary synchronization signal;

[0067] Step S23, using the secondary synchronization signal to estimate interference and noise power;

[0068] Step S25, merging...

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Abstract

The present invention provides a method for estimating interference and noise power in an LTE / LTE-A system. A primary synchronization signal or a secondary synchronization signal is used to estimate interference and noise power; or the primary synchronization signal and the secondary synchronization signal are both used to estimate interference and noise power, and two estimation results are combined. An estimation process comprises the following steps: after synchronization is complete, according to an actual sending value and an actual receiving value of a current subcarrier, calculating a channel coefficient estimated value of the current subcarrier; calculating an estimated receiving value of an adjacent subcarrier; carrying out differential correlation calculation on an actual receiving value and the estimated receiving value of the adjacent subcarrier; carrying out statistical average calculation on a result of the differential correlation calculation; calculating an estimated value of interference and noise power. The present invention utilizes a synchronization channel signal to estimate interference and noise power, which improves the effect of estimating interference and noise power, thereby improving the effect of implementing the OFOM and MIMO technology, and improving system performance.

Description

technical field [0001] The invention relates to a method for estimating interference and noise power in an LTE / LTE-A system. Background technique [0002] LTE (Long Term Evolution, long-term evolution) / LTE-A (Long Term Evolution Advanced, long-term evolution enhancement) system is one of the mainstream systems of B3G (Beyond Third Generation in mobile communication system, super three-generation mobile communication system), its physical layer Main technologies include Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (Multiple Input Multiple Output, MIMO) technologies. The accuracy of the interference and noise power estimates has a strong impact on the implementation of the two techniques. In channel estimation, MIMO equalization, and channel decoding, the accuracy of interference and noise power estimation directly affects the effect of the implementation of the above technologies. Accurate interference and noise power estimation can si...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04L25/02H04L27/26
CPCH04L25/03821
Inventor陈永岭胡宏林杨秀梅张镝桂云松舒睿俊徐景朱正航
OwnerSHANGHAI RES CENT FOR WIRELESS COMM