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Method and terminal for interference signal reconstruction

A technology of jamming and receiving signals, applied in the field of communication, can solve problems such as inaccurate jamming signals

Inactive Publication Date: 2015-07-08
HISILICON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of inaccuracy of the reconstructed interference signal calculated in the heterogeneous network in the prior art, an embodiment of the present invention provides an interference signal reconstruction method, and the technical solution is as follows:

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  • Method and terminal for interference signal reconstruction
  • Method and terminal for interference signal reconstruction
  • Method and terminal for interference signal reconstruction

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Embodiment 1

[0109] Please refer to figure 1 , which shows a method flowchart of the interference signal reconstruction method provided in Embodiment 1 of the present invention, the interference signal reconstruction method includes:

[0110] Step 101, modulate and demodulate the interference signal detected from the received signal, calculate one or more modulation symbols, and map each modulation symbol to a corresponding resource element RE;

[0111] When the UE performs data transmission, it will obtain the received signal from the base station, and since the received signal includes the serving signal of the serving cell and the interference signal of the interfering cell, after the UE detects the received signal, it can know the received signal The interference signal, so that the UE modulates and demodulates the interference signal in the received signal, and calculates and obtains one or more modulation symbols. And after the UE calculates and obtains the modulation symbols, it ma...

Embodiment 2

[0120] Please refer to figure 2 , which shows a method flowchart of the interference signal reconstruction method provided in Embodiment 2 of the present invention, the interference signal reconstruction method includes:

[0121] Step 201, acquire a received signal, the received signal includes a service signal and an interference signal;

[0122] In the heterogeneous network of the LTE-A system, there are many low-power nodes near the macro base station, and these low-power nodes share the same frequency band with the macro base station. Therefore, when the low-power node sends a service signal to the UE within the coverage of the low-power node and the macro base station, the UE will receive strong co-channel interference from the macro base station, and can The interference signal to be eliminated is the signal carried by the common channel of the macro base station, that is to say, the interference signal that can be eliminated is the signal carried by the PCFICH, the si...

Embodiment 3

[0170] Please refer to image 3 , which shows the method flowchart of the interference signal reconstruction method provided by Embodiment 3 of the present invention. The difference between this embodiment and Embodiment 2 is that in this embodiment, the Received signal components, modulation symbols, and channel estimation values ​​are obtained by transforming the formula and the form of the sum of the remaining items, first normalize the channel estimation value of each RE in the i REs, and then transform the received signal component, modulation symbol and channel estimation value of each RE in the i REs as The arithmetic square root of the power factor, the product of the channel estimation value and the normalized channel estimation value, and the sum of the remaining items are finally calculated by formula transformation to obtain the power factor, and are accurately calculated according to the power factor, modulation symbol and channel estimation value The reconstruc...

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Abstract

The present invention relates to the technical field of communications. Disclosed are an interference signal reconstruction method and terminal, the method comprising: modulating and demodulating an interference signal detected from a received signal, calculating to obtain one or more modulation symbols, and mapping each modulation symbol to a corresponding Resource Element (RE); calculating the corresponding channel estimate of the interference signal on the RE; calculating a power factor according to the received signal, the modulation symbol and the channel estimate, the power factor being a ratio between the signal power and the pilot power of the interference signal on each RE; calculating the reconstructed interference signal according to the modulation symbol, the channel estimate and the power factor. The present invention can accurately calculate a reconstructed interference signal, thus solving the problem of inaccurate calculation of the reconstructed interference signal in the prior art.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for reconstructing an interference signal and a terminal. Background technique [0002] In a heterogeneous network, it may include multiple base stations that can support multiple user communications. Users communicate with base stations through uplinks and downlinks, where the uplink is the communication link from the user to the base station, and the downlink is the Communication link from base station to user. However, since the base station can transmit data to one or more users on the downlink and receive data from one or more users on the uplink, this results in that on the downlink, users are receiving data from the base station will be interfered by data transmissions from adjacent base stations. [0003] In particular, since there are various types of low-power nodes in the heterogeneous network of LTE or LTE-A, such as home-based evolved base stations,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/06H04L25/02H04L27/26
CPCH04L5/0057H04L5/0073H04L25/0224H04J11/004H04L25/0204
Inventor 程铁铮
Owner HISILICON TECH