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A kind of diagonal loading method and device

A technology of diagonal loading and noise matrix, applied in the direction of modulated carrier system, digital transmission system, electrical components, etc., can solve problems such as not being well determined, and achieve the effect of improving performance

Active Publication Date: 2021-08-31
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the accuracy of noise matrix estimation is improved by diagonal loading, however, the specific value of diagonal loading cannot be well determined in the prior art

Method used

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  • A kind of diagonal loading method and device
  • A kind of diagonal loading method and device
  • A kind of diagonal loading method and device

Examples

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Embodiment 1

[0038] An embodiment of the present invention provides a diagonal loading method, such as figure 1 As shown, the method may include:

[0039] Step 101. Determine a noise vector according to the received pilot signal.

[0040] The diagonal loading method provided in the embodiment of the present invention is executed by a diagonal loading device, and the diagonal loading method can be applied to a communication system.

[0041] Specifically, the diagonal loading device can calculate the noise vector by using the received pilot signal. The diagonal loading device receives a pilot signal; performs a first signal estimation on the pilot signal to determine a channel estimate before filtering, and performs a second signal estimation on the pilot signal to determine a channel estimate after filtering; The channel estimate of is subtracted from the filtered signal estimate to obtain the noise vector.

[0042] Wherein, the first signal estimation can be the least squares LS signal ...

Embodiment 2

[0071] An embodiment of the present invention provides a diagonal loading method, such as figure 2 As shown, the method may include:

[0072] Step 201, the diagonal loading device receives a pilot signal.

[0073] The diagonal loading method provided by the embodiment of the present invention can be applied in a communication system.

[0074] Step 202: The diagonal loading device performs first signal estimation on the pilot signal to determine a channel estimate before filtering, and performs second signal estimation on the pilot signal to determine a channel estimate after filtering.

[0075] Specifically, the diagonal loading device performs LS signal estimation through the received pilot signal to obtain the channel estimate before filtering, and performs minimum mean square error (MMSE, Minimum Mean Square Error) signal estimation through the received pilot signal to obtain the filtered Subsequent channel estimation. The diagonal loading device may also obtain the cha...

Embodiment 3

[0111] The embodiment of the present invention provides a diagonal loading device 1, such as image 3As mentioned, the device 1 may include: a noise vector calculation module 10, a noise matrix estimation module 11, a loading factor determination module 12, and an equalization module 13, wherein,

[0112] The noise vector calculation module 10 is used to determine the noise vector according to the received pilot signal;

[0113] The noise matrix estimation module 11 is configured to determine a noise matrix according to the noise vector;

[0114] The loading factor determination module 12 is used to determine the diagonal loading factor according to the noise power and interference power of the user's location;

[0115] The equalization module 13 is configured to determine a noise matrix after diagonal loading according to the diagonal loading coefficient and the noise matrix, and perform equalization through the noise matrix after diagonal loading.

[0116] Further, the noi...

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Abstract

The embodiment of the present invention discloses a diagonal loading method. The noise vector is determined according to the received pilot signal; the noise matrix is ​​determined according to the noise vector; the diagonal loading coefficient is determined according to the noise power and interference power at the user's location; The diagonal loading coefficient and the noise matrix are used to determine the noise matrix after the diagonal loading, and the noise matrix after the diagonal loading is used for equalization. The embodiment of the invention also discloses a diagonal loading device.

Description

technical field [0001] The invention relates to an orthogonal frequency division multiplexing system in the communication field, in particular to a diagonal loading method and device. Background technique [0002] As network capacity increases, network quality maintenance increasingly relies on eliminating interference issues. Interference Rejection Combing (IRC) uses a weight matrix to linearly combine signals received by different antennas to suppress interference caused by channel correlation. The greater the number of receiving antennas, the stronger the ability to eliminate interference. Therefore, IRC can greatly improve the quality of signal reception. [0003] The IRC needs to estimate the noise matrix, and the accuracy of the noise matrix estimation directly affects the performance of interference cancellation. In the prior art, the estimation accuracy of the noise matrix is ​​improved by diagonal loading, but the specific value of the diagonal loading cannot be w...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2691H04B7/086H04L27/26H04L27/2647
Inventor 吴昊李静
Owner ZTE CORP
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