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Method and device for measuring signal to noise ratio and application thereof

A measurement method and technology of a measurement device, which are applied in the field of communication, can solve problems such as poor demodulation performance, inability to effectively distinguish DTXACK/NACK, etc., and achieve the effect of ensuring demodulation performance

Active Publication Date: 2010-06-09
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0009] In the process of realizing the present invention, the inventor found that the prior art has at least the following disadvantages: the two schemes cannot effectively distinguish between DTX (Discontinuous Transmission) and ACK / NACK, and the demodulation performance is poor

Method used

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  • Method and device for measuring signal to noise ratio and application thereof
  • Method and device for measuring signal to noise ratio and application thereof
  • Method and device for measuring signal to noise ratio and application thereof

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Embodiment Construction

[0041] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementations.

[0042] Such as figure 1 Shown, is the flow chart of a kind of signal-to-noise ratio measurement method of the present invention, mainly comprises the following steps:

[0043] Step 101, performing frequency domain denoising on the received uplink signal.

[0044] Preferably, firstly, the pilot point receiving signal in the received uplink signal is obtained, and the pilot channel estimation value is obtained according to the pilot point receiving signal; then, the data in each time slot and the pilot channel estimation are respectively The value is averaged for denoising.

[0045] Of course, the embodiment of the present invention is not limited to this noise elimination method, and other noise elimination met...

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Abstract

The invention discloses a method and a device for measuring signal to noise ratio, and application thereof. The method comprises the following steps of: performing frequency-domain de-noising on a received uplink signal; performing fast Fourier inverse transform on the uplink signal subjected to the frequency-domain de-noising to acquire a time-domain channel impulse response; acquiring the power of each tap according to the time-domain channel impulse response; and utilizing the power of each time-domain tap to estimate the signal to noise ratio. Through the method and the device for measuring the signal to noise ratio, and the application thereof, the signal to noise ratio of the uplink signal in a long-term evolution LTE system can be effectively measured and the demodulation performance of blind detection on uplink acknowledgement response ACK or non-acknowledgement NACK signals is ensured.

Description

technical field [0001] The invention relates to communication technology, in particular to a signal-to-noise ratio measuring method, device and application thereof. Background technique [0002] The LTE (Long Term Evolution) project is an evolution of 3G. It improves and enhances the air access technology of 3G, adopts OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) and MIMO (Multiple-Input Multiple-Out-put , multiple input and output) as the standard for its wireless network evolution. It effectively improves the performance of cell edge users, increases cell capacity and reduces system delay. [0003] In a digital communication protocol, the data receiver usually replies with an ACK / NACK signal to the sender to inform the sender whether the data has been received correctly. If the receiver successfully receives the data, it will reply with an ACK (acknowledgment response) signal; otherwise, it will reply with a NACK (negative...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04L27/26H04L1/00H04L1/16
Inventor 陆会贤邱海杰黄琛于洋
Owner DATANG MOBILE COMM EQUIP CO LTD
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