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A SNR Estimation Method Based on Sounding Reference Signal

A technology for sounding reference signal and signal-to-noise ratio estimation is applied in the field of signal-to-noise ratio estimation. The effect of reducing the impact

Inactive Publication Date: 2016-06-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Claims
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Problems solved by technology

At present, the estimation methods based on pilot frequency mainly include maximum likelihood (Maximum Likelihood, ML) algorithm, minimum mean square error (Minimum Mean Square Error, MMSE) algorithm and Boumard algorithm, etc., but these methods are mostly based on block pilot frequency, and SRS A "comb" distribution is formed in the frequency domain, and since SRS is a transmission scheme using SC-FDMA, some traditional SNR estimation methods cannot be directly applied to SRS
On the other hand, traditional methods (such as the Boumard algorithm) usually experience a significant drop in performance at high SNRs, affecting estimation accuracy

Method used

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  • A SNR Estimation Method Based on Sounding Reference Signal
  • A SNR Estimation Method Based on Sounding Reference Signal
  • A SNR Estimation Method Based on Sounding Reference Signal

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specific Embodiment approach

[0023] The SRS sequence is inserted into subcarriers at intervals in the frequency domain, forming a "comb" structure in the frequency domain, such as figure 2 shown.

[0024] Such as figure 1 As shown, the steps of this method are as follows:

[0025] S1. Generate an SRS sequence in the frequency domain, and map the SRS sequence to a resource element (RE) according to the mode in the LTE protocol. The mapping rules are as follows: a 2 k + k 0 , l = β SRS r SRS ( k ) k = 0,1 ...

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Abstract

The present invention relates to a signal-to-noise ratio estimation technique, in particular to a method for estimating a signal-to-noise ratio of a sounding reference signal, comprising the following steps: generating an SRS sequence in the frequency domain, and mapping the SRS sequence to a resource unit ( RE) above; the specific calculation of noise estimation; calculate the average signal-to-noise ratio of the signal; calculate the sub-carrier signal-to-noise ratio. The method of the present invention can be directly applied to SRS. By using the empty carrier technology, the influence of the signal on the noise power estimation is reduced, the noise power is effectively estimated, and then accurate average signal-to-noise ratio estimation and sub-carrier signal-to-noise ratio estimation are obtained. .

Description

technical field [0001] The invention relates to a signal-to-noise ratio estimation technique, in particular to a method for estimating the signal-to-noise ratio of a sounding reference signal. Background technique [0002] As a development direction of the new generation of mobile communications, the Long Term Evolution (Long Term Evolution, LTE) is currently attracting widespread attention. In the downlink direction, the LTE system adopts Orthogonal Frequency Division Multiple Access (OFDMA) as its multiple access mode. In the uplink, in order to reduce the peak-to-average power ratio of the transmitting terminal, reduce the size and cost of the terminal, the 3GPP organization decided to use Single-Carrier Frequency Division Multiple Access (SC-FDMA) to transmit information. [0003] Two kinds of reference signals are defined in the uplink direction of LTE (LongTermEvolution): demodulation reference signal (DemodulationReferenceSignal, DMRS) and sounding reference signal (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/24H04W24/00
Inventor 田浩杨霖李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA