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Self-adaption frequency domain interpolation method and self-adaption frequency domain interpolation system

A frequency domain interpolation and self-adaptive technology, applied in baseband system components and other directions, can solve the problems of high QPSK operating point, unable to obtain optimal throughput, unable to obtain optimal performance, etc., to achieve excellent throughput performance, low Achieving the effect of complexity

Active Publication Date: 2016-07-27
SANECHIPS TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, when the number of layers is high or the channel becomes medium-high correlation, the working point of QPSK will also become high. At this time, if FI0 is still fixed, the optimal performance cannot be obtained.
like Figure 5 As shown, the horizontal axis in the figure represents SNR, and the vertical axis represents throughput; from the related examples in this QPSK, 4-layer, extended walking model (EPA, Extended PedestrianAmodel) 5, it can be seen that in the low signal-to-noise ratio (SNR, SignalNoiseRatio) ( Figure 5 The performance of FI0 is the best under medium SNR below 9dB), and the performance of FI0 is the best at high SNR ( Figure 5 The performance of FI2 is the best when the medium SNR is higher than 11dB), so neither the fixed selection of FI0 nor the fixed selection of FI2 can achieve the optimal throughput performance.
That is to say, the conventional method of fixedly selecting FI cannot always obtain the optimal throughput performance

Method used

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Embodiment 1

[0061] An adaptive frequency domain interpolation method provided by Embodiment 1 of the present invention, such as Figure 6 As shown, the method mainly includes:

[0062] Step 101, determine a first threshold for FI mode selection.

[0063] Wherein, the determining the first threshold value for selecting the FI mode includes:

[0064] Traverse the performance simulation data of different FI modes, and select the first threshold value R as an intermediate SNR value of the transition zone in the performance simulation data.

[0065] Step 102, measure and obtain the signal-to-noise ratio (SNR) value of the current channel, compare the SNR value with the corresponding first threshold value, and select the corresponding FI mode according to the comparison result.

[0066] Wherein, the measurement obtains the SNR value of the current channel, including:

[0067] Measure the reference signal received power RSRP and noise power N of the current channel 0 ;

[0068] Calculate th...

Embodiment 2

[0082] Corresponding to the adaptive frequency domain interpolation method described in Embodiment 1 of the present invention, Embodiment 2 of the present invention provides an adaptive frequency domain interpolation device, such as Figure 7 As shown, the device includes:

[0083] A parameter determination unit 10, configured to determine a first threshold for FI mode selection;

[0084] The FI selection unit 20 is configured to measure and obtain the SNR value of the current channel, compare the SNR value with the corresponding first threshold value, and select the corresponding FI mode according to the comparison result.

[0085] Wherein, the parameter determination unit 10 is further configured to traverse performance simulation data of different FI modes, and select the first threshold value R as an intermediate SNR value of a transition zone in the performance simulation data.

[0086] The FI selection unit 20 is further used to measure the reference signal received pow...

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Abstract

The invention discloses a self-adaption frequency domain interpolation method and a self-adaption frequency domain interpolation system. The self-adaption frequency domain interpolation method is characterized in that a first threshold value used for selecting frequency domain interpolation (FI) way can be determined; a SNR (Signal to Noise Ratio) value of a current channel can be measured and acquired, and then the SNR value can be compared with the corresponding first threshold value, and according to the comparison result, the corresponding FI way can be selected.

Description

technical field [0001] The invention relates to channel estimation technology in the field of wireless communication, in particular to an adaptive frequency domain interpolation method and system. Background technique [0002] In wireless communication systems, in order to ensure that system performance is not affected by channel multipath and fading effects, channel estimation methods are required to track changes in channel response. The purpose of channel estimation is to estimate the time domain or frequency domain response of the channel according to the pilot signal. [0003] The reference information used for channel estimation comes from the pilot, and the pilot cannot occupy too much overhead in the entire resource, otherwise the efficiency of the entire communication system will be greatly reduced. Channel estimation is to first estimate the channel response value of the pilot position according to the pilot signal, and then interpolate the channel response value ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
CPCH04L25/02
Inventor 王俊
Owner SANECHIPS TECH CO LTD
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