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Power delay spectrum PDP estimation method and device

A technology of power delay spectrum and time-domain channel estimation, which is applied to baseband system components and multi-frequency code systems, etc., can solve the problems of large differences in frequency-domain correlation coefficients, difficulty in implementation, and low accuracy, and achieve improved Effects of channel estimation accuracy, throughput improvement, and accuracy improvement

Active Publication Date: 2015-11-04
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0026] It can be seen that directly using the preset spectrum type as the actual PDP spectrum type will cause a large difference between the calculated frequency domain correlation coefficient and the actual
Moreover, due to the influence of noise and interference, it is difficult to achieve the actual PDP spectrum type by estimating all aspects of information contained in the PDP spectrum type, and the accuracy is not high.

Method used

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  • Power delay spectrum PDP estimation method and device
  • Power delay spectrum PDP estimation method and device
  • Power delay spectrum PDP estimation method and device

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[0041] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] In the embodiment of the present invention, such as figure 1 As shown, the detailed method flow for PDP estimation is as follows:

[0043] Step 101: Obtain time-domain channel estimation of each pilot.

[0044] Preferably, frequency-domain channel estimates of each antenna, each port, and each pilot are obtained, and the frequency-domain channel estimates are filled with zeros to a predetermined number of points, and then invers...

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Abstract

Disclosed are a power delay profile (PDP) estimation method and device, used for improving accuracy of PDP estimation. The method comprises: acquiring time-domain channel estimates of pilots; obtaining an average time-domain channel estimate according to the time-domain channel estimates of the pilots, determining an effective path according to the average time-domain channel estimate and a preset threshold, and determining a position number of the effective path in the number of points of fast Fourier transform (FFT) for performing orthogonal frequency division multiplex (OFDM); and determining a power delay profile (PDP) according to the effective path and the position number.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for estimating a power delay profile (PDP). Background technique [0002] In the new generation wireless communication system based on Orthogonal Frequency Division Multiplexing (OFDM) multi-carrier technology, channel estimation affects the performance of the whole system. [0003] In the minimum mean square error (Minimum Mean Square Error, MMSE) channel estimation algorithm can make full use of the correlation information of OFDM time domain and frequency domain to obtain excellent performance. [0004] Since the power delay profile (PDP) and the frequency domain correlation coefficient are a Fourier transform pair, if the PDP can be accurately obtained, the frequency domain correlation coefficient can be accurately obtained, so that the channel impulse response estimation and The channel impulse response of the frequency point with high frequency d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L27/26
CPCH04L25/02
Inventor 李晓皎郭保娟
Owner DATANG MOBILE COMM EQUIP CO LTD
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