Improved MUSIC algorithm scattering cluster model channel parameter estimation method

A channel parameter and model technology, applied in the field of channel parameter estimation of the improved MUSIC algorithm scattering cluster model, can solve problems such as inapplicability of the scattering cluster model, and achieve the effect of solving the channel parameter estimation problem with less time-consuming and low complexity

Inactive Publication Date: 2018-03-30
TIANJIN UNIV
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Problems solved by technology

However, the SAGE algorithm is not suitable for scattering cluster models because the emission signals are highly correlated

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  • Improved MUSIC algorithm scattering cluster model channel parameter estimation method
  • Improved MUSIC algorithm scattering cluster model channel parameter estimation method
  • Improved MUSIC algorithm scattering cluster model channel parameter estimation method

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[0069] The time-of-arrival (TOA), direction-of-arrival (DOA) and Doppler frequency of the scattering cluster model are estimated by a modified multiple signal classification (MUSIC) algorithm. Taking advantage of the spatiotemporal characteristics of multiple channels, the proposed algorithm combines temporal filtering techniques and spatial domain smoothing techniques to separate and estimate incident rays. Compared with the SAGE algorithm, the improved MUSIC algorithm has the following advantages: high precision, reduced calculation, and reduced complexity.

[0070] The traditional SAGE algorithm does not work for models based on scattering clusters because it performs very poorly when the emission signals are highly correlated. Since the rank of the correlation matrix is ​​the number of clusters and not the number of rays, the conventional MUSIC algorithm cannot be directly used for the scattering cluster model either. So we make some modifications based on the traditional...

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Abstract

The invention relates to the field of channel models and channel parameter estimation algorithms, and provides a new scattering cluster model channel parameter estimation method having the characteristics of being high in accuracy, decreased in calculated quantity and reduced in complexity. The technical scheme provided by the invention is as follows: the improved MUSIC algorithm scattering cluster model channel parameter estimation method has the following steps of 1, building a system model, wherein a frequency array response array B(f) is L frequency sampling in short time, fs indicates a sampling rate, FORMULA (the formula is as shown in the specification), wherein S(T-[tau])=[S(t-[tau]1), ..., S(t-[tau]D) ]<T> indicates a transmitting signal with delay [tau]; and 2, improving a MUSICalgorithm in the system model, including 2.1, using a time domain filtering method, and 2.2, using an airspace smoothing method to acquire a frequency spectrum: FORMULA (the formula is as shown in thespecification). The method provided by the invention is mainly applied to the channel models and channel parameter estimation occasions.

Description

technical field [0001] The invention relates to the fields of channel models and channel parameter estimation algorithms. Specifically, it involves the channel parameter estimation method of the improved MUSIC algorithm scattering cluster model. Background technique [0002] Estimation of air / time domain parameters in received signals is important in radar, sonar, and wireless communication systems, such as direction of arrival (DOAs), path delay, frequency, etc. It can also be applied to source location, accident reporting, cargo tracking and intelligent transportation. For example, accurate estimation of DOA and ray frequency in wireless communication channels can provide better channel information to significantly improve performance and increase interference immunity in terms of coverage area, capacity, and quality of service (QoS). On the other hand, an effective channel model must rely on the realistic characteristics of the probability distribution of the relevant c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
CPCH04L25/0202H04L25/0242
Inventor 杨晋生蒋大圆杨梓
Owner TIANJIN UNIV
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