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Channel parameter estimation method and system

A channel parameter and parameter estimation technology, which is applied in the field of parameter estimation of wireless communication channels, can solve the problems of high computational complexity of the subspace method and weak estimation ability of weak paths, and achieves the effect of improving estimation ability and computing speed.

Active Publication Date: 2012-01-04
BEIJING UNIV OF POSTS & TELECOMM
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  • Application Information

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Problems solved by technology

The above methods have their own advantages and disadvantages. For example, the computational complexity of the subspace method is greater than that of the beamforming method, and the SAGE algorithm has weaker ability to estimate weak paths, etc.

Method used

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  • Channel parameter estimation method and system
  • Channel parameter estimation method and system
  • Channel parameter estimation method and system

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Embodiment 1

[0029] figure 1 is a flow chart of the channel parameter estimation method according to Embodiment 1 of the present invention, and the following refers to figure 1 Each step of the method is described in detail.

[0030] In step S110, the channel parameters are initialized by using the beamforming method, and the number of initialized paths is determined.

[0031] In this step, the path of the channel is initialized to obtain the initial value of the parameter of the path. Calculate the (full) spatial correlation matrix from the measured channel impulse response matrix to obtain the dual-angle power spectrum, and then sequentially obtain the four angles (horizontal angle of departure angle, vertical angle of departure angle, horizontal angle of arrival angle, and Vertical angle), the initial value of Doppler, the polarization complex amplitude matrix, and finally the initial values ​​of all parameters are obtained to form the initial parameter set. At the same time, the tot...

Embodiment 2

[0112] Figure 6 It is a structural diagram of a channel parameter estimation system according to Embodiment 2 of the present invention, according to the following Figure 6 Describe the structure of the system in detail.

[0113] initialization unit : It uses the beamforming method to initialize the channel, obtains the initial value of the channel parameter set, and determines the number of initialized paths;

[0114] parameter estimation unit : It divides the multipath packets in the delay domain, based on the initial value of the channel parameter set, performs parameter estimation on the paths of the initialization path quantity in the form of multipath packets, and obtains the parameter set of each path selected ;

[0115] Validity Judgment Unit : It judges whether the path is discarded based on the estimated parameter set of each path.

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Abstract

The invention discloses a channel parameter estimation method and a channel parameter estimation system. The method comprises the following steps of: A, initializing a channel by utilizing a beamforming method to obtain initial values of a channel parameter set, and determining an initialized path number; B, dividing a multi-path packet in a time delay domain, and performing parameter estimation on paths in the initialized path number in a multi-path packet way based on the initial values of the channel parameter set to obtain parameter sets of each selected path; and C, judging whether the paths are abandoned or not based on the estimated parameter sets of each path. The method and the system are more consistent with a transmission mechanism in which the paths exist in clusters in a wideband system, and are applied to the processing of massive data; and arithmetic speed is increased.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to the parameter estimation of the wireless communication channel. Background technique [0002] The development of mobile communication is changing with each passing day. From the first-generation cellular mobile communication system to the fourth-generation advanced international mobile communication (IMT-Advanced) system widely studied at present, the transmission rate of the system is continuously increasing, and the bandwidth is continuously increasing. Loss, space-time correlation, frequency selectivity and many other aspects will show new characteristics, which will pose new challenges for system design. Therefore, the study of wireless channel propagation characteristics is the premise and key to the study of future mobile communication technologies. [0003] It is the best way to understand the characteristics of the real channel to measure the wireless channel in var...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04B7/06H04B7/08
Inventor 张建华张平高新颖熊艳伟
Owner BEIJING UNIV OF POSTS & TELECOMM
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