Rician factor estimation method and system

A factor and Rice technology, applied in the Rice factor estimation method and system field, can solve the problems of affecting the received signal, fading, and not applicable to vehicle mobile communication, etc., and achieve the effect of improving the estimation accuracy

Active Publication Date: 2017-06-13
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

However, this model is not suitable for vehicular mobile communication in a typical urban environment, because the relative motion of the transmitter and receiver will cause random fading and affect the received signal

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  • Rician factor estimation method and system
  • Rician factor estimation method and system
  • Rician factor estimation method and system

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Embodiment Construction

[0031] The present invention will be described in detail, clearly and completely below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] figure 1 It is a schematic flowchart of a Rice factor estimation method provided by an embodiment of the present invention. Such as figure 1 As shown, the method includes steps 101-104:

[0033] Step 101: use Nagakami distribution to model the main path component of the received samples to obtain a received sample model.

[0034] Denote the lth received sample obtained after preprocessing and digital sampling as r l , where l=1,...,L, where L is the total number of received samples. The r...

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Abstract

The invention discloses a Rician factor estimation method and system. The method comprises the steps of: modeling main path components of a received sample by utilizing Nagakami distribution, thereby obtaining a received sample model; according to the received sample model, calculating a second-order moment, a fourth-order moment and a sixth-order moment of the received sample, building and solving an equation set of estimation parameters, thereby obtaining numerical values of the estimation parameters; and estimating a Rician factor according to the numerical values of the estimation parameters. The system comprises a first calculation module, a second calculation module and a third calculation module. According to the Rician factor estimation method and system, the main path components of the received sample are modeled by utilizing the Nagakami distribution, and the second-order moment, the fourth-order moment and the sixth-order moment of the received sample are calculated in order to build the equation set of the estimation parameters and establish a likelihood function of the received sample, so that estimation precision of the Rician factor can be effectively improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a Rice factor estimation method and system. Background technique [0002] In vehicular mobile communication, multipath seriously affects the propagation of wireless signals. In fact, roadside buildings, trees, and other obstacles can cause random signal fading, and when signal strength gets low, communication between vehicles can become very difficult. People use the energy ratio of the main path (signal path) and the auxiliary path (all non-signal paths) to measure the fading degree of the wireless multipath channel, which is called Rice (Rician) factor. The name is derived from the well-known Rice model, whereby the magnitude of the received signal follows a Rice distribution when it is a complex constant (corresponding to the main path) plus a complex Gaussian random variable (corresponding to all auxiliary paths). The purpose of introducing the Rice factor is...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/391
CPCH04B17/3911
Inventor 郝程鹏闫晟司昌龙陈模江张立军鄢社锋
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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