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Automatic detection method of dynamic and static multi-path channels

An automatic detection, dynamic and static technology, applied in baseband system components, transmitter/receiver shaping network, etc., can solve the problem of how to effectively distinguish between dynamic multipath channels and static multipath channels, so as to improve accuracy , the effect of reducing the estimation error

Active Publication Date: 2014-05-21
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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Problems solved by technology

However, there is currently no method for effectively distinguishing dynamic multipath channels from static multipath channels in the prior art.

Method used

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  • Automatic detection method of dynamic and static multi-path channels
  • Automatic detection method of dynamic and static multi-path channels
  • Automatic detection method of dynamic and static multi-path channels

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Embodiment 1

[0040] Taking the tu6 channel model as an example, get i=1~1800, j=0~5 (tu6 channel has 6 paths), the dynamic and static multipath channel automatic detection method of the present invention is as follows:

[0041] (1) Calculate the complex number P separately ij Corresponding amplitude A ij and phase θ ij .

[0042] (2) Make the amplitude A ij and phase θ ij After the frame delay unit, set the number of delayed frames as D=1, and calculate the amplitude A of 1 frame delay (i-1)j and phase θ (i-1)j .

[0043] (3) Subtract the amplitude and phase of one frame delay from the amplitude and phase of the current frame respectively, and obtain the amplitude difference and phase difference as follows:

[0044] ΔA ij =A ij -A (i-1)j ;

[0045] Δθ ij = θ ij -θ (i-1)j .

[0046](4) In order to remove the dimension, the weights of amplitude difference and phase difference in judging dynamic and static multipath channels are adjusted at the same time, and the amplitude diff...

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Abstract

The invention provides an automatic detection method of dynamic and static multi-path channels. The automatic detection method comprises the following steps of: respectively calculating amplitudes and phases corresponding to multi-paths and amplitudes and phases of a time delay D frame to obtain an amplitude difference and a phase difference; respectively summarizing absolute values of a normalized amplitude difference and a normalized phase difference, and calculating intermediate variables Ei; and sending E'i obtained by averaging the intermediate variables and subjected to smoothing filtering to a detection module, and displaying a judgment result of the dynamic and static multi-path channels by the detection module according to the E'i change. In the automatic detection method of the dynamic and static multi-path channels provided by the invention, the amplitude and phase information of the multi-paths is comprehensively considered, and the dynamic multi-path channels and the static multi-path channels can be distinguished correctly and stably; if the detection result is the static multi-path channels, an estimation variance can be reduced by using a method of averaging channel estimation, and the precision of channel equalization is improved.

Description

technical field [0001] The invention relates to the field of wireless communication digital reception, in particular to a dynamic and static multipath channel automatic detection method. Background technique [0002] In the wireless communication process, especially the ground wireless communication, the multipath effect and the Doppler effect are the most notable characteristics. The multipath effect is manifested as intersymbol interference in the time domain and frequency selective fading in the frequency domain; the Doppler effect is mainly caused by the relative movement between the transmitter and receiver, and is manifested in the time domain as the magnitude of the multipath In the frequency domain, the frequency domain response of the channel changes with time; when the carrier frequency is constant, the Doppler frequency shift (unit Hz) is proportional to the relative moving speed, the faster the moving speed, the Doppler The larger the Le frequency shift, the fas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L25/03
Inventor 陈岩
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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