Method for correcting wireless transmission model in CDMA system

A wireless propagation model and propagation model technology, applied in the field of CDMA communication system, can solve time-consuming and labor-intensive problems, and achieve the effects of good portability, time saving and cost saving

Inactive Publication Date: 2004-09-15
ZTE CORP
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the time-consuming and labor-intensive shortcomin...

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  • Method for correcting wireless transmission model in CDMA system
  • Method for correcting wireless transmission model in CDMA system
  • Method for correcting wireless transmission model in CDMA system

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Embodiment Construction

[0018] Combine below figure 1 , the present invention will be described in detail.

[0019] The correction of the wireless propagation model mainly includes two steps of extracting the data required for model correction and processing the data. The data required for model calibration is actual network test data. In the actual network optimization process, a lot of network test data will be accumulated through DT (driver test) for optimization analysis and adjustment. The present invention uses the forward received power data in these existing test data to correct the local wireless propagation model.

[0020] Because the CDMA system has the characteristics of power control, the transmit power of the base station at a certain moment is related to the traffic carried by it. In order to eliminate the error caused by the randomness of the base station transmission power during the test, the present invention proposes to use the test results under the state of no load and only t...

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Abstract

The method picks up data needed for correcting model by using data of tested forward received power in test data of actual network. Treating data includes following steps: accounting information of latitude and longitude of transmitting site in each subzone within network, transmitting power and antenna parameter of each subzone; calculating effective radiated power in each direction for each subzone, and distance between test point and transmitting site in each subzone; fitting of multielement non-linear regression method is utilized so as to obtain parameters of propagation model. Comparing with prior art, the invention uses tested data to correct model, omitting a series of works such as selecting station site, erecting antenna, driving cars for testing etc. The invention saves time, raises work efficiency providing model with high precision, and good portability.

Description

technical field [0001] The invention relates to a CDMA (Code Division Multiple Access) communication system, in particular to a method for correcting wireless propagation model parameters in network simulation. Background technique [0002] The wireless propagation environment is an important factor affecting the performance of wireless communication systems. In a communication system, the wireless propagation path between the transmitter and the receiver is very complicated. The signal sent from the transmitter may reach the receiving point after reflection, scattering, and diffraction. The loss of this wireless path is called path loss. Path loss is closely related to the propagation environment, the worse the wireless propagation environment, the greater the path loss. [0003] The wireless propagation model describes the characteristics of the wireless propagation environment in the form of mathematical formulas, and calculates the propagation path loss. The wireless p...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B17/391H04J13/02H04L12/26H04M3/22H04W24/00
CPCY02D30/70
Inventor 柴文晔陈健李晟
Owner ZTE CORP
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