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Measuring device and measuring method of signal power in orthogonal frequency division multiplexing (OFDM) system

A technology of signal power and measuring device, applied in transmission system, multi-frequency code system, wireless communication and other directions, can solve the problem of signal power measurement value being too large, affecting the accuracy of signal power, etc., and achieve the effect of accurate measurement value

Active Publication Date: 2013-07-03
LEADCORE TECH
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AI Technical Summary

Problems solved by technology

[0008] In this traditional approach, in is ideal channel estimation, e is noise, when noise and If it cannot be ignored, it will cause the measured value of the signal power to be too large, thus affecting the accuracy of the signal power measurement

Method used

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  • Measuring device and measuring method of signal power in orthogonal frequency division multiplexing (OFDM) system
  • Measuring device and measuring method of signal power in orthogonal frequency division multiplexing (OFDM) system
  • Measuring device and measuring method of signal power in orthogonal frequency division multiplexing (OFDM) system

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Embodiment Construction

[0061] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0062] The first embodiment of the signal power measuring device of OFDM system

[0063] image 3 The principle of the first embodiment of the signal power measuring device of the OFDM system of the present invention is shown. See image 3 , the signal power measurement device of the OFDM system in this embodiment includes: a time-frequency conversion module 10 , an initial channel estimation module 11 , and a signal power measurement module 12 . Signal power measurement module 12 includes such as Figure 9 Shown are a signal power range selection unit 70 , a segmentation unit 72 , an average value unit 74 , and a signal power calculation unit 76 .

[0064] The time-frequency conversion module 10 is connected to a channel initial estimation module 11 , and the channel initial estimation module 11 is connected to a signal power measurement module 1...

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Abstract

The invention discloses a measuring device and a measuring method of signal power in an orthogonal frequency division multiplexing (OFDM) system, By means of the measuring method and the measuring device, the accuracy of signal power measurement is improved. The measuring method includes the steps of: converting time domain data of a base band into frequency domain data of the base band, obtaining modulation signs carried by all the sub-carriers, estimating channels of reference signals primarily, and measuring the signal power. The measuring method further includes the steps of: selecting the frequency domain range and the time domain range of the measured signal power of the antenna ports; Segmenting the frequency domain range and the time domain range in rows and in columns; calculating mean value of elements in each section; and computing the signal power of each antenna port according the mean values of the elements in the sections.

Description

technical field [0001] The invention relates to a signal power measurement technology, in particular to a signal power measurement device and method for an OFDM (Orthogonal Frequency Division Multiplexing) system. Background technique [0002] OFDM (Orthogonal Frequency Division Multiplexing) is a high-speed transmission technology in a wireless environment, suitable for transmitting high-speed data in wireless mobile channels with multipath propagation and Doppler frequency shift. It can effectively combat multipath effects, eliminate inter-symbol interference, resist frequency selective fading, and have high channel utilization. With so many advantages, this technology is widely used at present and is the core technology of the fourth generation mobile communication . [0003] In the actual communication system, the propagation environment of the wireless channel is complex. In order to improve the performance of the system, it is necessary to use channel estimation techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B17/00H04W24/08
CPCY02D30/70
Inventor 郭华永王乃博
Owner LEADCORE TECH
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