Orthogonal frequency division multiplexing (OFDM) signal demodulation method of signal analyzer
A signal analyzer and signal demodulation technology, which is applied in the field of signal analyzer OFDM signal demodulation, can solve the problems of high measurement accuracy and unsuitability for signal analyzers
Active Publication Date: 2018-04-13
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
View PDF4 Cites 14 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Different from the receiver, the main purpose of the signal analyzer is to test and analyze the signal, and realize the test of the device under test through the test and analysis of the signal. Suitable for Signal Analyzers
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0090] The basic idea of the present invention is: for the OFDM standard signal in the WLAN application, based on the signal analyzer platform, a pure software mode is used to design a complete demodulation test and analysis scheme of OFDM signal, so that the signal analyzer has the OFDM signal demodulation test function, It meets the modulation quality test requirements of WLAN transmitting equipment, and also provides a general demodulation test method for OFDM signal testing in wireless communication standards.
[0091] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0092] Such as image 3 Shown, a kind of signal analyzer OFDM signal demodulation method comprises the steps:
[0093] s1. Pulse search
[0094] In a WLAN application, it is first judged whether the OFDM signal is in the form of a pulse. For an OFDM signal in the form of a pulse, a pulse capture operation needs to be performed be...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
This invention discloses an orthogonal frequency division multiplexing (OFDM) signal demodulation method of a signal analyzer. The method is based on a signal analyzer platform, a complete demodulation test analysis scheme of OFDM signals is designed by using a pure software mode, so that the signal analyzer has an OFDM signal demodulation test function to satisfy the modulation quality test needsof the OFDM signals in a wireless local area network (WLAN) transmitting device, and meanwhile a universal demodulation test means is also provided for the test of the OFDM signals in a wireless communication standard. The method mainly comprises the steps of pulse search, sampling rate transformation, frame synchronization, carrier synchronization, OFDM symbol demodulation, channel estimation and equalization, modulation parameter analysis, pilot tracking and decoding, and parameter output. As the OFDM signal demodulation method disclosed by the invention is implemented in the pure softwaremode, the cost is low, and the portability is good. At the same time, high-precision demodulation and parameter calculation are realized by using the pilot tracking technology, therefore the OFDM signal demodulation test needs of high-precision measuring instruments can be satisfied.
Description
technical field [0001] The invention relates to a signal analyzer OFDM signal demodulation method. Background technique [0002] With the rapid development of wireless communication technology, wireless local area network (WLAN) and its products are widely used, such as short-distance wireless communication, industrial control, smart home and so on. A wide range of applications and numerous unlimited devices hide a huge market testing demand. At the same time, as an important test instrument in the field of electronic communication, the signal analyzer has developed from a basic spectrum test to a multi-functional instrument integrating spectrum power test, equipment fault diagnosis, complex modulation signal analysis and other functions. [0003] The important signal transmission technology adopted by the current WLAN equipment is Orthogonal Frequency Division Multiplexing (OFDM) technology, so if the signal analyzer is to test the WLAN equipment, it must be capable of tes...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H04L27/26
CPCH04L27/2649H04L27/2656H04L27/2657
Inventor 韩翔王峰周钦山
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP