System and method for vector magnitude error measurement for nb_iot broadcast channel
A vector magnitude error, broadcast channel technology, applied in transmission systems, multi-frequency code systems, digital transmission systems, etc., can solve problems such as increasing complexity, increasing data processing links, vector magnitude error, etc., to improve anti-interference ability. , the effect of speeding up the calculation speed and improving the measurement accuracy
Active Publication Date: 2021-09-03
TRANSCOM INSTR
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Problems solved by technology
[0003] For NB-IoT signal analysis, the traditional method usually uses an offset calibration, and the original code stream of the broadcast channel is used to construct a reference vector. This method will not allow the maximum calibration of the frequency offset in the signal, which will cause The calculation of the amplitude error is inaccurate; at the same time, the original code stream is demodulated, and then the reference vector is constructed, which increases the link of data processing, increases the complexity and reduces the operation efficiency
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[0065] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.
[0066] The system for measuring vector magnitude errors for NB_IoT broadcast channels, wherein the system includes:
[0067] The signal extraction module is used for extracting and converting the initial signal;
[0068] The positioning calibration module is connected with the signal extraction module, and is used to determine the synchronization position of the wireless frame for the processed data;
[0069] The calculation processing module is connected with the positioning calibration module, and is used to perform Fourier transform on the data, and calculate the vector magnitude error according to the narrowband broadcast channel reference signal and the measurement signal.
[0070] Preferably, the signal extraction module includes:
[0071] The signal receiving and processing unit is used for perform...
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The present invention relates to a system for measuring vector amplitude errors for NB_IoT broadcast channels, including a signal extraction module for extracting and converting initial signals; a positioning calibration module connected with the signal extraction module for The processed data determines the synchronous position of the wireless frame; the calculation processing module is connected with the positioning calibration module, and is used to perform Fourier transform on the data, and calculate the vector magnitude according to the narrowband broadcast channel reference signal and the measurement signal error. The present invention also relates to a method for realizing vector magnitude error measurement for NB_IoT broadcast channel. The system and method are adopted to effectively improve the anti-interference ability of signal demodulation and the performance of EVM calculation by combining the accurate calibration of the frequency offset in the frequency domain and the time domain, as well as the efficient calibration of the phase error. The way to construct the reference vector not only reduces the complexity of the operation, but also improves the measurement accuracy of the vector magnitude error.
Description
technical field [0001] The present invention relates to the field of mobile communication, in particular to the field of fault detection of mobile communication base stations, and specifically refers to a system and method for measuring vector magnitude errors for NB_IoT broadcast channels. Background technique [0002] With the continuous advancement of NB-IoT technology development, the gradual maturity of NB-IoT technology, and the large-scale network deployment of operators, NB-IoT signal analysis and testing instruments, as a key component of the industry chain, have attracted widespread attention from the industry. As an important guarantee for the R&D and production of base stations and terminals, NB-IoT signal analysis and testing instruments are playing an increasingly important role. As an important link in the research and development and production of base stations and terminals, NB-IoT signal analysis instruments are playing an increasingly important role. [0...
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IPC IPC(8): H04L27/26H04L27/00
CPCH04L27/0014H04L27/2656H04L27/2657H04L27/2672H04L27/2695H04L2027/0026
Inventor 王志陈向民陈爽
Owner TRANSCOM INSTR