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Television white frequency spectrum anti-interference system based on WiFi chip and method

A technology of white spectrum and TV, which is applied in the field of TV white spectrum anti-jamming system, which can solve the problems that affect the call quality of the terminal and the terminal cannot establish a normal call, so as to improve the anti-jamming ability and reduce the effect of spectrum scattering

Active Publication Date: 2017-03-08
成都米风感知科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

When the carrier-to-interference ratio C / I of co-channel interference is less than a certain value, it will directly affect the call quality of the terminal, and in severe cases, the terminal cannot establish a normal call

Method used

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  • Television white frequency spectrum anti-interference system based on WiFi chip and method

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with specific embodiment:

[0018] A TV white spectrum anti-jamming system based on a WiFi chip, including the following parts: a spread spectrum anti-jamming module, which is used to spread the useful signal on the frequency band, so that the power in the unit frequency band becomes smaller, and the power spectral density of the signal becomes lower , so that the signal is submerged in the noise; the frequency hopping anti-jamming module is used to perform frequency shift keying through the spread spectrum code sequence, so that the carrier frequency continuously hops and spreads the spectrum; the antenna zeroing anti-jamming module is used for space For various interferences from different directions, the adaptive antenna adjusts its amplitude and phase distribution, and the lobe forms a zero point in these interference directions, thereby reducing or avoiding the influence of interference signals; th...

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Abstract

The invention discloses a television white frequency spectrum anti-interference system based on a WiFi chip and a method. The system comprises a spread spectrum anti-interference module, a frequency hopping anti-interference module and a combination anti-interference module. The system and the method are advantageous in that: the anti-interference ability of a frequency hopping communication system can be effectively improved; much filtering can be performed without influencing integrity of signals; and under the conditions that the intensity of a transmission signal is lower (3dB) and the peak-to-average ratio (PAR) still allows a power amplifier to fully work in a linear state, the frequency spectrum scattering is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of digital television and wireless communication. In particular, it relates to a TV white spectrum anti-jamming system and method based on a WiFi chip. Background technique [0002] Actual measurements show that the white spectrum is a noisy environment. High-power transmitters, such as 200kW, can transmit over thousands of kilometers. In fact, the TV white spectrum is a gray area, and the usable white spectrum actually contains noise -70dBm / 5MHz. In such a bad environment, the performance requirements of the receiver are relatively high. MiWIND receiver adopts an innovative MIMO technology, which can reduce the co-channel interference CCI (Co-Channel Interference) from the TV transmitter higher than 20dB, but some high-power transmitters will still cause blocking interference. [0003] Currently there are the following types of interference: According to the interference between network elements, it can...

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Application Information

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IPC IPC(8): H04B1/7097H04B1/715
CPCH04B1/7097H04B1/715H04B2001/7152
Inventor 余少波张德鑫徐镜媛
Owner 成都米风感知科技有限公司