Digit frequency modulation (FM) antenna system

Abstract

The invention provides a digital FM antenna system which comprises an analog-to-digital converter (ADC), a digital signal processor (DSP), a direct digital frequency synthesizer (DDS), a DA conversion and modulation module, a filtering and power amplification module, a function module and an array antenna, and the function module includes a man-machine interaction interface, comprises a camera, a microphone and a loudspeaker, and has functions including liquid crystal display, audio input and output and video sending. Thus, the digital FM antenna system can ensure the index consistency and stability of technologies by utilizing software uniformity and non-deformation of digital processing technology, and the array antenna is used to solve the problem that a traditional antenna needs to consider the antenna directivity during signal receiving and sending.

Description

technical field [0001] The invention relates to the technical field of frequency modulation antennas, in particular to a digital frequency modulation antenna system. Background technique [0002] In recent years, with the rapid development of communication technology, the ability to receive and send multi-band radio signals has become an essential function of wireless communication devices. However, wireless communication standards and communication frequency bands used in different parts of the world are not the same, so most current communication devices use broadband antennas or multiple antennas with different frequency bands to receive and send radio signals in different frequency bands. However, there is a problem in both methods: during the transmission of analog signals, distortion and attenuation will always occur due to noise interference and energy loss, so the transmission of analog signals requires an amplifier to amplify the signal strength at each distance. ,...

AI Technical Summary

Problems solved by technology

However, there is a problem in both methods: during the transmission of analog signals, distortion and attenuation will always occur due to noise interference and energy loss, so the transmission of analog signals requires an amplifier to amplify the signal strength at each distance. , while amplifying the signal strength, the signal distortion caused by noise is also amplified

When the transmission distance increases, the series connection of multi-stage amplifiers will cause the superposition of distortion, so that the distortion of the signal will become larger and larger.

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