Method for automatically searching best frequency modulation transmission frequency point
An automatic search and frequency point technology, applied in transmission systems, electrical components, etc., can solve problems such as user inconvenience, driver distraction, and hidden dangers of driving safety, and achieve the effect of ensuring driving safety
Active Publication Date: 2012-01-11
NETAK TECH KO LTD
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Problems solved by technology
Although the existing technology automatically searches out all the space frequency points, the optimization of these space frequency points is not automated. Generally, the user needs to use the receiving device to judge the degree of interference of the signal, thus causing great harm to the users of such devices. major inconvenience;
[0004] 2. For in-vehicle media players, the above defects will distract the driver and become a great hidden danger to driving safety
Method used
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[0019] Further details will be given below in conjunction with the embodiments shown in the accompanying drawings.
[0020] The present invention relates to a method for automatically searching for the best frequency point for FM transmission, based on a device consisting of a main controller, a FM transmitting module, a FM receiving module, a memory, a liquid crystal display, a keyboard and a power supply module, in particular, the method Including the following steps:
[0021] A. The user selects an automatic search mode through the keyboard according to the prompt on the liquid crystal display screen, including automatic search for the minimum interference signal strength frequency point mode and automatic search for the widest frequency point mode of the free frequency band;
[0022] B. From the lowest frequency point of the broadcast FM frequency band to the end of the highest frequency point of the frequency band, the signal strength of the detection frequency point is t...
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This invention relates to a method for automatically searching for and modulating the optimum emission frequency point based on a device including a PCU, a frequency modulation emission module, a frequency modulation receiving module, a storage, a LCD, a keyboard and a supply module, and the method includes: a user selects an automatic searching mode via the keyboard according to the prompt on the LCD including a mode of searching automatically for frequency points of the least interference signal intensity and a mode of automatically searching for the broadest frequency points of idle bands and gets signal intensity of test frequency points spaced in a fixed band width from the lowest point to the highest one of a broadcast FM band, and said PCU sets the optimum point searched by the selective mode the emission frequency point of the FM emission module, which realizes automatic selection of empty frequency points in the FM band.
Description
technical field [0001] The invention relates to a method for FM transmission and reception, in particular to a method for automatically controlling FM transmission to select the best frequency point in a broadcast FM frequency band. Background technique [0002] Devices that provide both FM reception and transmission are now very common, such as car media players. This type of device finds the ideal FM space frequency point through the FM receiving part, and uses the space frequency point as the transmission frequency of the FM transmitting part to play out media signals such as audio, video or video and audio. Users who need to receive can receive the audio, video or audio-visual signal by adjusting their FM receiving device to the corresponding frequency. In the prior art, the controller and related components are used to automatically search for FM space frequency points, and then manually set one of the space frequency points as the transmission frequency of the FM tran...
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IPC IPC(8): H04B1/38H04B1/40
Inventor 周创世刘一宁
Owner NETAK TECH KO LTD