ABSTRACT: With the development of the information industry, the wireless communication plays a more and more important role in people’s daily life and its proportion in the whole data transmission field is larger and larger. Wireless transmission system with high speed, wide band, small retardance receives people's favor day by day and the requirements of its agility are becoming more and more. The traditional data transmission way is wired transmission mode. The wired transmission mode is not only limited in using the equipment but also in the fixed scope, and sometimes the cost is too high for people to accept. Moreover in some special situations, like in the transport means, in the motion work, the museum and so on, does not suitable for the wiring the situation, then the wireless data transmission turned to be the best choice.
First of all, we have put forward the overall block-diagram designed and realized the design of each part on this basis. We used FSK figure modulate system in the Launching module and adopt 73M223 FSK figure to modulate the demodulation chip, varied the digital signal into the suitable analog signal and then transmitted them to the sky after mixing. In the receive module, we mixed the electric circuit and the demodulation electric circuit together effectively and reduced the electric circuit volume. We applied MC13135 to design and realized concrete electric circuit, resorted better receiving data wave. Then we tested the error rate of the receiving and launching system and the measurement result met our requirements. Finally, we tested the error rate of the launching system, the emissive power, the transmitting range, and also the results were satisfied.
This article designs the wireless data transmission modular and its structure is compact. It makes every effort to make the transmission efficiency and cost lower at the same time. So it has a very good application prospect.
