The Design And Realization Of Wireless Conference System Based On NRF24E1

The existing wireless conference systems are mainly infrared wireless conference systems,which are not only blocked easily by the obstacle, but also inconvenient to be installed and debugged, so it is necessary to design a wireless conference system which is mobile and does not need to be installed and debugged. It will be fast and convenient to be laid in addition to complete functions and promising market.The purpose of this paper is to design a kind of low-cost, low-power, portable, easy-to-use and expansible wireless conference system. It is suitable for small and medium-sized meetings and temporary meetings. It can be applied to report mode, discussion mode and so on. In addition, it has an electronic voting function and a simultaneous interpretation cell to apply to small and medium-sized international conference.The audio data of this system adopts 8 KHz sampling mode, PCM coding mode and GFSK modulation. Moreover, the system adopts the unlicensed ISM band at 2.4GHz and digital transmission mode; therefore it has the greatly improved anti-jamming capability.This system is based on the 2.4GHz RF transceiver with embedded 8051 compatible micro-controller which is produced by NODIC Corporation. According to the requirement of the conference system,it expands the audio input and output circuit, the antenna, EEPROM, the keystoke and the LCD display module. In addition, it designs the hardware architecture of chairman cell, representative cell, interpreter cell and listening cell separately.This system uses C language for programming, and it designs the communication protocols under the characteristic of ShockBurstTM to let the Chairman control the representative effectively. According to the actual situation of the conference, it designs the Chairman monopoly speak mode, voting mode, application designation mode and the free discussion mode which add up to five modes to meet the basic requirement of various meetings.It has been proved that the design of the wireless conference system has rational hardware circuit structure, good maneuverability and upgradeability. Also, it has good audio transmission effect, wide range of applications and is in accord with the basic design requirements, so it will have a promising market.