Abstract:

A wireless communications technology program based on IEEE802.15.4 is proposed.A low-power chip CC2420 which conforms with ZigBee specification developed by Chipcon Enterprise is used in this program.This paper briefly introduces the architecture of wireless voice communication and a design of wireless system which uses MSP430 microcontroller and CC2420 RF transceiver.A good short-range wireless transmission and PWM output are achieved by using small external components;the effectiveness of wireless transmission is tested by sine wave.The results show that this program has the advantages of low cost and better sound quality.

Key words: IEEE802.15.4;Zigbee;wireless voice communications;two-way transmission