Anti-interference performance optimization of Zigbee system from shaping filter

Now, for Zigbee having many advantages, it can be used in more and more Machine to Machine or Man (M2M) technologies. Zigbee system has two mainly interference. One is inter symbol interference (ISI) that comes from other symbols of the same signal. Another is Co-channel interference (CCI) that comes from other techniques. Communication system mainly performance indexes are validity and reliability. In order to improve Zigbee system reliability, it is important to improve ability of anti-CCI and eliminate ISI with little or no validity reduced. In digital communication system, bit error rate (BER) is used to measure reliability, and data rate, spectrum availability radio are used to measure validity. The paper analyses Zigbee BER compositions under the influence of CCI and ISI. Results show that BER is related to the function of shaper (shaper, shaping filter). Later we propose that in order to reduce BER, using Raised Cosine Shaping Filter (RC) replaced Half Sine Wave Shaping filter (HSW). The reasons are RC having better characteristics in anti-CCI and eliminate ISI, and it will not change Zigbee advantages. The system simulation results prove it.