我们使用无线移动电话时常碰到通话质量不好、干扰大、杂音大、还有明显的可懂串音等现象，这其中的原因很多，现在谈谈调制频偏超标对相邻信道的干扰问题。根据问际电工委员会EIA／IS－19－13规定，使用地球空间的无线电频率有详细的划分，我国模拟无线通信执行了国际标准900M We often encounter wireless mobile phone call quality is poor, interference, loud noise, as well as obvious crosstalk and other phenomena, which for many reasons, and now talk about modulation frequency offset exceeded the adjacent channel interference . According to the International Electrotechnical Commission EIA / IS-19-13 provides that the use of the earth’s radio frequency has a detailed division, China’s implementation of the analog wireless communication standard 900M