CAJ | 학술논문

针对传统的GSM接收机一般采用二次变频超外差方案或一次变频的低中频方案，提出了一种基于零中频的实现方案，它采用一片AD公司的高性能下变频芯片ADRF6801，配以简单的前级放大和滤波电路，电路简洁，可以实现较好的性能指标，满足产品小型化、低功耗的要求。实际测试表明，采用该方案实现的接收机噪声系数低，灵敏度高，可应用于GSM接收的各种场合。
침대전통적GSM접수궤일반채용이차변빈초외차방안혹일차변빈적저중빈방안，제출료일충기우령중빈적실현방안，타채용일편AD공사적고성능하변빈심편ADRF6801，배이간단적전급방대화려파전로，전로간길，가이실현교호적성능지표，만족산품소형화、저공모적요구。실제측시표명，채용해방안실현적접수궤조성계수저，령민도고，가응용우GSM접수적각충장합。
Traditional GSM receiver is twice conversions superheterodyne structure or single conversion superhetero -dyne structure ,which is complicated ,expensive ,and difficult to be integrated.A scheme for GSM receiver based on ZIF (Zero IF ) is proposed , which is composed of a downconverter made by ADI company ,front amplifiers and filters ,can achieve high performance ,meets the demands of lower power consumption ,miniaturization.Actual test shows that GSM receiver adopted ZIF scheme has the characteristics of lower Noise figure and high Sensitivity.This ZIF scheme can be applied to all kinds of GSM receiver.