| 摘要: |
| 直接序列扩频接收机对本地载波的同步要求非常严格, 以往所需电路复杂。本文方法在数字域通过粗、细双环调整达到载波同步,具有同步时间短、精度高、灵活性强、所需器件少、易于实现的优点。本方法已在基于AD6620数字下变频信号处理器的中频数字直扩接收机中得到应用,并可广泛用于数字化扩频电台、遥控遥测等通信系统中。 |
| 关键词: 直接序列扩频通信 接收机 软件无线电 数字下变频 锁相环 |
| DOI：10.3969/j.issn.1001-893X. |
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| 基金项目: |
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| Local Carrier''''s Recovery in Intermediate Frequency Digitization Direct Sequence Spread Spectrum Receivers Based on AD6620 |
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| Abstract: |
| A direct sequence spread spectrum (DSSS)receiver has strict requirement on local carrier's synchronization, and always needs complex circuits. The solution in this paper can get it by using rude loop and accurate loop in digital field, and has the advantages of shoot synchronization time, high precision, high agility, less devices need and easy to be realized. The solution has been used in Intermediate Frequency (IF) digitization direct sequence spread spectrum receivers based on AD6620, and can be widely used in digitized spread spectrum receivers and telecontrol systems or remote sensing systems. |
| Key words: Direct sequence spread spectrum (DSSS) communication,Receiver,Software radio,DDC Phase lock loop |
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