利用采样点选择法实现DS-CDMA中频接收机的码片同步

在ＤＳ－ＣＤＭＡ接收机中，正确解调的首要条件是实现本地扩频码与发送扩频码的码片同步。本文根据全数字接收机的实现方式和扩频解调的特点，提出了一种新颖的码片同步方式一采样点选择法。文中大致介绍了ＤＳ－ＣＤＭＡ全数字中频接收机的结构，重点讨论了利用采样点选择法实现码片同步的可行性，采样点选择法的性能。

Chip Timing Synchronization in DS-CDMA IF Receiver by Selecting Samples

Chip timing synchronization between local spread sequence and transmitted spread sequence is critical.in DS-CDMA receiver. Based on typical full-digital IF (intermediate frequency) receiver architecture and the characteristic of spread spectrum demodulation, a novel chip timing synchronization method, named sample selecting scheme, is proposed. After introducing the architecture of full- digital IF DS-CDMA receivers, the scheme is elucidated. The possibility of getting chip timing synchronized and the performance is also discussed in detail. Following the presented implementation approach, computer simulation has been successfully completed to verify the scheme proposed.