公开(公告)号：EP0872016A4

公开(公告)日：2003-04-23

申请号：EP96930486

申请日：1996-06-06

申请人： AXONN L L C

发明人： SANDERFORD H BRITTON JR ,  ROUQUETTE ROBERT E ,  DAVIS ROBERT J

IPC分类号： H04B1/707 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/708 ,  H04B1/7097 ,  H04B1/71 ,  H04B1/74 ,  H04J13/04 ,  H04L7/10 ,  H04L27/06

CPC分类号： H04B1/70752 ,  H04B1/707 ,  H04B1/70755 ,  H04B1/70775 ,  H04B1/708 ,  H04B1/7097 ,  H04B1/7101

摘要： A parallel frequency acquisition technique is disclosed for increasing receiver sensitivity and increasing process gain while reducing the necessary preamble duration required for spread spectrum acquisition. In addition, techniques are disclosed for reducing the effects of jamming and impulse noise on the performance of the receiver as well as enhanced antenna diversity approaches. Further, techniques are taught which compensate for chip code alignment drift, providing an associated transmitter maintains carrier and chip code coherence. These techniques allow for the use of lower cost frequency setting crystals in both the receiver and transmitter as well as the operation of the system over a wider temperature range.

摘要翻译： 公开了一种并行频率获取技术，用于增加接收器灵敏度并增加过程增益，同时减少扩频采集所需的前导码持续时间。 另外，公开了用于降低干扰和脉冲噪声对接收机性能的影响以及增强的天线分集方法的技术。 此外，教授了补偿码片对准漂移的技术，提供了相关联的发射器，以维持载波和码片的一致性。 这些技术允许在接收器和发射器中使用较低成本的频率设定晶体以及在较宽温度范围内操作系统。