【摘要】 CDMA 技术作为成熟的商业化技术,已经得到了蓬勃发展和应用,并且将下一代无线通信技术中将占据主导地位。在 CDMA 系统(如 IS-95)下行链路中,系统对基站的 PN 导频相位偏移进行了规划分组,并对不同的导频组设置了不同的搜索窗口,大大加快了移动台捕获导频的速度。本文引进一种特殊的辅助序列,采用二进制相位搜索估计,可以事先对 PN 导频的初始相位进行精确的区间定位,然后配合导频组和搜索窗的优势,可以大大加快导频相位的捕获速度。更多还原

【Abstract】 CDMA as mature commercial technology has achieved great development. Also it will be dominant in next generation wireless communication systems. In the forward link of the CDMA system, such as IS-95, the PN pilot phase of the base station has been planed carefully, grouped into different pilot sets and the searching windows for different pilot sets are set separately. All these approaches can increase the speed of PN acquisition. In this paper, an auxiliary sequence is introduced. With the binary phase estimate strategy, the accurate phase area can be determined at the start. After that, with the advantages of the searching widows, the acquisition speed can be faster.更多还原