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1. 发明申请

WO2010011863A1 APPARATUS AND METHODS FOR COMPUTING CONSTANT AMPLITUDE ZERO AUTO-CORRELATION SEQUENCES 审中-公开
标题翻译：用于计算恒定幅度零自动相关序列的装置和方法
公开(公告)号：WO2010011863A1
公开(公告)日：2010-01-28
申请号：PCT/US2009/051582
申请日：2009-07-23
申请人： QUALCOMM INCORPORATED , MANSOUR, Mohammad, M. , LONCKE, Vincent
发明人： MANSOUR, Mohammad, M. , LONCKE, Vincent
IPC分类号： G06F7/48 , H04W74/08 , H04L5/00 , H04J11/00
CPC分类号： H04J11/00 , H04J13/0062
摘要： Apparatus and methods for calculating constant amplitude zero auto-correlation sequences are disclosed. One method includes calculating an argument of trigonometric functions used for calculating a constant amplitude zero auto-correlation sequence based at least on additive recursion of an input sequence root constant and without multiplication by a variable. A constant amplitude zero auto-correlation sequence is then computed using a CORDIC algorithm configured to calculate trigonometric functions used in determining the sequence without performing multiplication operations and based on the calculated argument. The disclosed methods and apparatus may be applied, in particular, to efficiently computing Zadoff-Chu sequences in preamble detection in particular physical random access channels in Long Term Evolution LTE communication systems. By allowing computation of such sequences, memory requirements can be reduced.
摘要翻译：公开了用于计算恒幅零自相关序列的装置和方法。一种方法包括计算用于计算恒幅零自相关序列的三角函数的参数，所述恒定幅度零自相关序列至少基于输入序列根常数的加性递归而不乘以变量。然后使用CORDIC算法来计算恒幅零自相关序列，CORDIC算法被配置为计算用于确定序列的三角函数，而不执行乘法运算并且基于所计算的参数。所公开的方法和装置可以特别地应用于在长期演进LTE通信系统中的前同步码检测，特别是物理随机接入信道中有效地计算Zadoff-Chu序列。通过允许这样的序列的计算，可以减少存储器要求。

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