专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2006039546A1 MULTICARRIER RECEIVERS AND METHODS FOR DETECTING CYCLIC PREFIXES HAVING 审中-公开
标题翻译：多媒体接收机和检测周期性前缀的方法
公开(公告)号：WO2006039546A1
公开(公告)日：2006-04-13
申请号：PCT/US2005/035287
申请日：2005-09-29
申请人： INTEL CORPORATION , QIU, Sigang , VUONG, Minh-Anh , SALVEKAR, Atul , QIAN, Xiaoshu
发明人： QIU, Sigang , VUONG, Minh-Anh , SALVEKAR, Atul , QIAN, Xiaoshu
IPC分类号： H04L27/26
CPC分类号： H04L27/2607 , H04L27/2666
摘要： A multicarrier receiver determines the length of a cycle prefix. The multicarrier receiver contains a cyclic prefix detector. The cyclic-prefix detector includes a matched filter to apply first reference data corresponding to a portion of a first training symbol to the sampled received multicarrier communication signal to generate a first detection output. A second reference data corresponding to a portion of a second training symbol is then applied to the sampled received multicarrier communication signal to generate second detection output. The cyclic prefix detector determines the length of a cyclic prefix by performing a modulo operation (eg. modulo by 64) on a number of time-domain samples from first detection output to second detection output. If the longest possible prefix is 64 samples long and the result of the modulo operation by 64 (i.e. the remainder when the number of samples between the two peaks is divided by 64) is zero, then the prefix is 64 samples long. If the result is 32, then the prefix is 32 samples long etc. The cyclic prefix detection circuitry verifies that the time instance of the second detection output is within a predetermined valid range prior to performance of the modulo operation to determine the length of the cyclic prefix. Cyclic-prefix detector may also generate frame-boundary and timing information.
摘要翻译：多载波接收机确定周期前缀的长度。多载波接收机包含循环前缀检测器。循环前缀检测器包括匹配滤波器，以将对应于第一训练符号的一部分的第一参考数据应用于采样的接收多载波通信信号，以产生第一检测输出。然后将对应于第二训练符号的一部分的第二参考数据应用于采样的接收多载波通信信号以产生第二检测输出。循环前缀检测器通过在从第一检测输出到第二检测输出的多个时域采样上执行模运算（例如，模64）来确定循环前缀的长度。如果最长可能的前缀是64个样本长，并且模运算的结果为64（即，当两个峰之间的采样数除以64时的余数）为零，则前缀是64个样本长。如果结果为32，则前缀为32个采样长等。循环前缀检测电路在执行模运算之前验证第二检测输出的时间实例是否在预定有效范围内，以确定循环字首。循环前缀检测器还可以生成帧边界和定时信息。

IPRDB

热门服务

关于我们

友情链接

联系方式