-
1.发明授权公开(公告)号：US06574270B1
公开(公告)日：2003-06-03
申请号：US09364169
申请日：1999-07-30
IPC分类号： H04B169
CPC分类号： H04B1/71072
摘要： Desired information is recovered from a communications signal that includes interference by processing the communications signal to produce a baseband signal and detecting a spreading sequence from the baseband signal. An estimate of an interfering signal component of the baseband signal associated with the detected spreading sequence is generated, and new version of the baseband signal is generated from a previous version of the baseband signal based on the generated estimate of the interfering signal component. The desired information is estimated from the new version of the baseband signal. The spreading sequence preferably is detected by resolving, e.g., descrambling, a version of the baseband signal into a plurality of signal components, respective ones of which are associated with respective propagation paths. The resolved plurality of signal components are correlated with a set of spreading sequences to generate respective sets of correlations for respective ones of the resolved signal components. The correlations are combined, preferably using maximal ratio combining (MRC) to generate a plurality of combined correlations, respective ones of which correspond to respective ones of the spreading sequences. The spreading sequence associated with the interfering signal component is detected from the generated combined correlations.
摘要翻译： 从包括干扰的通信信号中恢复期望的信息，处理通信信号以产生基带信号并从基带信号检测扩展序列。 产生与检测到的扩展序列相关联的基带信号的干扰信号分量的估计，并且基于所产生的干扰信号分量的估计，从基带信号的先前版本生成新版本的基带信号。 从新版本的基带信号估计所需的信息。 扩展序列优选地通过将基带信号的版本解析为多个信号分量来检测，其中各个信号分量与相应的传播路径相关联。 解析的多个信号分量与一组扩展序列相关，以产生相应的解析信号分量的相关集合。 相关性被组合，优选地使用最大比组合（MRC）来产生多个组合相关，其中各个相应于相应的扩展序列。 从所生成的组合相关性中检测与干扰信号分量相关联的扩展序列。
-
公开(公告)号：US07012977B2
公开(公告)日：2006-03-14
申请号：US09885804
申请日：2001-06-20
IPC分类号： H03D1/04
CPC分类号： H04B1/7107 , H04B1/71072 , H04B2201/70701
摘要： The present invention provides a system, method and apparatus for estimating channel parameters in spread spectrum communication systems. A first method is accomplished by receiving a base station signal and then demodulating the base station signal. After demodulating the base station signal, a maximum signal is selected from the base station signal. If the maximum signal is the common pilot channel, then the channel parameters are estimated directly from the common pilot channel. If the maximum signal is not the common pilot channel, then the demodulated base station signal is iteratively fed back for further demodulation and re-selection of the maximum signal until the maximum signal is the common pilot channel. A second method is accomplished by incorporating channel estimates made from the interfering signals in a constructive manner to the first method.
-
搜索结果
2 条记录 (耗时 0.018 秒)
