公开(公告)号：US6108517A

公开(公告)日：2000-08-22

申请号：US901694

申请日：1997-07-28

申请人： Huseyin Arslan ,  Someshwar C. Gupta ,  Gregory E. Bottomley ,  Sandeep Chennakeshu

发明人： Huseyin Arslan ,  Someshwar C. Gupta ,  Gregory E. Bottomley ,  Sandeep Chennakeshu

IPC分类号： H04J1/12 ,  H04B1/10 ,  H04B7/26 ,  H04L25/02 ,  H04L25/03 ,  H04Q7/36 ,  H04B7/10

CPC分类号： H04L25/03331 ,  H04L25/0204

摘要： Methods and apparatus for receiving adjacent channel signals wherein adjacent channel interference effects are minimized through joint demodulation of the adjacent channel signals. A channel associated with each signal and each corresponding frequency band is estimated and used to form joint branch metrics for joint sequence estimation. In an exemplary embodiment, a baseband processor receives baseband samples corresponding to at least one carrier frequency, and then jointly demodulates at least two information streams corresponding to different carrier frequencies in dependence upon the received baseband samples. In another embodiment, a joint channel estimator receives at least two baseband sample streams, each stream corresponding to a different frequency band, and jointly estimates medium responses for each of at least two information signals which were transmitted in different frequency bands.

摘要翻译： 用于接收相邻信道信号的方法和装置，其中相邻信道干扰效应通过相邻信道信号的联合解调被最小化。 与每个信号和每个对应的频带相关联的信道被估计并用于形成用于联合序列估计的联合分支度量。 在示例性实施例中，基带处理器接收对应于至少一个载波频率的基带采样，然后根据所接收的基带采样，共同解调对应于不同载波频率的至少两个信息流。 在另一个实施例中，联合信道估计器接收对应于不同频带的每个流的至少两个基带采样流，并联合估计在不同频带中发送的至少两个信息信号中的每一个的媒体响应。

公开(公告)号：US06574270B1

公开(公告)日：2003-06-03

申请号：US09364169

申请日：1999-07-30

申请人： Mohamed F. Madkour ,  Someshwar C. Gupta ,  Yi Pin Eric Wang

发明人： Mohamed F. Madkour ,  Someshwar C. Gupta ,  Yi Pin Eric Wang

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。