公开(公告)号：US20050202795A1

公开(公告)日：2005-09-15

申请号：US10422321

申请日：2003-04-24

申请人： YaFei Tian ,  Chenyang Yang ,  Feng Wu ,  Liang Zhang ,  Liang Li ,  Noi Banavong

发明人： YaFei Tian ,  Chenyang Yang ,  Feng Wu ,  Liang Zhang ,  Liang Li ,  Noi Banavong

IPC分类号： H04L27/00 ,  H04B1/16 ,  H04B1/06 ,  H04B7/00

CPC分类号： H04L27/00 ,  H04W4/18 ,  H04W56/00 ,  H04W88/06

摘要： A baseband process operating on a receiver in a communication system, such as an 802.15.4 communication system, is provided. The baseband process has a set of predefined reference signals, with each reference signal associated with a possible characteristic in the baseband signal. The baseband process receives a degraded baseband signal, and preprocesses the baseband signal to reduce or remove the effects of the degradation. The preprocessed baseband signal is correlated with reference signals from the set of predefined reference signals, and the reference signal with the best correlation is identified. By identifying the best correlating reference signal, the baseband process is able to identify a characteristic of the baseband signal. In one example of the baseband process, the baseband signal is preprocessed by auto-correlating the degraded baseband signal with a delayed version of the degraded baseband signal. The preprocessed baseband signal is then correlated against a set of sync reference signals to find a sync offset for the baseband signal. When synchronized with the baseband signal, the baseband process may be correlated against a set of symbol reference signals to decode sequential symbols in the baseband signal.

摘要翻译： 提供了在诸如802.15.4通信系统的通信系统中的接收机上操作的基带处理。 基带处理具有一组预定义的参考信号，每个参考信号与基带信号中的可能特性相关联。 基带处理接收降级的基带信号，并预处理基带信号以减少或消除降级的影响。 预处理的基带信号与来自预定参考信号的参考信号相关，并且识别具有最佳相关性的参考信号。 通过识别最佳相关参考信号，基带处理能够识别基带信号的特性。 在基带处理的一个示例中，通过将劣化的基带信号与降级的基带信号的延迟版本自相关来对基带信号进行预处理。 然后将预处理的基带信号与一组同步参考信号相关，以找到基带信号的同步偏移。 当与基带信号同步时，基带处理可以与一组符号参考信号相关，以对基带信号中的顺序符号进行解码。