A METHOD OF DESPREADING A SPREAD SPECTRUM SIGNAL

专利名称：A METHOD OF DESPREADING A SPREAD

SPECTRUM SIGNAL

发明人：DOOLEY, Saul, R.,YULE, Andrew, T.申请号：EP01931642.1申请日：20010424公开号：EP1287624A1公开日：20030305

摘要：A method of despreading a target spread spectrum signal containing

pseudorandom noise (PRN) code sequences modulated by a data message is disclosed.The method comprises the steps of providing data message information relating to thetiming of an epoch of at least one data bit; and performing a correlation of the targetsignal and a replica signal containing corresponding PRN code sequences using the datamessage information to minimise degradation of the correlation caused by variations inthe PRN code sequences in the target signal attributable to modulation by the datamessage. The correlation may be timed so as to substantially avoid continuous

correlation over an epoch of a data bit. Alternatively, the data message information mayfurther comprise bit information wherein the correlation is modified as a function of thedata message information. In particular, where data bit modulation of the PRN codesequences in the target signal is the same as or equivalent to exclusive-or modulation,the polarity of PRN code sequences in the replica signal may be selectively reversed.

申请人：Koninklijke Philips Electronics N.V.

地址：Groenewoudseweg 1 5621 BA Eindhoven NL

国籍：NL

代理机构：White, Andrew G.

更多信息请下载全文后查看