| 摘要 |
<p>The present invention provides a method and apparatus for detecting original frame boundary based on a LAS-CDMA system, by LS match filter, extracting mode and square for the input baseband signals, then the signals are divided into two routes; delaying and LA matching one of the said two routes signals, performing the energy mergence of LS symbols; making a correlation lobes detection for the other signal of the said two routes signals, detecting if a possible down-link synchronistic physical channel exists or not on the time delay; after the correlation lobes detection, exporting multiplex signals or one route signal, which are respectively the correlation lobes detection values exported below different thresholds; multiplying the output signal after LA match with the output multiplex signal respectively after the correlation lobes detection, when only a route signal is exported from the correlation lobes detector, it is necessary that only this signal is multiplied with the output signal after LA match, and making a frame boundary detection for the multiplied signal, obtaining the original frame boundary output. So the performance of the original frame boundary detection can be improved.</p> |
