| 摘要 |
PURPOSE:To suppress the increase in the processing quantity by deciding an identification point of a reception signal with high accuracy when noise, frequency offset and fading are in existence and adding power of only samples whose identification point is roughly estimated through synchronization. CONSTITUTION:Data A/D-converted by A/D converters 17, 18 at a clock whose frequency is an integral number of multiple of a symbol clock are received by a memory 21. A UW detection circuit 32 detects a symbol string from phase information of received data and estimates a frame position to roughly estimate an identification position and to obtain power of the identification position roughly estimated in the reception data stored in the memory 21. The position of the identification point is detected from maximum power resulting from adding synchronizingly power of the reception signals for each sample number the same as number of the A/D converters 17, 18 (N samples) to reduce the processing quantity of identification point detection. |
