| 摘要 |
A spreading-code synchronization detection method for a spectrum spreading signal, which increases the sensitivity of spreading-code synchronization detection. In this method, spreading-code synchronization detection is applied to a spectrum spreading signal obtained by spectrum-spreading data having a bit transition period equal to a multiple of one period of a spreading code with the spreading code. A process for obtaining a liner-addition correlation-calculation result equal to a value obtained by linear additions of the results of correlation calculations between the spectrum spreading signal and the spreading code is performed every unit period which is a multiple of one period of the spreading code and shorter than the bit transition period. The absolute value of the liner-addition correlation-calculation result obtained every unit period is calculated. The absolute value of the liner-addition correlation-calculation result obtained every unit period is added for a plurality of unit periods. A correlation point is detected from a value obtained by adding the absolute values. <IMAGE> |
