| 摘要 |
PURPOSE: A method for performing a wideband CDMA(Code Division Multiple Access) transmission using a frequency hopping method is provided to mix a CDMA system with the frequency hopping method, to maintain a processing gain, and to spread a transmission band. CONSTITUTION: The first mixer(23) multiplies a 9.6Khz baseband data signal(21) by a 1.23Mhz band PN(Pseudo Noise) code value(22), to perform the first band spreading. The second mixer(25) performs a frequency hopping for a signal spread through a multiplication of a next PN code value, to transmit the signal as a transmission frequency spread with wideband. When the wideband-spread signal is transmitted, the signal includes hopping-performed channel information and code information. |
