| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily configure a transmitter even when the number of users to receive a transmission signal is increased by decreasing a scale of a circuit part depending on an antenna unit and extending a spread multiplex synthesis circuit. SOLUTION: The CDMA(code division multiple access) base station transmitter is provided with a spread multiplex synthesis section 1 that applies spread multiple processing to transmission data of a user designated from transmission data of a plurality of users and a spread multiplex synthesis section 2 that is newly extended when the number of transmission data is increased and applies spread multiplex processing to transmission data of a user designated from transmission data of a plurality of users. The spread multiplex synthesis section 1 is provided with a multiplex synthesis section 14, which sums spread multiplex data of the spread multiplex synthesis section 1 and the spread multiplex data of the spread multiplex synthesis section 2, D/A-converts the summed spread multiplex data, modulates the data to have a radio frequency band and the resulting data are transmitted from an antenna.</p> |
