发明名称 |
UP-LINK SYSTEM IN DS/CDMA |
摘要 |
Disclosed is a link access apparatus of a CDMA system using a DS/SS communication method, and more particularly an up-link access apparatus which overcomes a near/far problem occurring when mobile stations and a base station perform multiple access communication using code division. An up-link access apparatus in a DS/SS-CDMA system has a transmitter for mixing data to be transmitted to a base station with a PN code unique to that mobile station to thereby PN code modulate the data. The transmitter then mixes the PN code modulated data with a carrier having a frequency that is shifted by an identification frequency to thereby output a spread spectrum signal. The apparatus further includes a receiver for mixing a demodulation carrier made up of the PN code and the identification frequency with the spread spectrum signal from the transmitter to thereby output a mixed signal. The mixed signal is then integrated according to a period having a reciprocal corresponding to the identification frequency, demodulated and output as a digital signal. |
申请公布号 |
KR100217715(B1) |
申请公布日期 |
1999.09.01 |
申请号 |
KR19930031814 |
申请日期 |
1993.12.31 |
申请人 |
SAMSUNG ELECTRONICS CO, LTD. |
发明人 |
KIM, JAE-WOO;PARK, JONG-HYUN |
分类号 |
H04B1/707;H04B7/216;H04B7/26;H04J13/10;H04W72/04;H04W76/02 |
主分类号 |
H04B1/707 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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