发明名称 |
Demodulator for CDMA spread spectrum communication using multiple PN codes |
摘要 |
The demodulator has a plurality of matched filters in parallel. Each matched filter has a different binary PN code, a plurality of sample holders, a plurality of multipliers, an adder, and a controller. The sample holders has a common input, a switch, a first capacitor, a first inverse amplifier with an output and an input connected to the common input through the switch and the capacitor, and a first feedback capacitor for feeding the output of the first inverse amplifier back to the input. Each multiplier has a first and second sub-multiplexers, one of sub-multiplexer selecting corresponding sample holder output and another sub-multiplexer selecting a reference voltage. <IMAGE> |
申请公布号 |
EP0790712(A2) |
申请公布日期 |
1997.08.20 |
申请号 |
EP19970102710 |
申请日期 |
1997.02.19 |
申请人 |
YOZAN INC.;KOKUSAI ELECTRIC CO., LTD. |
发明人 |
ZHOU, CHANGMING;SHOU, GUOLIANG;ZHOU, XUPING;YAMAMOTO, MAKOTO;URABE, KENZO;TAKATORI, SUANO |
分类号 |
H04B1/707;H04B1/7093 |
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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