发明名称 |
Circuit for demodulating PSK modulated signal by differential-detection. |
摘要 |
<p>In a demodulator circuit which is simple in construction, a PSK modulated signal is converted in frequency into a quasi-base band signal and is then subjected to complex separation. Partly since a phase angle sampled from a digital complex signal is supplied to a differential-detector circuit, and partly since the differential-detector circuit processes only the phase angle, the differential-detector circuit has a simple construction. As the detected phase difference between two successive symbol data, an error between a carrier wave contained in the modulated signal and a locally oscillated frequency on the receiving side is compensated and is outputted as a digital demodulated signal. <IMAGE></p> |
申请公布号 |
EP0449146(A2) |
申请公布日期 |
1991.10.02 |
申请号 |
EP19910104572 |
申请日期 |
1991.03.22 |
申请人 |
JAPAN RADIO CO., LTD |
发明人 |
SHIMAKATA, YUKIHIRO, C/O JAPAN RADIO CO., LTD.;KUBO, KAZUTOSHI, C/O JAPAN RADIO CO., LTD. |
分类号 |
H04L27/22;H04L27/00;H04L27/233 |
主分类号 |
H04L27/22 |
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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