Fm demodulator for composite modulation system
专利汇可以提供Fm demodulator for composite modulation system专利检索，专利查询，专利分析的服务。并且PURPOSE:To extract only a monitoring control signal by processing a base band signal by using a local oscillator, whose frequency is nearly equal to an input signal frequency, for the phase detection of a signal which contains a PSK wave as a main signal and an FM-modulated wave as the monitoring control signal. CONSTITUTION:A signal containing an (n)-phase PSK wave as a main signal and an FM-modulated wave as a monitoring control signal is repeated on heterodyne basis by the microwave circuits 11a and 11b, and intermediate-frequency-wave circuits 12a and 12b of a main repeating station. A signal inputted to an FM demodulator 13 is detected by a carrier 90 deg. out of phase with the output of a local oscillator 19 having a frequency nearly equal to an input signal frequency. Then, it is inputted to a base band processing circuit 16 to be multiplied by two, and the resulting signal is added to the output of differentiation 17 at a section 18 to pass the sum through an LPF20, thus extracting the monitoring control signal. On the other hand, the monitoring signal component is eliminated by using an LPF21 to achieve the follow-up control of the oscillator 19, thereby obtaining a demodulator which eliminates the need for phase synchronization.，下面是Fm demodulator for composite modulation system专利的具体信息内容。
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 多用户识别模块设备及其操作方法 | 2020-05-08 | 936 |
| 毫米波通信测试系统 | 2020-05-08 | 96 |
| 多模式接收机星基增强技术装置及处理方法 | 2020-05-11 | 453 |
| 上行传输方法、计算机可读存储介质和分布式多天线系统 | 2020-05-08 | 110 |
| 卫星通信手持机中的频率校正方法及系统 | 2020-05-11 | 610 |
| 用于服务器虚拟化的计算资源的物理划分 | 2020-05-11 | 993 |
| 一种基于伪卫星的卫星地面站站间时延校准方法 | 2020-05-11 | 281 |
| 第五代(5G)新无线(NR)事物网络中的用户设备(UE)和副链路通信方法 | 2020-05-11 | 509 |
| 一种基于共享充换电柜的5G基站供电系统 | 2020-05-11 | 321 |
| 一种5G基站扩展延伸光分布系统 | 2020-05-11 | 862 |
高效检索全球专利专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。
我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。
专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。
