SIGNAL TRANSMITTER AND RECEIVER
合集下载
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
专利内容由知识产权出版ቤተ መጻሕፍቲ ባይዱ提供
专利名称：SIGNAL TRANSMITTER AND RECEIVER 发明人：HASEGAWA TOSHIO 申请号：J P 154 25382 申请日：19820903 公开号：J P S594 3658A 公开日：1984 0310
摘要：PURPOSE:To reduce the effect on a interference wave in a band, by frequencyconverting a modulated carrier wave in response to the content of transmission information and transmitting it, and bringing the transmission band into a wide band. CONSTITUTION:Digital information outputted from an information signal source 1 is frequency-modulated at a modulator 2 in the transmission of train control information. The modulated carrier wave output is frequency-converted with an oscillating frequency of a local oscillator 6 at a frequency converter 7 and applied to a track. Since the changing pattern of the frequency is determined for the oscollating frequency of the oscillator 6 in response to an information signal, the frequency of the transmitted output is changed at all times and the transmission energy is spread into a wide band. The frequency converting signal transmitted via the track is received at a coupler 3 and the output is inputted to a demodulator 4 by being frequency-converted 9 with a local oscillator 8 having the similar frequency changing pattern as that at the transmission side. Thus, the energy of the input signal of the demodulator 4 is narrowed in band for attaining demodulation detection and the energy is applied for the train control.
申请人：MITSUBISHI DENKI KK
更多信息请下载全文后查看
专利名称：SIGNAL TRANSMITTER AND RECEIVER 发明人：HASEGAWA TOSHIO 申请号：J P 154 25382 申请日：19820903 公开号：J P S594 3658A 公开日：1984 0310
摘要：PURPOSE:To reduce the effect on a interference wave in a band, by frequencyconverting a modulated carrier wave in response to the content of transmission information and transmitting it, and bringing the transmission band into a wide band. CONSTITUTION:Digital information outputted from an information signal source 1 is frequency-modulated at a modulator 2 in the transmission of train control information. The modulated carrier wave output is frequency-converted with an oscillating frequency of a local oscillator 6 at a frequency converter 7 and applied to a track. Since the changing pattern of the frequency is determined for the oscollating frequency of the oscillator 6 in response to an information signal, the frequency of the transmitted output is changed at all times and the transmission energy is spread into a wide band. The frequency converting signal transmitted via the track is received at a coupler 3 and the output is inputted to a demodulator 4 by being frequency-converted 9 with a local oscillator 8 having the similar frequency changing pattern as that at the transmission side. Thus, the energy of the input signal of the demodulator 4 is narrowed in band for attaining demodulation detection and the energy is applied for the train control.
申请人：MITSUBISHI DENKI KK
更多信息请下载全文后查看