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| 指挥调度通信系统中的二/四线变换技术 | |
| 引用本文： | 陈演平. 指挥调度通信系统中的二/四线变换技术[J]. 交通部上海船舶运输科学研究所学报, 2000, 0(1) |
| 作者姓名： | 陈演平 |
| 作者单位： | 电子信息部 |
| 摘 要： | 对于指挥调度通信系统来说 ,其指挥、调度、会议等工作状态时的语音质量如何 ,在很大程度上取决于系统的二 /四线变换的效果。首先分析相位抵消式二 /四线变换技术的基本原理 ,接着推演设计了一种方法 ,并以此方法计算了线路阻抗与串音衰耗的关系 ,最后介绍了应用相位抵消式二 /四线变换技术的电路 ,结果表明 :应用该电路 ,将可以在更宽的负载和频率范围内实现自适应收发串音的抑制。 |
| 关 键 词： | 指挥调度通信 二/四线变换技术 相位抵消 线路阻抗 串音衰耗 |
2/ 4 Wire Conversion Technique in Command and Dispatch System |
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| CH EN Yan- ping. 2/ 4 Wire Conversion Technique in Command and Dispatch System[J]. , 2000, 0(1) | |
| Authors: | CH EN Yan- ping |
| Affiliation: | Electronic Information Division |
| Abstract: | For communication system of command and dispatch phonetic quality at working states such as command,dispatch and meeting etc. depends mainly on the effect of 2 /4 wire conversion in the system. The basic principle of 2 /4 wire conversion technique of phase can- cellation type is analyzed atfirstin the paper. Then,a method capable to give relation of cir- cuit resistance and crosstalk attenuation is deduced. The application of circuit with 2 /4 wire conversion technique of phase cancellation type is finally introduced. It is indicated that the suppression of self adaptive TR crosstalk will be carried out in a wider range of load and fre- quency by applying this circuit. |
| Keywords: | command and dispatch communication 2 /4 wire conversion technique phase cancellation circuit resistance crosstalk attenuation |
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