| 摘要: |
| 本文从短波模拟话音通信的实际情况出发,讨论了短波无中心组网中,实时选频和数字选址技术.提出了以绝对值信噪比(ASNR)代替常用信噪比进行信道评判的实时选频方案,和以双门限连续判决器及简易纠错码-(7,4)循环码的软件编译码,作为数字选址呼叫信可靠传输、识别手段的数字选址呼叫方案,并通过了实验验证. |
| 关键词: 短波通信,实时选频,数字选址呼叫 |
| DOI： |
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| 基金项目: |
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| Research and practics in short wave frequency selecting and address selecting call |
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| Abstract: |
| This paper discussed the techniques of real-time frequecy selecting and digital address selecting calling in short-wave no-centre trunking system. Based on the situation of analog communication, we used ASNR(Absolute Signal to Noice Ratio) to replace SNR(Signal to Noice Ratio) to estimate the quality of communcation, designed "two thresholds continuous comparator" in Company with using simple (7, 4) cyclic codes to make the data transmission more reliable. The system has been proved sucessfully by the experiments. |
| Key words: Short Wave Communication,Real-time Frequeney Selecting,Digital Address Selecting Call |
《电讯技术》编辑部 