| 摘要: |
| 由于大气中的雷电脉冲噪声的严重影响，当传送可靠性要求极高的数据信息时，现行甚低频通信系统难以满足要求。为了有效克服大气噪声的影响，提高甚低频通信系统的可靠性，在考虑了便于系统升级改造等因素的基础上，提出了一种适用于甚低频数据通信传输的差错控制方案。该方案采用级联码和信道交织技术，级联码内码仍用原系统的BCH(Bose-Chaudhuri-Hocquenghem)码，外码选择RS(Reed-Solomon)码，内、外码之间插入了块交织形式的交织器。为了验证方案的纠错性能，给出了基于该方案的甚低频通信系统计算机仿真方案和仿真结果。结果表明，该方案在编码增益、正确解码概率等方面具有较大优势，在系统升级改造上有一定的实用意义。 |
| 关键词: 甚低频通信 差错控制；交织技术；RS码；BCH码；级联码 |
| DOI： |
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| 基金项目: |
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| An error control scheme for VLF communication system and its performance simulation |
| LIU Cuihai,MA Wenjiao,MA Xin |
| () |
| Abstract: |
| Beacause of the great influence of the atmospheric noise which is primarily due to lightning impulses,the present Very Low Frequency（VLF）communication system is difficult to meet the requirements of transmitting accurate tactical message. In consideration of the upgrading of the system,an error control scheme is proposed for improving the reliability of VLF communication system and suppressing the noise impulses. This scheme uses concatenated coding with a Bose-Chaudhuri-Hocquenghem(BCH) inner code and a Reed-Solomon(RS) outer code combining with interleave technique. Computer simulation of the scheme is given and the result shows that it has great advantages on coding gain and correct decoding probability,and provides reference for the upgrading of the system. |
| Key words: VLF communication error control interleave technique RS code BCH code concatenated code |
