| 低轨道移动卫星通信DS/CDMA误码性能分析 |
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| 引用本文： | 高电波,范俊辉,魏迎春.低轨道移动卫星通信DS/CDMA误码性能分析[J].吉林大学学报(信息科学版),2003,21(1):31-34. |
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| 作者姓名： | 高电波 范俊辉 魏迎春 |
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| 作者单位： | 吉林大学,通信工程学院,吉林,长春,130012 |
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| 基金项目： | 国家自然科学基金资助项目(60172046) |
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| 摘 要： | 讨论了非静止轨道移动卫星通信中DS／CDMA(直接序列扩频码分多址)QPSK(Quaternary Phase Shift Keying)调制的误码性能。以莱斯衰落信道为基础，考虑卫星覆盖仰角对误码率的影响，推导了误码率的解析表达式。给出了计算机仿真数值曲线，并对仿真结果进行了讨论。通过在相同误码率以及不同仰角情况下扩频调制同窄带QPSIK调制信噪比恶化量的比较，可以看出扩频调制对误码性能有很大的改善。得出的结论对进一步评价系统的分组错误概率、吞吐量以及抗衰落技术的选择具有重要的意义。
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| 关 键 词： | 移动卫星通信 DS／CDMA 误码性能 直接序列扩频码分多址 扩频调制 窄带QPSK调制 信道模型 |
| 文章编号： | 1671-5896(2003)01-0031-05 |
| 修稿时间： | 2002年9月16日 |
DS/CDMA bit error performance analysis for low earth-orbiting mobile satellite communication systems |
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| GAO Dian\|bo,FAN Jun\|hui,WEI Ying\|chun.DS/CDMA bit error performance analysis for low earth-orbiting mobile satellite communication systems[J].Journal of Jilin University:Information Sci Ed,2003,21(1):31-34. |
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| Authors: | GAO Dian\|bo FAN Jun\|hui WEI Ying\|chun |
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| Abstract: | The DS/CDMA bit error performance of QPSK(Quaternary Phase Shift Keying) modulation of non\|static earth orbiting mobile satellite communication is discussed. Based on Rice fading channel, and taking the effect of bit error rate of the angle of elevation of satellite coverage into account, A bit error rate formula and computer simulation figures are given. In addition, the simulation results are analyzed. Through the comparison of signal to noise ratio aggravation at same bit error rate and variant angle of elevation, it is clear that the bit error performance of spread spectrum modulation is highly improved. This analysis result is significant for the further estimation of group error rate, throughput of the satellite communication system, and the option of anti\|fade technology. |
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| Keywords: | Mobile satellite communication Bit error rate Channel model |
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