New ACMS selecting criterion in ALC-OFDM system

JIN Yong; CHU Zhen-yong; DA Xin-yu

doi:10.13873/J.1000-9787(2016)12-0048-04

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New ACMS selecting criterion in ALC-OFDM system

更新时间：2025-09-11

- New ACMS selecting criterion in ALC-OFDM system
- Vol. 35, Issue 12, Pages: 48-51(2016)
- 作者机构：
  
  空军工程大学信息与导航学院
- 作者简介：
- 基金信息：
- DOI：10.13873/J.1000-9787(2016)12-0048-04
  CLC： TN927.2;TN911.22
- Published：2016
- 稿件说明：
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[1]金勇,褚振勇,达新宇.ALC-OFDM系统中的ACMS新选择准则[J].传感器与微系统,2016,35(12):48-51.

JIN Yong, CHU Zhen-yong, DA Xin-yu. New ACMS selecting criterion in ALC-OFDM system[J]. 2016, 35(12): 48-51.
[1]金勇,褚振勇,达新宇.ALC-OFDM系统中的ACMS新选择准则[J].传感器与微系统,2016,35(12):48-51. DOI： 10.13873/J.1000-9787(2016)12-0048-04.

JIN Yong, CHU Zhen-yong, DA Xin-yu. New ACMS selecting criterion in ALC-OFDM system[J]. 2016, 35(12): 48-51. DOI： 10.13873/J.1000-9787(2016)12-0048-04.

摘要

针对新一代宽带卫星通信

建立了自适应低密度奇偶校验码（LDPC）编译码的正交频分复用（ALC-OFDM）传输系统结构与信道模型。在分析固定编码调制方式基础上

提出了一种加权信噪比（SNR）的自适应编码调制方案（ACMS）选择新准则

使每种编码调制方案对应着一个信道平均信噪比范围

可以有效找出使系统吞吐量最优的信噪比切换门限值。仿真结果表明:在系统的误比特率（BER）满足要求的情况下

对比各种加权准则

加权得到的SNR越大

采用该准则的系统吞吐量越大;当系统吞吐量都达到最大值时

采用3种加权方式的信噪比切换门限比传统准则至少降低了2 d B。

Abstract

For a new generation broadband satellite communication

framework and channel model of low density parity check（ LDPC） coded adaptive coding and modulation-orthogonal frequency division multiplexing（ ALCOFDM） system are established. On the basis of analyzing fixed coding and modulation mode

a new adaptive coding and modulation scheme（ ACMS） selecting criterion which adopts weighted signal-to-noise-ratio（ SNR） is proposed

where each coding and modulation scheme is assigned with a certain range of average channel SNR and the SNR switching thresholds for throughput maximization of the system are derived effectively. Simulation results shows that the throughput of the system will raise along with weighted SNR comparing all weighted criterion on the condition that the bit error rate（ BER） of the system meets the requirement and when the greater the SNR obtained by weighting is

the greater the throughput of the system is

the SNR switching thresholds adopts three kinds of weighted methods

reduce more than 2 d B compared to adopting traditional criterion.

关键词

Keywords

references

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一种卫星突发通信中抗相位模糊LDPC译码算法 [J]. 田进,王毓琀,马正新. 传感器与微系统 . 2012(12)

基于BP神经网络的数字调制识别方法 [J]. 余嘉,陈印. 传感器与微系统 . 2012(05)

LDPC编码AMC-OFDM系统中的两种MCS选择准则 [J]. 周明宇,李立华,路维佳,陶小峰,张平. 电子与信息学报 . 2008(07)

多径瑞利衰落信道下OFDM系统仿真 [J]. 孔令红,都思丹. 计算机仿真 . 2008(07)

OFDM系统抗多径衰落性能及仿真分析 [J]. 郭攀,李征. 计算机仿真 . 2007(11)

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