| 赵海军*,陈华月*,崔梦天**.基于HQAM和资源映射的UEP方案[J].高技术通讯(中文),2025,35(4):350~359 |
| 基于HQAM和资源映射的UEP方案 |
| UEP scheme based on HQAM and resource mapping |
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| DOI： |
| 中文关键词: 视频流； 差错保护； 分层正交调幅； 资源映射； 差错率； 峰值信噪比 |
| 英文关键词: video stream, error protection, hierarchical quadrature amplitude modulation(HQAM), resource mapping, error rate, peak signal-to-noise ratio（PSNR） |
| 基金项目: |
| 作者 | 单位 | | 赵海军* | (*西华师范大学计算机学院南充 637009)
(**西南民族大学计算机科学与技术学院成都 610041) | | 陈华月* | | | 崔梦天** | |
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| 中文摘要: |
| 本文针对宽带无线通信中视频流的差错保护进行了研究。首先，建立了应用于本文方案的H.264/AVC应用层和IEEE 802.16m物理层跨层系统模型；然后，通过对多天线不等差错保护(unequal error protection，UEP)和单天线分层正交调幅不等差错保护的深入分析，提出了一种在物理层实现对具有不同优先级数据的不同保护级别的资源映射方法，从而实现将多天线的不等差错保护和分层正交调幅(hierarchical quadrature amplitude modulation，HQAM) 单天线的不等差错保护相结合的新的HQAM-多输入多输出(multiple-input multiple-output，MIMO)不等差错保护方案。仿真实验结果表明，本文提出的基于HQAM 和资源映射的MIMO 不等差错保护方案，无论在获得的数据包差错性能和非应答(negative-acknowledgement，NACK)比性能方面，还是在获得的视频峰值信噪比(peak signal-to-noise ratio，PSNR)性能方面都优于传统的多天线的不等差错保护方案和单天线的HQAM 不等差错保护方案。 |
| 英文摘要: |
| In this paper, the error protection of video stream in broadband wireless communication is studied. Firstly, a cross-layer system model of H.264/AVC（advanced video coding）application layer and IEEE 802.16m physical layer ,which is applied to the proposed scheme, is established. Then, through the in-depth analysis of multi-antenna unequal error protection and single-antenna hierarchical quadrature amplitude modulation (HQAM) unequal error protection, a resource mapping method is proposed to realize different protection levels of data with different priorities at the physical layer. Thus, a new HQAM- multiple-input multiple-output （MIMO）unequal error protection scheme combining multi-antenna unequal error protection and HQAM single-antenna unequal error protection is realized. The simulation results show that the proposed MIMO unequal error protection scheme based on HQAM and resource mapping is superior to the traditional multi-antenna unequal error protection scheme and single-antenna HQAM unequal error protection scheme in terms of packet error performance and negetive-acknowledgement(NACK) ratio performance, as well as video peak signal-to-noise ratio (PSNR) performance. |
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