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首页> 外文会议>International Conference on Computational Science and Its Applications(ICCSA 2006) pt.5; 20060508-11; Glasgow(GB) >The Performance Evaluation of OFDM/HL-16QAM System for Optimizing Image Transmission Quality in Wireless Fading
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The Performance Evaluation of OFDM/HL-16QAM System for Optimizing Image Transmission Quality in Wireless Fading

机译：OFDM / HL-16QAM系统在无线衰落中优化图像传输质量的性能评估

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摘要

We have evaluated the performance of an OFDM/HL-16QAM system for achieving high quality image transmission. OFDM/HL-16QAM system has the capability of reliable high speed data service and simultaneous transmission of differentiated two quality of data streams in severe multipath fading channel. For application of image transmission, we have proposed the OFDM/HL-16QAM system adopting fixed length DCT based coding to achieve reasonable image compression rate and obtained the optimal hierarchical modulation parameter maximizing PSNR(Peak Signal to Noise power Ratio) of received still image. Then, it has been shown that the received image quality of the proposed system with optimized hierarchical modulation parameter is better than that of conventional OFDM/16QAM system. From the result, it is found that the proposed system is more effective for mobile multimedia services.
机译：我们已经评估了OFDM / HL-16QAM系统实现高质量图像传输的性能。 OFDM / HL-16QAM系统具有可靠的高速数据服务能力，并且可以在严重的多径衰落信道中同时传输差分的两种质量的数据流。对于图像传输的应用，我们提出了采用基于固定长度DCT的编码的OFDM / HL-16QAM系统，以实现合理的图像压缩率，并获得了使接收的静止图像的PSNR（峰值信噪功率比）最大化的最佳分层调制参数。然后，已经表明，所提出的具有优化的分级调制参数的系统的接收图像质量优于传统的OFDM / 16QAM系统。从结果发现，所提出的系统对于移动多媒体服务更有效。

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