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OFDM Scheme Based on Wavelet Packet Transform-Oriented Graded Multi-Service

机译:面向小波包变换的分级多业务OFDM方案

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摘要

In this paper, a concept of image grading transmission is put forward to enhance data rate and to improve the usage of subcarriers in orthogonal frequency division multiplexing (OFDM). The idea originates from the wavelet packets representative of an image in which information is graded in terms of different priorities. The graded image facilitates more efficient use of adaptive subcarriers and bits allocation. The results of simulation in typical mobile environment prove that the output signal noise ratio (SNR) of the graded image excels that of the ungraded image by 1―2 dB under the same channel condition.
机译:本文提出了一种图像分级传输的概念,以提高数据速率并改善正交频分复用(OFDM)中子载波的使用。该思想源自代表图像的小波包,其中信息根据不同的优先级进行分级。分级图像有助于更有效地使用自适应子载波和比特分配。在典型的移动环境中的仿真结果表明,在相同的信道条件下,渐变图像的输出信号噪声比(SNR)比未渐变图像的输出信号噪声比要高1-2 dB。

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