论文标题
在褪色通道上使用OFDM的图像传输的最小平方频道估计
Least square channel estimation for image transmission with ofdm over fading channel
论文作者
论文摘要
无线沟通是传达人群中音频或视频信息的最有效沟通。它使群众能够在世界范围内建立联系。无线技术改善了农村和沟通不良领域中个人的生活方式。从这种角度来看，可以通过最大程度地减少载体干扰来提高可靠信号的质量。在本文中，图像的位错误率，使用正交频率多路复用和通道估计技术分析了通过褪色通道传输信号。正交频率多路复用（OFDM）具有突出的带宽有效性，并提高了对褪色环境的免疫力。在OFDM中，数据使用彼此正交的多个子载波进行调制。循环前缀在OFDM符号之间插入，以消灭符号间干扰（ISI）和携带者间干扰（ICI）。最小平方通道估计方法用于最大程度地减少多径褪色的效果。使用BPSK，QPSK，16QAM和64QAM数字调制方案调制图像，具有OFDM和通道估计的64QAM数字调制方案，并通过AWGN和褪色通道传输。这项工作的目的是通过减少干扰来提高信号与噪声比。
Wireless communication is the most effective communication to convey audio or video information among the population. It enables the masses to connect throughout the world. Wireless technologies improve the lifestyle of individuals in rural and poor communication areas. In this view, the quality of a reliable signal can be enhanced by minimizing carrier interference. In this paper bit error rate of an image, signal is transmitted over fading channel is analyzed using orthogonal frequency multiplexing and channel estimation technique. An Orthogonal Frequency Multiplexing (OFDM) provides prominent bandwidth effectiveness and improved immunity to the fading environments. In OFDM, the data is modulated using multiple numbers of subcarriers that are orthogonal to each other. A cyclic prefix is infixed between OFDM symbols to annihilate the inter symbol interference (ISI) and inter-carrier interference (ICI). The least square channel estimation method is used to minimize the effect of multipath fading. An image, signal is modulated using BPSK, QPSK, 16QAM and 64QAM digital modulation schemes with OFDM and channel estimation and transmitted over AWGN and fading channel. The objective of this work is to improve the signal to noise ratio by reducing interference.
