摘要
光纤无线电技术是近年发展起来的一种新兴宽带传输技术,满足日益增长的用户带宽需求和灵活的移动接入。然而,由于电光转换的非线性失真和无线信道的多径衰落,接收信号会受到干扰的影响而恶化,因而需要采用均衡技术对信道响应进行补偿。文中将上行信道等效为Wiener模型,接收端均衡器首先补偿光纤信道的非线性失真,减少交扰调制失真,然后采用判决反馈结构的均衡器对无线信道的响应进行补偿减少码间干扰。仿真结果验证了该方法的有效性。
Radio-over-fiber （RoF） technology has been suggested to meet the ever increasing user bandwidth demands and mobility, However, for the nonlinear distortion due to electrical to optical conversion and linear distortion due to wireless channel multipath fading, the received signal is severely corrupted, The channel response can be compensated by equalization technologies. In this paper, the uplink is equaled by Wiener model. The nonlinear distortion is compensated first, reducing the power of cross modulation products, Then the wireless channel response is compensated by equalization technologies based on decision feedback structure, reducing the inter_symbol interference, The effectiveness of the proposed algorithm is verified by simulation.
出处
《通信技术》
2007年第11期7-9,共3页
Communications Technology
