基于毫米波宽带变频通道群时延均衡研究

发布时间：2018-05-31 16:30

本文选题：宽带变频通道 + 相位失真　；参考：《南京理工大学》2017年硕士论文

【摘要】：在通信领域当中,随着通信调制方式的日益复杂以及信道传输容量的日益增大,数据传输的码速率越来越高。为了保证信号的不失真传输,对群时延指标有着更加严格的要求。群时延的指标反映的是系统的相位线性化指标,群时延的波动会导致波形失真,恶化基带信号的码间窜扰,降低信号传输质量,影响传输信号的正确接收和解调。对于宽带信号来说,由于其信号的带宽很宽,通带内的群时延失真会对接收信号的误码率产生较大的影响。文中以4PSK调制方式为例,采用Matlab仿真环境,研究了群时延的失真对系统误码率的影响。同时设计了一个应用于通信领域的毫米波(V波段)宽带下变频通道。在ADS的仿真环境下,基于该宽带变频通道,对变频信道的主要组成部分,如放大器、滤波器和混频器的群时延特性分别进行了仿真分析,得出了通道内不同类型的放大器、滤波器和混频器的群时延特性曲线。文章的核心部分,提出了几种不同的群时延均衡结构对变频信道的群时延进行了均衡。均衡的结构包括集总参数全通网络、环形微带网络以及基于SIR谐振器的可变均衡器。最后的测试表明,均衡器对宽带变频通道的群时延失真进行了有效的补偿。
[Abstract]:In the field of communication, with the increasing complexity of communication modulation and the increasing capacity of channel transmission, the code rate of data transmission is getting higher and higher. In order to ensure the signal transmission without distortion, the group delay index has more strict requirements. The index of group delay reflects the index of phase linearization of the system. The fluctuation of group delay will lead to waveform distortion, worsen the inter-symbol interference of baseband signal, reduce the quality of signal transmission, and affect the correct reception and demodulation of the transmitted signal. For wideband signals, due to the wide bandwidth, the group delay distortion in the passband will have a great impact on the BER of the received signals. Taking 4PSK modulation as an example, the effect of group delay distortion on the bit error rate of the system is studied by using Matlab simulation environment. At the same time, a wideband down-conversion channel is designed for millimeter-wave V band. In the ADS simulation environment, based on the broadband frequency conversion channel, the main components of the frequency conversion channel, such as amplifier, filter and mixer group delay characteristics are simulated and analyzed, and different types of amplifiers in the channel are obtained. Group delay characteristic curve of filter and mixer. In the core of this paper, several different group delay equalization structures are proposed to equalize the group delay of frequency conversion channel. The equalization structure includes lumped parameter all-pass network, annular microstrip network and variable equalizer based on SIR resonator. Finally, the test results show that the equalizer can compensate the group delay distortion effectively.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN911.3

【相似文献】