基于加权分数傅里叶变换域的2天线发射方法

发布时间：2018-01-20 22:23

本文关键词： 加权分数傅里叶变换混合载波调制多天线双弥散信道误码率　出处：《哈尔滨工业大学学报》2017年05期 　论文类型：期刊论文

【摘要】：为改善多天线系统误码率,提出一种基于加权分数傅里叶变换域的2天线发射方法.该方法在发射端将待发送信号送入信息调制及合成模块中进行加权分数傅里叶变换,按照时频域信号合并方式将变换后的四路信号分量合并为两路混合载波信号,经时延调整后由2根发射天线发射送入信道;接收端采用单天线接收,对接收信号进行加权分数傅里叶反变换处理后,可得到原发送信号估计值.仿真结果表明:在双弥散信道下,相比于使用空时码2天线发射方法,采用本文提出的发射方法在系统误码率及复杂度方面较有优势,可有效改善系统误码性能,抵抗信道衰落.
[Abstract]:In order to improve the error rate of multi-antenna system. A method of transmitting 2 antennas based on weighted fractional Fourier transform (WFFT) domain is proposed, in which the signal to be transmitted is sent into the modulating and synthesizing module of the information at the transmitter for weighted fractional Fourier transform. According to the time-frequency domain signal combination mode, the converted four-channel signal components are combined into two mixed carrier signals, and transmitted into the channel by two transmitting antennas after the delay adjustment; The receiver uses a single antenna to receive the received signal, and the original signal estimation can be obtained by using weighted fractional Fourier inverse transform. The simulation results show that: in the dual dispersion channel. Compared with the transmit method using space-time code 2 antenna, the proposed method has advantages in bit error rate (BER) and complexity of the system, which can effectively improve the performance of the system and resist channel fading.
【作者单位】：哈尔滨工业大学通信技术研究所;
【基金】：国家重点基础研究发展计划(2013CB329003) 国家自然科学基金(61671179)
【分类号】：TN820
【正文快照】： 随着信息社会迅速发展,信道环境变得愈加复杂,对通信质量产生严重影响.为了改善系统性能,马可尼提出了MIMO(multiple-input multiple-output)技术.该技术能够有效地利用空间资源[1],增加系统信道容量,提高传输速率和误码性能.空时分组码STBC(space time block code)是一种能够

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