【作者】 江舟；

【导师】 葛万成；

【作者基本信息】 同济大学 ， 信号与信息处理， 2007， 硕士

【摘要】 单载波频域均衡(SC-FDE)技术，不仅可以有效对抗信道的频率选择性衰落，实现高速率、大容量的通信传输，而且能够避免单载波时域均衡(SC-TDE)复杂度大和正交频分复用(OFDM)技术峰均比高的不足，是宽带无线接入系统物理层的重要组成技术。近几年来，关于单载波频域均衡的讨论日渐增多，并且已经被纳入IEEE802.16(WIMAX)标准中，然而目前对SC-FDE的研究大多还只是集中在理论仿真阶段，很少有实际的系统实现。本文首先对SC-FDE传输系统的建立进行了可行性分析。在信道容量，信号峰值平均功率比以及理论误码性能方面，与传统的OFDM传输系统进行了比较分析。经过分析，在一般的情况下，SC-FDE系统的信道容量更小，具有更低的峰均比。在信噪比较高的情况下，与OFDM系统相比，SC-FDE系统具有较低的误码率；而在信噪比较低的情况下，OFDM系统在误码率方面要略优于SC-FDE系统。经过可行性分析论证，本文对SC-FDE系统中的关键技术：同步技术(包括帧同步，位同步及载波同步)，频域均衡算法进行了研究。然后在ADS仿真平台上进行了基于迫零算法的SC-FDE系统的建模和仿真。由仿真结果分析得出，经过SUI-3无线信道后的数据在经过基于迫零算法的频域均衡模块后可以得到很好的恢复，整个SC-FDE传输模型具有较低的误码率。随后，本文在基于TMS320C6713的DSP开发平台上完成了SC-FDE系统发送和接收各个子模块的调试，初步建立了一个SC-FDE实现系统。另外，本文设计的硬件实现系统还使用了EDMA传输技术实现了音频数据传输在SC-FDE系统中的应用。最后，本文针对理论分析和仿真结果，结合实际系统硬件实现中遇到的问题，探讨了今后的改进方法。更多还原

【Abstract】 SC-FDE (Single Carrier-Frequency Domain Equalization) allows anadvantageous of high-speed data transmission in frequency-selective fading channel.It avoids the complexity of SC-TDE (Single Carrier-Time Domain Equalization) andthe high PAPR (Peak Average Power Ratio) of OFDM (Orthogonal FrequencyDivision Multiplexing) as well. It becomes one of the most important components ofthe wideband wireless access technique. In recent years, there is more and morediscussion about SC-FDE, including been brought into the IEEE802.16 (WIMAX)protocol. However, most of research work still focuses on theories and simulation ofparts or whole system, and less implementation in real hardware platform.First, the thesis analyzes the feasibility of building SC-FDE system. It comparesthe SC-FDE system with OFDM system in the following aspects, such as channelcapability, PAPR and BER (Bit Error Rate) in theory. By analysis, SC-FDE systemhas smaller channel capability and lower PAPR normally. Compared with OFDMsystem, SC-FDE has lower BER with high SNR (Signal Noise Ratio), while SC-FDEhas higher BER with low SNR.Through the analysis of feasibility, the thesis begins to research on the keytechniques of SC-FDE system, including frame synchronization, bit synchronization,carrier synchronization and frequency domain equalization algorithm. Then itcompletes the simulation of SC-FDE system based on the Zero-Forcing algorithm onADS simulation platform. After analyzing the result of simulation, it can recover thedata well which are sent to SUI-3 channel and through the frequency domainequalization module based on ZF algorithm at receiver. The result proves that thewhole SC-FDE system of simulation has low BER.Then, the author completes the debugging of submodules of SC-FDE system attransmitter and receiver on the DSP platform based on TMS320C6713 chip. Inaddition, it implements the audio data transmission in SC-FDE system by usingEDMA transmission technique. Finally, according to the limitation of the SC-FDE system designed both insimulation and implementation, some ideas are discussed to improve the performancefor the future.更多还原