Research On Single Carrier Frequency Domain Equalization System

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.