Research On Short Burst Synchronization Technology In Multi-antenna And Single Carrier System

In broadband wireless communication,the technology of single-carrier frequency domain equalization(SC-FDE)has a significant effect on the inter-code interference which is caused by selective fading of channel frequency.The technique of multiple input multiple output(MIMO)utilizes space resources to enable the communication system to increase the utilization of the system capacity and bandwidth without increasing the transmission power and bandwidth,and then improve the communication quality of wireless communication.MIMO SC-FDE System combines MIMO and SC-FDE,can efficiently use of the advantages of them,so it can not only increase the channel capacity but also counter channel interference.The characteristic of short burst signal is that the signal lasts for a short period of time and the continuous cycle of each burst signal is not fixed,and it is sent in a sudden way,so it has a strong ability to resist interference,and it is difficult for the enemy in the aspects of capture and detection.Because of these excellent characteristics,short burst signals are widely used in military communications,deep space communications and other fields with high requirements for signal transmission concealment.However,in the communication environment such as high noise and multipath fading,the reliability of burst communication can not be guaranteed.The main work of this paper is to study the synchronization performance of MIMO SC-FDE system,and to study the short burst synchronization technology which is realized under the MIMO SC-FDE system and mainly includes symbol timing synchronization and carrier frequency offset synchronization.In order to adapt to the short burst synchronization,this paper studies the synchronous frame structure.the paper firstly simulates the correlation performance of each the existing training sequence in the short burst situation,then analyzes and compares the performance requirements of short burst synchronization.In order to improve the accuracy of timing synchronization in low SNR environment,the training sequence in synchronous frame uses the Constant Amplitude Zero Autocorrelation(CAZAC)sequence.In order to ensure the stability of the system transmission in the long distance scattering environment,the space time block coding(STBC)technique is used to obtain the diversity gain against multi-path fading in the time and space domain,which can effectively improve the reduction of the emission signal.Because the effective signal of the transmission is very short,the period is only 1ms,and the synchronization cost is very little,and at the same time,it needs to fight against the bad communication environment,so in this paper,a new frame structure is proposed to obtain better synchronization performance under low SNR.Finally,through MATLAB simulation software,the synchronous method of the research is simulated and verified,and the results show that the proposed synchronous frame structure can achieve good results under low SNR environment.