Channel Estimate Training Sequence Design And Application In Millimeter Wave Mimo Communication System

With the increasing of wireless communication devices in low frequency band,low-band spectrum resources have been difficult to meet people's higher requirements for communication speed and communication quality.High frequency band wireless communication system has abundant spectrum resources.On the one hand,it can better meet the requirements for high-speed and high reliable data transmission.On the other hand,it can effectively alleviate the congestion problem of low-frequency wireless communication.Therefore,high-band wireless communication system,especially in millimeter-wave frequency band communication systems is getting more and more attention.Different technologies will be introduced in different communication systems,and it is necessary to design corresponding physical layer technologies.This paper designs the channel estimation sequence under the large time delay and channel binding scenario in the high frequency millimeter wave MIMO communication system.Firstly,the frequency domain channel estimation sequence in millimeter wave MIMO OFDM communication system is designed Based on the analysis of the frequency domain channel estimation sequence design requirements of low peak-to-average power ratio(PAPR)with frequency constraints,such as DC zero subcarriers and high frequency zero subcarriers,in this thesis,two design schemes of channel estimation training sequence in frequency domain based on Zadoff-Chu sequence and Golay pair/mate sequence are presented.Simulation is carried out in the model of IEEE 802.11 ay conference room of millimeter wave communication standard.Simulation results show that the two schemes have lower PAPR and can be easily adapted to suit for the channel estimation requirements of large tap time delay,multiple antennas and channel bonding requirement.Based on the design requirements of IEEE802.11 ay EDMG OFDM PHY EDMG-CEF training sequence in frequency domain,the two designs are verified and analyzed to show that,both designs can meet the design requirements by IEEE802.11 ay EDMG OFDM PHY requirement.Secondly,the time domain channel estimation for single carrier(SC)millimeter wave MIMO training sequence is designed.In order to adapt to the large channel tap time delay,multiple antenna,channel bonding scenarios,this thesis proposes a time-domain channel estimation training sequence design on the basis of the Zadoff-Chu sequence.Simulation is carried out in the model of IEEE 802.11 ay conference room of millimeter wave communication standard.Simulation results show that the proposed time domain channel estimation sequence design has the advantages in terms of the channel estimation overhead,low computational complexity and channel estimation quality.The IEEE802.11 ay EDMG SC PHY time domain standard EDMG-CEF training sequence design requirements is presented to verify the proposed design and we show that,the proposed design scheme is able to reduce almost half of the required training cost,when compared with the existing IEEE802.11 ay D0.8 design.In addition,the proposed time domain training sequence support the channel parameters by using the simple correlation operation,which may avoid the complicated inverse matrix computation while attaining better channel estimation performance.The relevant analysis work of the paper has certain reference value for the further study of the high-performance channel estimation training sequence designed for millimeter-wave MIMO communication systems.