Design And Application Of Novel Spatial Modulation

With the development of the information society,wireless communication technol-ogy will play a more important role in all areas of society and provide people with a comprehensive information ecosystem.To meet the high-quality transmission require-ments of the next generation of wireless communications,new technologies are needed to support its development.Multiple-input multiple-output(MIMO)system is configured with multiple antennas at the transmitter and the receiver,which can greatly increase the channel capacity and spectral efficiency of the system without increasing the system band-width and the transmit antenna power.MIMO technology provides a feasible solution for the increasing shortage of spectrum resources and becomes one of the key technologies for current and future wireless communications.However,in practical applications,inter-channel interference,inter-antennas synchronization,and the increasing cost caused by multiple radio frequency chains would constrain the development of MIMO systems.As a new MIMO technology,spatial modulation maps part of the information bits to the modulation domain using symbol modulation for transmission.The other part is mapped to the space domain using antenna selection for transmission.The spatial location of the antenna will be used to transmit the information.Compared with traditional multi-antenna technology,only one transmit antenna is active per slot in spatial modulation,and the rest of the transmit antennas are silent.This feature can completely avoid inter-channel interference and inter-antenna synchronization.In addition,because only one RF chain is required,the system cost is also effectively reduced.Based on these advantages,the spatial modulation technology has a good application prospect in the next generation of wireless communication system.In this thesis,the paper has carried out the design and application research of the new spatial modulation technologies.Specifically,the content and innovation of this paper are as follows:1)The basic principle of the generalized spatial modulation technique is deeply s-tudied.In combination with the trellis coded modulation,the trellis coded generalized spatial modulation is proposed to improve the robustness of the system under the Rician correlation channel.A set partition mapping criterion for the antenna domain is designed.By partitioning the mapping,the distance of the transmission antenna group with strong correlation is increased,thereby the bit error rate of the system in a Rician correlation channel can be reduced.Considering the similarity between this technique and the tradi-tional generalized spatial modulation in the modulation domain,the bit error rate of the trellis coded generalized spatial modulation technique in the antenna domain was studied emphatically,and the theoretical performance was deduced.The simulation results show that compared with the traditional generalized spatial modulation,the proposed scheme has better system performance under the Rician correlation channel.Compared with the existing trellis coded spatial modulation,the proposed scheme equips fewer transmit an-tennas,which could effectively save the system cost.2)After deeply studying the differential spatial modulation with PSK modulation and multi-ring APSK modulation,the non-coherent spatial modulation is designed,in which the estimation of the previous transmission block is utilized to eliminate the re-striction of CSI.Moreover,a generalized multi-ring APSK constellation with arbitrary modulation order of PSK on each circle is used in the scheme.The BER performance of this technique is derived.Based on the theoretical performance,the multi-ring AP-SK modulation constellation algorithm which achieves the optimal system performance is proposed.In addition,the influence of error propagation caused by the symbol misesti-mation on system performance is studied.The simulation results verify the correctness of the theoretical derivation,and show that the scheme combined with the optimal multi-ring APSK constellation can effectively reduce the BER and bring the performance gain to the system compared with the scheme using the existing different modulation methods.3)A differential spatial modulation scheme and a differential space shift keying scheme in a two-way relay system with denoise-and-forward strategy are designed,and the diversity gain of the system is analyzed.For the system,the concepts of sets and sub-sets are used to design the physical layer network coding at the relay nodes,i.e.,the multi-to-one mapping criteria of the matrix,and the matrix generation criteria of the source n-odes.The simulation results verify the correctness of the theoretical derivation and show that the proposed differential spatial modulation and differential space shift keying are feasible in a two-way relay system that adopts denoise-and-forward strategy.Compared with the traditional differential modulation,the proposed schemes have a lower BER and better system performance.