Channel Capacity Analysis With Transmitter Impairments For MIMO Channels

Nowadays,in our country,with the development of mobile communications and the improvement of people's living standards,mobile communications has become more and more popular,and the society has higher and higher requirements for communication quality.In order to meet the increasing communications needs of people,new technologies are emerging.The emergence of Multiple-Input Multiple-Output(MIMO)technology has greatly improved the channel spectrum efficiency.Especially in recent years,3D MIMO is a new technology for the fifth generation mobile networks(5G).It is a hotspot of research in recent years.In this thesis,we mainly study the channel capacity of different MIMO channel models and explore the channel capacity performance under the transmitter impairments.In order to more accurately evaluate and simulate the channel capacity and communication system performance indicators in different environments,it is necessary to propose different channel models to describe the channels.The capacity of the channel is an important indicator reflecting the quality of communications and an important basis for evaluating different channel models.In this thesis,we have deduced the MIMO channel capacity.Deriving SISO and MIMO channel capacity expressions,to highlight the benefits of MIMO modeling by comparing the channel capacity.also study the distribution of the power at the transmitter(water injection method,equal power allocation method)and whether the channel state information of the transmitter is known to describe the influence on the channel capacity.The difference between two-dimensional and three-dimensional channel capacity of Kronecker channel model is studied to highlight the advantages of three-dimensional modeling and show the necessity of three-dimensional modeling.This thesis proposes a new millimeter-wave MIMO channel model.Based on the proposed channel model,it considers many influencing factors(cluster and sub-path,antenna array response,path attenuation,intersymbol interference,etc.),and proposes a new three-dimensional MIMO millimeter-wave channel model.The channel capacity is simulated and its performance is compared with other models.This thesis also considers the influence of the physical transmitter impairments on the channel capacity.The 3D MIMO millimeter-wave channel model proposed in this thesis only considers multiple channel conversion and additional thermal noise.In reality,the transmitter suffers from a series of factors(amplifier non-linearities,IQ imbalance,phase noise,quantization noise,carrier frequency and sample rate jitter/offset)cause the transmitter to be imperfect,but this situation is not described.In this thesis,we reduce the impact of the damage by the compensation scheme,leaving the residual distortion with the variance of the signal-to-noise ratio(SNR)for channelsimulation,and describe the effect on the ideal channel capacity under the transmitter impairments.The transmitter impairments are brought into the 3D MIMO millimeter-wave channel model and 3D Kronecker channel model proposed above to simulate the effect of transmitter impairments on this model.