Statistical Properties and
Channel Capacity of the 3D Massive MIMO GBSM
At the transmitter, adaptive modulation is separately implemented on OFDM subchannels in V-BLAST system and Alamouti coding system according to the channel state information (CSI) fed back from the receiver, where power and bits are allocated based on the idea of maximizing the
channel capacity. Then MIMO scheme with higher modulation order is determined as the proper one.
Firstly, the variations of SNR and
channel capacity with communication distance R are investigated.
Numerous researchers have worked on the study of
channel capacity over different fading channels.
The simplified
channel capacity loss of a 2 x 2 MIMO system can be evaluated by using the following equation, given in [9, 12]:
Through the analysis on the
channel capacity and the condition number of matrix as well as other characteristic parameters, comparative analysis on the changes of channel characteristics under different parameters has been made, namely, the different antenna layouts, different transmission distance, different positions of diffuser, and so on.
The effect of the antenna directionality to 60 GHz
channel capacity is studied in [5].
Also a most vital and advantageous utilization of relay node placement in wireless network is Network Capacity Enhancement by improving the
channel capacity [12][7].
Based on these investigations, we propose antenna designs comprising of two-and eight-element antennas that achieve the highest MIMO
channel capacity compared to their counterpart multi-antenna structures.