The mmW cellular systems of large bandwidths offer multiple times rise in capacity as compared to existing 4G networks with comparable cell density. These avoid the unnecessary cell splitting by enlarging the capacity of individual tiny cells significantly in a scenario of very high-density cell deployments. This work will provide an opportunity to achieve a particular capacity value by varying the mmW channel gain in the 5G and 6G wireless networks. The OMP algorithm is modified and the existing sparse signal processing concept is utilized for the capacity analysis of hybrid MIMO here. The capacity (b/s/Hz) of the conventional and hybrid MIMOs are calculated and compared against given SNR range (dB) in a 5G mmW heterogeneous network under different values of mmW channel gain. It has been found that capacity analysis curves of conventional and hybrid MIMOs both show a descending trend with the increase in SNR range as the channel gain is increased due to over-saturation of the used sparse mmW channel. These curves exhibit local variation, time dependence, frequency selectivity, reliable communication rate, and diversity on both ends and the use of MIMO has a gain in degrees of freedom. The hybrid MIMO due to hardware limitations of conventional MIMO utilized a large number of antennas with lesser radio frequency chains. At some point of channel gain, its capacity curve approached the capacity curve of conventional MIMO in a moderate SNR range, and approached very closely for all channel gains in low and high SNR ranges.

与现有的4G网络相比，大带宽的mmW蜂窝系统的容量提高了数倍，并且具有相当的蜂窝密度。这些通过在非常高密度的小区部署情况下显着增加单个微小小区的容量来避免不必要的小区分裂。这项工作将为通过改变5G和6G无线网络中的mmW信道增益提供实现特定容量值的机会。在此，对OMP算法进行了修改，并将现有的稀疏信号处理概念用于混合MIMO的容量分析。计算常规MIMO和混合MIMO的容量（b / s / Hz），并将其与5G mmW异构网络中不同毫米波信道增益值下的给定SNR范围（dB）进行比较。已经发现，由于所使用的稀疏mmW信道的过饱和，随着信道增益的增加，常规和混合MIMO的容量分析曲线均显示出随着SNR范围的增加而下降的趋势。这些曲线在两端均表现出局部变化，时间依赖性，频率选择性，可靠的通信速率和分集，并且MIMO的使用在自由度方面有所提高。由于传统MIMO的硬件限制，混合MIMO使用了大量天线且射频链较少。在信道增益的某个点，其容量曲线在中等SNR范围内接近传统MIMO的容量曲线，在低和高SNR范围内的所有信道增益都非常接近。