| The objective of this research is to investigate an existing Multiple Input Multiple Output (MIMO) model and then apply it to twisted-pair transmission systems to facilitate a comparison of the resulting MIMO capacity relative to the capacity predicted by current Single Input Single Output (SISO) models for otherwise identical transmission systems. Unlike SISO systems, MIMO systems can cancel crosstalk between channels within the system as well as mitigate any correlated noise ingress from sources external to the system and therefore have potentially greater capacity. A channel model and system definition are first developed for a multi-pair system. Then the capacity equation for multi-pair systems (MIMO and SISO) is derived. Thereafter, two empirically measured sets of crosstalk data are presented and analyzed. The MIMO model is implemented using the measured crosstalk data and the results are compared to SISO model results for the same sets of crosstalk data. These results show that, as expected, MIMO processing provides noteworthy gains in system capacity with respect to SISO system capacity. Finally, a detailed analysis of how the MIMO model mitigates correlated crosstalk is presented. The correlation of the measured crosstalk is calculated and linked directly to MIMO capacity gains. |
