Mathematical modeling and calibration procedure of combined multiport correlator

Abstract

Increasing amounts of information transmitted-by-the-air provides an expansion of the data transmission bandwidth and an increase in the requirements for transmitting and receiving devices. This problem can be solved with the help of software defined radio systems (SDR). Special types of multiport devices are promising elements of the SDR systems, because of the low production costs and the possibility of using them in the wideband microwave radio systems. Combined multiport correlator (CMPC) is the one of such devices. This multiport device is the symbiosis of a multiport correlator and multi-probe transmission line, which allows it to be calibrated without preciously known loads. This article presents a mathematical model of the combined multiport correlator that allows to transmit data in a wide frequency band, which is very important for modern software defined radio systems. High efficiency of CMPC was confirmed with the help of the numerical experiments. The computer simulation confirms theoretical conclusions.