Identical eigenmode transmission systems (IETS) – A channel decomposition perspective

In the past few years considerable attention has been given to the design of multiple-input multiple-output (MIMO) eigenmode transmission systems (EMTS). This paper presents an in-depth analysis of a new MIMO eigenmode transmission strategy. The non-linear decomposition technique called geometric mean decomposition (GMD) is employed for the formation of eigenmodes over MIMO flat-fading channel. Exploiting GMD technique, identical, parallel and independent transmission pipes are created for data transmission at higher rate. The systems based on such decomposition technique are referred to as MIMO identical eigenmode transmission system (IETS). The comparative analysis of the MIMO transceiver design exploiting non-linear and linear decomposition techniques for variable constellation is presented in this paper. The new transmission strategy is tested in combination with the Vertical Bell Labs Layered Space Time (V-BLAST) decoding scheme using different number of antennas on both sides of the communication link. The analysis is supported by various simulation results.