A K-Best Version of the Turbo-LORD MIMO Detector in Realistic Settings

In this paper we introduce an improved version of the turbo layered orthogonal lattice detector (T-LORD), recently presented. This implementation, namely K-Best T-LORD, misses the performance of the turbo MAP detector by only few tenths of dB in various configurations, like the fully enhanced T-LORD. However, its complexity is quadratic in the number of transmitting antennas instead of exponential. Moreover, we show that the K-Best T-LORD is robust also over realistic channels, with correlation between tones and antennas, and with imperfect channel state Information at the receiver. This behavior is shown not only via Monte Carlo simulations, but also with EXIT chart analysis.