Adaptive frequency-domain joint equalization and interference cancellation for multi-user space-time block-coded systems

We develop an efficient adaptive receiver for joint equalization and interference cancellation for multi–user space–time block– coded transmissions. The receiver exploits the code structure and allows multiple user transmissions over frequency–selective fading channels with reduced complexity and lower system overhead. The adaptation scheme is based on a recursive least–squares implementation for faster convergence; nevertheless, it exploits the code structure to attain RLS performance at LMS complexity.