A robust QR-based detector for V-BLAST and its efficient hardware implementation

The use of multiple antennas at both transmitting and receiving sides of communication channels has increased the spectral efficiency to near the Shannon bound. However algorithmic complexity in the realization of the receiver is a major problem for its implementation in hardware. In this paper, we have investigated a near optimal algorithm for V-BLAST detection in MIMO wireless communication systems, based on QR factorization, offering remarkable reduction in the hardware complexity. Specifically, we have analyzed some hardware implementation aspects of the selected algorithm through MATLAB simulations and demonstrated its robustness. This technique can be used in an efficient fixed point VLSI implementation of the algorithm.