Analytical framework for outage and BER analysis of the V-BLAST algorithm

Analytical approach to outage and BER analysis of V-BLAST and D-BLAST algorithms in i.i.d. Rayleigh channel is presented in this paper. Based on the previous results, which allow an exact analytical BER and outage analysis of a 2×n system in a closed-form, generic case of m×n system is analytically analyzed. While closed-form exact analysis is not feasible, a tight bound for the outage probability is derived and validated using Monte-Carlo simulations. It is shown that the optimaI ordering procedure results at a SNR gain of m at the 1^st step for m≤4. We conjecture that this is true for larger m as well. The results above are also extended to the case of a D-BLAST system.