Interference mitigation in multicell LTE systems: Performance over correlated fading channels

We consider a multicell multiple-input-multiple-output (MIMO)orthogonal-frequency-division-multiple-access (OFDMA) scenario conforming to the 3GPP Long Term Evolution (LTE) recommendation. Scheduling policies proposed for interference mitigation in LTE rely on a pseudo-random permutation of the subcarriers (interference randomization) or on a centrally coordinated reuse of the OFDMA bandwidth (interference coordination). For both the approaches, this paper investigates the performance of a multiple antenna communication over a Rayleigh fading multipath channels. An analytical model is derived to assess the average bit error probability for frequencyselective (correlated) channels with either stationary or nonstationary (due to subcarrier permutation) multicell interference. Simulation results corroborate the proposed analytical model for different traffic conditions and propagation scenarios.