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In this paper, closed form expressions are derived for the average data rate and uncoded bit error rate of a multi-user multiple input multiple output (MIMO) orthogonal frequency division multiple access (OFDMA) system, where two transmission modes are considered, both transmitting the data of the scheduled user using orthogonal space-time block coding (OSTBC) at the transmitter and maximum ratio...
This paper considers the two-hop relaying case where two nodes S1 and S2 in a wireless network can communicate with each other via an intermediate relay station (RS) which is equipped with multiple antennas and cannot transmit and receive simultaneously on the same channel resources. In oneway relaying, four orthogonal channel resources are required for the transmissions from S1 to S2 and from S2...
In this paper, space-time block codes (STBCs) are applied in a distributed fashion in a scenario with multiple cooperating relay stations (RSs) having multiple antennas. By applying the Chernoff bound to the theoretical bit error rate (BER) in Rayleigh fading channels, it turns out that the BER performance has a higher sensitivity to spatial correlation in multiple input multiple output channels than...
In this paper, space-time block codes (STBCs), which gain from spatial transmit diversity, are applied in a distributed fashion at several cooperating relay stations (RSs) with multiple transmit antennas. It is well known that non-distributed STBCs exhibit a degraded bit error rate (BER) performance in spatially correlated MIMO channels. Applying distributed STBCs in cooperative relay networks reduces...
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