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Closed-form expressions for the ergodic capacity for downlink transmission of a distributed antenna system are derived, based on different cooperative transmission schemes including single-antenna transmission (SAT) and dual-antenna transmissions (DAT). For DAT, we consider space-time block coding (STBC) for the open-loop operation, and maximum ratio(More)
Recommended by Marco Luise Recent standards for wireless transmission require reliable synchronization for channels with low signal-to-noise ratio (SNR) as well as with a large amount of frequency offset, which necessitates a robust correlator structure for the initial frame synchronization process. In this paper, a new correlation strategy especially(More)
In this paper, we propose a codebook construction method for multiple-input multiple-output (MIMO) beamforming systems operating under the per-antenna power constraint (PAPC). Under the PAPC which limits the individual power of each transmit antenna, it is known that only phase steering information is required to form the optimal beamforming vector at the(More)
We observe simultaneous transmission of relay stations (RSs) allowed in current IEEE 802.16j draft standard for multi-hop relay networks may involve severe interference among the RSs, hence leading to throughput degradation. Allowing only 1/3 of the RSs to simultaneously transmit instead of 1/2 RSs as in the current draft standard reduces the interference(More)