For this scheme, there is a reduced interference from the adjacent cells and the intelligently subcarriers allocation increases the signal gain.
As for the users suffering severe interference from adjacent cells, the power control itself with full frequency reuse may not be suitable for well controlling the interference.
Conversely, a radio resource can be also orthogonally allocated among all the RSs without any frequency reuse, completely avoiding co-channel interference in the same cell, while limiting co-channel interference from adjacent cells only to some data regions.
The wideband interference from adjacent cells is white noise-like and by applying wideband transmit beamforming weights selected by an interfered user the noise level can be decreased.
In this case, reception at the MS suffers from high co-channel interference from adjacent cells and a very poor SINR since we are considering universal frequency reuse among cells.
Like an onion epidermal peel, each hermaphroditic gametophyte is a single cell layer thick, making phenotypes easy to observe without interference from adjacent cell layers.
This model is accurate when interferences from adjacent cells are perfectly randomized with respect to the cell of interest.
Thus, users in the cell of interest will be affected by the same interferences from adjacent cells during all hops.
In clustered FH-OFDMA, if interference occurs on any symbol on one subcarrier in the cluster, all other symbols in the same cluster will also experience interferences from adjacent cells.
Similarly, the MS can determine H GI ( i, k ) H H GI ( i, k ) by estimating the covariance matrix of aggregate interference signals that come from adjacent cells during the downlink period.
For the multi-cell case, the distributed RRH ports from adjacent cells may change the interference statistics.
