Exact(13)
Many advanced channel estimation and equalization algorithms have been proposed for high-rate coherent underwater acoustic communications.
Actually, MIMO technology is combined with orthogonal frequency division multiplexing (OFDM) and advanced channel coding schemes such as turbo codes to support the increase of reliable data transmission.
Advanced channel modeling is also recognized as a major topic by two on-going research programs in Europe: the Network of Excellence in Communications NEWCOM++ and the European COST 2100 Action "Pervasive Mobile & Ambient Wireless Communications".
We assume that all the scheduled packets can be transmitted to the client successfully by advanced channel coding.
For rate adaptation, it turned out during simulations, that this SINR bound is not sufficiently accurate, especially in connection with the more advanced channel direction quantizers presented below.
The LS channel estimator is replaced by a more advanced channel estimator recently tested in [16], that exploits the sparse nature of UWA channels.
Similar(47)
The generation of all the other parameters can be the same as the original IMT-Advanced channel model.
In current ITU-R IMT-Advanced channel model, the downlink AoD of the m th subpath of the n th path, ϕ n, m, is generated LoS-centered.
So, such spatial characteristic of typical UMi scenario can be captured into the IMT-Advanced channel model with the proposed distribution.
In LTE-Advanced, channel state information reference signals (CSI-RSs) have been introduced for the use of up to eight transmit antennas [25].
However, in the existing channel models such as IMT-Advanced channel model, it assumes that the PAS follows wrapped Gaussian or Laplacion distribution with its center along the LoS direction.
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