During a diversity reception, a diversity gain is controlled such that the diversity gain is reduced by a given value.
A frequency selective scheduling gain and a frequency diversity gain can be obtained.
Such a transmitting apparatus obtains a maximum diversity gain.
Provided are a frequency allocation method and a detection method capable of simultaneously obtaining a frequency diversity gain and a time diversity gain.
Said space-time trellis code can attain the completely diversity gain and the maximal coding gain simultaneous.
The frequency diversity gain for transmission diversity is obtained with one symbol in a frequency-controlled single carrier system.
The matrices define an optimal tradeoff of diversity gain versus spatial multiplexing.
A diversity gain may be achieved by combining signals from multiple base stations.
The present invention employs a design solution of designing a higher-order modulation diversity and space interleaver to obtain the higher diversity gain.
The apparatus makes a cyclic delay diversity (CDD) scheme to have the diversity of time and frequency domains, and may acquire an additional diversity gain by a combination of the above-mentioned methods.
By doing so, we can increase the transmission efficiency through obtaining both orthogonality and diversity gain in the multi-user MIMO system.
When the combination of the spatial-frequency encoding and the phase offset is applied, the spatial multiplexing gain and the frequency diversity gain are acquired simultaneously.
Subchannelization can be effectively achieved while maintaining a frequency selective scheduling gain and a frequency diversity gain to the maximum extent possible.
For heterogeneous deployed antennas, spatial diversity gain is achieved by dynamically scheduling resources between transmission points.
By using the scheme of the invention, the abrupt error caused by the deep channel fading is avoided effectively, and the improved diversity gain is provided.
If a specific one codeword is mapped to at least two layers, a diversity gain can be acquired.
Methods and apparatus for increasing diversity gain at a receiver by applying beamforming to transmit diversity space-time coded signals.
Methods and apparatus for increasing diversity gain at a receiver by applying beamforming to transmit diversity space-time coded signals.
The invention has the character of optimization in the existing space-time block coding technique, especially, at the receiving end, simultaneous reaching the high coding gain and the diversity gain.
Said Hybrid Automatic Repeat Request method can adopts Chase combination method; The system obtains diversity gain and improves its capability further by adopting the Chase combination method.
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