First Communication Device and Methods Performed Thereby for Transmitting Radio Signals using Beamforming to a Second Communication Device

A method performed by a third communication device for decoding radio signals received from a second communication device, the second communication device and the third communication device operating in a wireless communications network, the method comprising:

• receiving an indication from the second communication device, the indication being of at least one of:
• an adapted pre-coder used by the second communication device to transmit the radio signals to the third communication device using beamforming, an adapted modulation, an adapted coding scheme, and an estimated variation of a Signal to Interference Noise Ratio (SINR) of a channel used to transmit the radio signals, the at least one of the adapted pre-coder, the adapted modulation, the adapted coding scheme and the estimated variation of the SINR being based on a change, over a single time period of transmission of the radio signals, in a state of the channel, the state having been measured by the second communication device;
• and
• decoding the radio signals based on the received indication.

A non-transitory computer readable medium storing a computer program performed by a third communication device for decoding radio signals received from a second communication device, the second communication device and the third communication device operating in a wireless communications network, the computer program comprising instructions that, when executed on at least one processor of the third communication device, cause the at least one processor to:

• receive an indication from the second communication device, the indication being of at least one of:
• an adapted pre-coder used by the second communication device to transmit the radio signals to the third communication device using beamforming, an adapted modulation, an adapted coding scheme, and an estimated variation of a Signal to Interference Noise Ratio (SINR) of a channel used to transmit the radio signals, the at least one of the adapted pre-coder, the adapted modulation, the adapted coding scheme and the estimated variation of the SINR being based on a change, over a single time period of transmission of the radio signals, in a state of the channel, the state having been measured by the second communication device;
• and
• decode the radio signals based on the received indication.

A first communication device configured to adapt a pre-coder, the pre-coder being configured to be used by a second communication device to transmit radio signals using beamforming to a third communication device, the first communication device, the second communication device, and the third communication device being configured to operate in a wireless communications network, the first communication device comprising:

• communication circuitry configured for directly or indirectly communicating with the second communication device;
• and
• processing circuitry operatively associated with the communication circuitry and configured to:
• adapt, over a single time period of transmission of the radio signals, the pre-coder configured to be used by the second communication device to transmit the radio signals to the third communication device using beamforming,
• wherein the adapting is based on a change, over the single time period, in a state of a channel used to transmit the radio signals, the state being measured by the second communication device.

A third communication device configured to decode radio signals received from a second communication device, the second communication device and the third communication device configured to operate in a wireless communications network, the third communication device comprising:

• communication circuitry configured for receiving the radio signals from the second communication device;
• and
• processing circuitry operatively associated with the communication circuitry and configured to:
• receive an indication from the second communication device, the indication being of at least one of:
• an adapted pre-coder configured to be used by the second communication device to transmit the radio signals to the third communication device using beamforming, an adapted modulation, an adapted coding scheme, and an estimated variation of a Signal to Interference Noise Ratio (SINR) of a channel used to transmit the radio signals, the at least one of the adapted pre-coder, the adapted modulation, the adapted coding scheme and the estimated variation of the SINR being based on a change, over a single time period of transmission of the radio signals, in a state of the channel, the state having been measured by the second communication device;
• and
• decode the radio signals based on the received indication.