Method and device in nodes used for wireless communication

A second node for wireless communications, comprising:

• a second transmitter, transmitting a first signaling, the first signaling being used to indicate a target time-frequency resource block;
• and
• a second receiver, receiving a target signal and a target reference signal group in the target time-frequency resource block;
• wherein the target time-frequency resource block comprises multiple REs;
• the target signal comprises a first sub-signal and a second sub-signal, and a number of layers of the target signal is equal to a sum of a number of layer(s) of the first sub-signal and a number of layer(s) of the second sub-signal;
• the first signaling is used to indicate a first reference signal resource group and a second reference signal resource group, the first reference signal resource group is used to determine antenna port(s) for transmitting the first sub-signal, and the second reference signal resource group is used to determine antenna port(s) for transmitting the second sub-signal;
• the target reference signal group comprises P reference signals, the P reference signals are transmitted by P antenna ports respectively, where P is a positive integer greater than 1;
• a first antenna port is any of the P antenna ports, and a first reference signal is a reference signal transmitted by the first antenna port among the P reference signals;
• a first RE is any of REs occupied by the first reference signal, and transmit power of the first reference signal on the first RE is linearly correlated with a linear value of a first factor;
• the first factor is related to whether the first antenna port is associated with the first reference signal resource group or is associated with the second reference signal resource group;
• when the first antenna port is associated with the first reference signal resource group, the first factor is related to the number of layer(s) of the first sub-signal;
• when the first antenna port is associated with the second reference signal resource group, the first factor is related to the number of layer(s) of the second sub-signal;
• the first reference signal resource group comprises at least one reference signal resource, and the second reference signal resource group comprises at least one reference signal resource.

A method in a first node for wireless communications, comprising:

• receiving a first signaling, the first signaling being used to indicate a target time-frequency resource block;
• and
• transmitting a target signal and a target reference signal group in the target time-frequency resource block;
• wherein the target time-frequency resource block comprises multiple REs;
• the target signal comprises a first sub-signal and a second sub-signal, and a number of layers of the target signal is equal to a sum of a number of layer(s) of the first sub-signal and a number of layer(s) of the second sub-signal;
• the first signaling is used to indicate a first reference signal resource group and a second reference signal resource group, the first reference signal resource group is used to determine antenna port(s) for transmitting the first sub-signal, and the second reference signal resource group is used to determine antenna port(s) for transmitting the second sub-signal;
• the target reference signal group comprises P reference signals, the P reference signals are transmitted by P antenna ports respectively, where P is a positive integer greater than 1;
• a first antenna port is any of the P antenna ports, and a first reference signal is a reference signal transmitted by the first antenna port among the P reference signals;
• a first RE is any of REs occupied by the first reference signal, and transmit power of the first reference signal on the first RE is linearly correlated with a linear value of a first factor;
• the first factor is related to whether the first antenna port is associated with the first reference signal resource group or is associated with the second reference signal resource group;
• when the first antenna port is associated with the first reference signal resource group, the first factor is related to the number of layer(s) of the first sub-signal;
• when the first antenna port is associated with the second reference signal resource group, the first factor is related to the number of layer(s) of the second sub-signal;
• the first reference signal resource group comprises at least one reference signal resource, and the second reference signal resource group comprises at least one reference signal resource.

A method in a second node for wireless communications, comprising:

• transmitting a first signaling, the first signaling being used to indicate a target time-frequency resource block;
• and
• receiving a target signal and a target reference signal group in the target time-frequency resource block;
• wherein the target time-frequency resource block comprises multiple REs;
• the target signal comprises a first sub-signal and a second sub-signal, and a number of layers of the target signal is equal to a sum of a number of layer(s) of the first sub-signal and a number of layer(s) of the second sub-signal;
• the first signaling is used to indicate a first reference signal resource group and a second reference signal resource group, the first reference signal resource group is used to determine antenna port(s) for transmitting the first sub-signal, and the second reference signal resource group is used to determine antenna port(s) for transmitting the second sub-signal;
• the target reference signal group comprises P reference signals, the P reference signals are transmitted by P antenna ports respectively, where P is a positive integer greater than 1;
• a first antenna port is any of the P antenna ports, and a first reference signal is a reference signal transmitted by the first antenna port among the P reference signals;
• a first RE is any of REs occupied by the first reference signal, and transmit power of the first reference signal on the first RE is linearly correlated with a linear value of a first factor;
• the first factor is related to whether the first antenna port is associated with the first reference signal resource group or is associated with the second reference signal resource group;
• when the first antenna port is associated with the first reference signal resource group, the first factor is related to the number of layer(s) of the first sub-signal;
• when the first antenna port is associated with the second reference signal resource group, the first factor is related to the number of layer(s) of the second sub-signal;
• the first reference signal resource group comprises at least one reference signal resource, and the second reference signal resource group comprises at least one reference signal resource.