Determination of a multigroup antenna code book using beamforming techniques

A base station for wireless communication, comprising:

• a first transmitter, to transmit first information;
• and
• a second transceiver, to receive a first radio signal;
• wherein the first information is used for indicating a first offset set, and the first offset set comprises K1 first-type offsets;
• time domain resources occupied by the first radio signal start from a first time, a time interval between the first time and a second time is equal to a target offset, and the target offset is one of the K1 first-type offsets;
• a transmitter of the first radio signal selects the target offset from the K1 first-type offsets autonomously;
• the second time is a start time of a first time window;
• time domain resources occupied by the first radio signal belong to the first time window;
• a first antenna port group is related to the first offset set;
• the first antenna port group comprises a positive integer number of antenna ports;
• a transmitter of the first radio signal transmits the first radio signal using the first antenna port group;
• and
• the first information is transmitted through an air interface;
• the K1 is a positive integer;
• the first radio signal occupies a partial of one multicarrier symbol and a positive integer number of complete multicarrier symbols successively in time domain, and the partial of one multicarrier symbol occupied by the first radio signal is a cyclic extension of an earliest complete multicarrier symbol occupied by the first radio signal;
• wherein, the transmitter of the first radio signal selecting the target offset from the K1 first-type offsets autonomously refers to:
• the transmitter of the first radio signal randomly selecting one first-type offset from the K1 first-type offsets as the target offset;
• the first radio signal is transmitted on a Physical Uplink Shared Channel.

A method in a UE for wireless communication, comprising:

• receiving first information;
• and
• transmitting a first radio signal using a first antenna port group;
• wherein the first information is used for indicating a first offset set, and the first offset set comprises K1 first-type offsets;
• time domain resources occupied by the first radio signal start from a first time, a time interval between the first time and a second time is equal to a target offset, and the target offset is one of the K1 first-type offsets;
• the UE selects the target offset from the K1 first-type offsets autonomously;
• the second time is a start time of a first time window;
• time domain resources occupied by the first radio signal belong to the first time window;
• the first antenna port group is related to the first offset set;
• the first antenna port group comprises a positive integer number of antenna ports;
• and
• the first information is transmitted through an air interface;
• the K1 is a positive integer;
• the first radio signal occupies a partial of one multicarrier symbol and a positive integer number of complete multicarrier symbols successively in time domain, and the partial of one multicarrier symbol occupied by the first radio signal is a cyclic extension of an earliest complete multicarrier symbol occupied by the first radio signal;
• wherein, the UE selecting the target offset from the K1 first-type offsets autonomously refers to:
• the UE randomly selecting one first-type offset from the K1 first-type offsets as the target offset;
• the first radio signal is transmitted on a Physical Uplink Shared Channel.