Communication method, base station, and terminal device

A communication method, comprising:

• receiving, by a terminal device, signals from a base station using n port groups, wherein each of the n port groups comprises at least two ports, and n is a positive integer greater than or equal to 2;
• receiving, by the terminal device, configuration information of each of the n port groups from the base station;
• or transmitting, by the terminal device, configuration information of each of the n port groups, to the base station;
• wherein the configuration information indicates at least one of a frequency domain granularity of phases and a frequency domain granularity of amplitudes of first linear combination coefficients of each port group, and a quantity of quantized bits of the phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each port group;
• and
• transmitting, by the terminal device, s first linear combination coefficient groups to the base station, wherein each first linear combination coefficient group comprises first linear combination coefficients of one of s port groups, at least one first linear combination coefficient group comprises at least two non-zero coefficients, the s first linear combination coefficient groups are used to determine a first precoding matrix, the s port groups are comprised in the n port groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.

An apparatus, comprising:

• one or more processors, and
• a computer-readable storage medium storing program instructions;
• wherein, when executed by the one or more processors, the instructions cause the apparatus to:
• transmit signals to a terminal device using n port groups, wherein each of the n port groups comprises at least two ports, and n is a positive integer greater than or equal to 2;
• transmit, to the terminal device, configuration information of each of then port groups;
• or receive, from the terminal device, configuration information of each of the n port groups;
• wherein the configuration information indicates at least one of a frequency domain granularity of phases and a frequency domain granularity of amplitudes of first linear combination coefficients of each port group, and a quantity of quantized bits of the phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each port group;
• and
• receive s first linear combination coefficient groups from the terminal device, wherein each first linear combination coefficient group comprises first linear combination coefficients of one of s port groups, at least one first linear combination coefficient group comprises at least two non-zero coefficients, the s first linear combination coefficient groups are used to determine a first precoding matrix, the s port groups are comprised in the n port groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.

An apparatus, comprising:

• one or more processors, and
• a computer-readable storage medium storing program instructions;
• wherein, when executed by the one or more processors, the instructions cause the apparatus to:
• receive signals from a base station using n port groups, wherein each of the n port groups comprises at least two ports, and n is a positive integer greater than or equal to 2;
• receive, from the base station, configuration information of each of the n port groups;
• or transmit, to the base station, configuration information of each of the n port groups,
• wherein the configuration information indicates at least one of a frequency domain granularity of phases and a frequency domain granularity of amplitudes of first linear combination coefficients of each port group, and a quantity of quantized bits of the phases and a quantity of quantized bits of the amplitudes of the first linear combination coefficients of each port group;
• and
• transmit s first linear combination coefficient groups to the base station, wherein each first linear combination coefficient group comprises first linear combination coefficients of one of s port groups, at least one first linear combination coefficient group comprises at least two non-zero coefficients, the s first linear combination coefficient groups are used to determine a first precoding matrix, the s port groups are comprised in the n port groups, s is a positive integer less than or equal to n, and s is a positive integer greater than or equal to 2.