Method and device for determining precoding, method and device for detecting data, storage medium and electronic device

A method for determining precoding, comprising:

• transmitting, by a second communication node to a first communication node, a precoding matrix indicator (PMI), wherein:
• the PMI and a precoding parameter are used to determine a precoding matrix used on a control channel accordingly, the precoding parameter comprising at least one of:
• a PMI delay, a number of repetitions of the control channel, an aggregation level of the control channel, a candidate resource of the control channel, a starting physical resource block (PRB) sequence number of the control channel, a repetition resource group of the control channel, or a PRB set of the control channel;
• in response to the number of repetitions of the control channel being less than or equal to a repetition number threshold, a precoding matrix used on all repetition subframes of the control channel is a precoding matrix corresponding to a latest PMI sent by the second communication node;
• and
• in response to the number of repetitions of the control channel being greater than the repetition number threshold, a predefined precoding matrix is used on all repetition subframes of the control channel.

An electronic device, comprising a memory and a processor, wherein the memory is configured to store a computer program, and the processor is configured to execute the computer program to perform steps comprising:

• receiving, by a first communication node, a precoding matrix indicator (PMI) sent by a second communication node;
• and
• determining a precoding matrix used on a control channel according to the PMI and a precoding parameter, wherein the precoding parameter comprises at least one of:
• a PMI delay, a number of repetitions of the control channel, an aggregation level of the control channel, a candidate resource of the control channel, a starting physical resource block (PRB) sequence number of the control channel, a repetition resource group of the control channel, or a PRB set of the control channel;
• determining, by the first communication node, a repetition number threshold;
• in response to the first communication node determining that the number of repetitions of the control channel is less than or equal to the repetition number threshold, determining, by the first communication node, that a precoding matrix used on all repetition subframes of the control channel is a precoding matrix corresponding to a latest PMI sent by the second communication node;
• and
• in response to the first communication node determining that the number of repetitions of the control channel is greater than the repetition number threshold, using, by the first communication node, a predefined precoding matrix on all repetition subframes of the control channel.