CPC H04B 7/0456 (2013.01) [H04B 7/0639 (2013.01); H04W 72/0453 (2013.01); H04W 72/23 (2023.01)] | 20 Claims |
1. A communications apparatus, comprising:
a receiver, configured to receive downlink control information from a network device, wherein the downlink control information comprises a resource allocation information indicator field, a transmission layer quantity indicator field, and a transmission precoding matrix indicator field corresponding to a subband of at least one subband, the resource allocation information indicator field is used to indicate a resource scheduled for uplink, the resource corresponds to the at least one subband, the transmission layer quantity indicator field is used to indicate an uplink transmission layer quantity, and the transmission precoding matrix indicator field corresponding to the at least one subband is used to indicate an uplink transmission precoding matrix corresponding to the at least one subband; and
a processor, configured to determine a bit quantity of the transmission precoding matrix indicator field corresponding to the at least one subband, wherein the bit quantity of the transmission precoding matrix indicator field corresponding to the at least one subband is not greater than a preset total bit quantity of the transmission precoding matrix indicator field, a sum of bit quantities of all transmission precoding matrix indicator fields corresponding to all subbands is not greater than the preset total bit quantity, and the bit quantity of the transmission precoding matrix indicator field corresponding to the at least one subband is related to a quantity of subbands corresponding to the resource scheduled for uplink; and determine the uplink transmission precoding matrix corresponding to the at least one subband based on the bit quantity of the transmission precoding matrix indicator field corresponding to the at least one subband and the uplink transmission layer quantity.
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