Device and method for determining modulation and coding scheme based on channel capacity

A receiving device, comprising:

• a channel estimation circuit, for receiving a plurality of reference signals to generate a plurality of channel estimates according to the plurality of reference signals;
• an eigenvalue computation circuit, coupled to the channel estimation circuit, for generating at least one eigenvalue corresponding to the plurality of channel estimates according to the plurality of channel estimates;
• a channel compensation circuit, coupled to the eigenvalue computation circuit, for generating a correlation compensation value for compensating the plurality of channels according to the at least one eigenvalue received from the eigenvalue computation circuit;
• a channel capacity computation circuit, coupled to the eigenvalue computation circuit and the channel compensation circuit, for generating a channel capacity according to the at least one eigenvalue received from the eigenvalue computation circuit and the correlation compensation value received from the channel compensation circuit;
• and
• a selection circuit, coupled to the channel capacity computation circuit, for determining a modulation and coding scheme (MCS) according to the channel capacity;
• wherein the selection circuit generates a bit efficiency according to the channel capacity, and the selection circuit determines the MCS according to the bit efficiency such that a block error rate (BLER) of the receiving device satisfies a predetermined BLER.