Precoding matrix index feedback method and costumer equipment
A precoding matrix and user equipment technology, applied in the field of communication, can solve the problem of reducing the total feedback overhead and achieve the effect of small signaling overhead and easy implementation
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example 1
[0140] Example 1: According to the codebook design method of method (1), W1 represents a kind of frequency non-selectivity, so the feedback based on broadband should be used, that is, only one W1 is fed back on the system bandwidth, and there is no need for each subband. feedback. For W2, it is decomposed into a frequency selective part and a frequency nonselective part. In some communication scenarios (such as: the number of scatterers scattered in the channel is less than 10 (such as suburban communication environment, etc.), user equipment moves at low or high speed (less than or equal to 10km / h or greater than 30km / h)), the W2 The frequency non-selective part is the beam selection part, that is, the code word value of W2; the frequency selective part of W2 is the phase combining part, that is, the code word form of W2. The above decomposition method of W2 is called the first solution of the present invention. For example, when RI=1, the codebook of W2 contains 16 codewor...
example 2
[0153] Example 2: According to the codebook design method of method (1), W1 represents a kind of frequency non-selectivity, so the feedback based on broadband should be used, that is, only one W1 is fed back on the system bandwidth, and there is no need for each subband. feedback. For W2, it is decomposed into a frequency selective part and a frequency nonselective part. In some communication scenarios (such as: the number of scatterers scattered in the channel is less than 10 (such as suburban communication environment, etc.), user equipment moves at low or high speed (less than or equal to 10km / h or greater than 30km / h)), the W2 The frequency non-selective part is the beam selection part, that is, the code word value of W2; the frequency selective part of W2 is the phase combining part, that is, the code word form of W2. The above decomposition method of W2 is called the first solution of the present invention. For example, when RI=3, the codebook of W2 contains 16 codewor...
example 3
[0164] Example 3: According to the codebook design method of method (1), W1 represents a kind of frequency non-selectivity, so the feedback based on broadband should be used, that is, only one W1 is fed back on the system bandwidth, and there is no need for each subband. feedback. For W2, it is decomposed into a frequency selective part and a frequency nonselective part. In some communication scenarios (such as: the number of scatterers scattered in the channel is less than 10 (such as suburban communication environment, etc.), user equipment moves at low or high speed (less than or equal to 10km / h or greater than 30km / h)), the W2 The frequency non-selective part is the beam selection part, that is, the code word value of W2; the frequency selective part of W2 is the phase combining part, that is, the code word form of W2. The above decomposition method of W2 is called the first solution of the present invention. For example, when RI=1, the codebook of W2 contains 16 codewor...
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