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Codebook subset limiting method
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A collection and precoding matrix technology, applied in radio transmission systems, network traffic/resource management, electrical components, etc., can solve problems such as waste of air interface resources, increase in field length, and increase in signaling
Active Publication Date: 2019-09-10
HUAWEI TECH CO LTD
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Therefore, multiple sets of bitmaps will greatly increase the length of the above fields, resulting in increased signaling and waste of air interface resources
Method used
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Embodiment approach 1
[0135] Embodiment 1: The at least one bit indicates at least two elements {b in the set B i0 ,b i1 …b ik},include:
[0136] The T 1 The x-th bit of bits indicates at least one element of said B; and / or said T 1 The y-th bit of the bits indicates at least two elements in said B; where x satisfies is an even number, y satisfies is odd, x and y are less than or equal to T 1 -1 non-negative integer, and the K 2 is less than T 1 positive integer of .
[0137] In one embodiment, T 1 =K 1 K 2 , the K 2 and K 1 All are positive integers. In yet another embodiment, K 1 =N 1 o 1 , K 2 =N 2 o 2 ,T 1 =N 1 o 1 N 2 o 2 , the N 1 , N 2 , O 1 , O 2 The meaning of is the same as that used when describing the precoding matrices (3) and (4) above, and will not be repeated here. to N 1 =8,N 2 = 1, O 1 = 4, O 2 =1 as an example, then T 1 =32,K 2 =1. At this time, the xth=0, 2, 4,..., 28, 30th bits indicate at least one element in the B, and the y=1, 3, 5,..., 2...
Embodiment approach 2
[0159] Embodiment 2: The at least one bit indicates at least two elements {b in the set B i0 ,b i1 …b ik},include:
[0160] The T 1 The x-th bit of the bits indicates at least 3 elements of said B; and / or
[0161] The T 1 the y-th bit of the bits indicates at least 4 elements in said B;
[0162] where x satisfies is an even number, y satisfies is odd, x and y are less than or equal to T 1 -1 non-negative integer, and the K 2 is less than T 1 positive integer of .
[0163] In one embodiment, T 1 =K 1 K 2 , the K 2 and K 1 All are positive integers. In yet another embodiment, K 1 =N 1 o 1 , K 2 =N 2 o 2 ,T 1 =N 1 o 1 N 2 o 2 , the N 1 , N 2 , O 1 , O 2 The meaning of is the same as that used when describing the precoding matrices (3) and (4) above, and will not be repeated here. to N 1 =8,N 2 = 1, O 1 = 4, O 2 =1 as an example, then T 1 =32,K 2 =1. At this time, the xth=0, 2, 4, ... 28, 30th bits indicate at least two elements in the B, a...
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Abstract
The invention discloses an indication mode of a bit field. A first field is determined, wherein the first field comprises T1 bits; wherein in the T1 bits, at least one bit indicates at least two elements {bi0, b1, b2} in a set B, at least one bit indicates at least one element {thetaj0, thetaj1... thetajh} in the set phi, and at least one element of the {bi0, bi1... Bik} and at least one element of the {j0, j1... Jh} are used for forming a precoding matrix; the set B={b0, b...,b<T2-1>}, wherein the elements in the set B are vectors with the length of N / 4, and the set phi={theta0, theta1,..., thetaS-1}. The elements in the phi are complex numbers of a unit amplitude; the 1th column of the pre-coding matrix W meets certain conditions; wherein the number of rows of W is N, the number of columns of W is R, N is larger than or equal to R, bkl is elements in the set B, thetapl is elements in the set phi, phil is the complex number of unit amplitude, T1, T2 and S are all positive integers, and T12,1 is larger than or equal to 0 and smaller than or equal to R-1.
Description
technical field [0001] The embodiments of the present invention relate to the communication field, and in particular to a method, device and system for indicating codebook restrictions. Background technique [0002] Generally, the signal transmission model of a wireless communication system can be based on the following mathematical formula: [0003] y=HWx+n [0004] Among them, x represents the signal to be transmitted, H represents the channel matrix, which is used to characterize the characteristics of the channel, and W is a precoding matrix, which is used to represent the data to be transmitted before the data to be transmitted is transmitted through the channel H. precoded matrix. n represents noise, and y represents a signal received at the receiving side. The precoding matrix W is usually determined through measurement and feedback. For example, the process of determining the precoding matrix of downlink data may be sent by the transmitting end with one or more re...
Claims
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Application Information
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