CHANNEL INFORMATION FEEDBACK METHOD, CHANNEL INFORMATION DETERMINING METHOD, RECEIVE-END DEVICE, AND TRANSMIT-END DEVICE
FIG6 is a schematic diagram of a logical structure of a transmit end device according to an embodiment of the present invention
FIG6 is a schematic diagram of a logical structure of a transmit end device 600 according to an embodiment of the present invention. As shown in FIG6, the device 600 includes a receiving module 602 and a determining module 604.
schematic diagram
704
transceiver
712
bus
710
interface
7044
receiver
7084
data
706
antennas
600
device
708
memory
702
processor
604
determining module
602
receiving module
7042
transmitter
7082
instruction
700
device
['3. A receive end device (500), comprising: a generation module (502), configured to generate at least one piece of description  information for each of a plurality of subbands comprised in a wideband, wherein each piece of description information is used to describe a description vector of a channel matrix corresponding to the subband, each piece of the description information comprises at least one of a vector parameter and a weighting parameter, the vector parameter is used to indicate at least two component vectors of the description vector, the weighting parameter is used to indicate a weight of each of the at least two component vectors, and the at least two component vectors are selected from a base codebook; and a sending module (504), configured to send the at least one piece of description information, wherein the base codebook comprises a plurality of basic vectors, each component vector is one of the plurality of basic vectors, and the basic vector is:  c x,y  =  v x  ⊗  u y , wherein  v x = 1 e j 2 πx O 1 N 1 ⋯ e j 2 πx O 1 N 1 N 1 − 1   u y = 1 e j 2 πy O 2 N 2 ⋯ e j 2 πy O 2 N 2 N 2 − 1  wherein ( x, y ) represents a basic vector parameter,  O 1 ,  N 1 ,  O 2  and  N 2  are preset positive integers, 0 ≤ x ≤  O 1 N 1  - 1, and 0 ≤  y  ≤  O 2 N 2  - 1, the at least two component vectors comprise a starting vector and at least one offset vector,  characterized in that  the vector parameter comprises a basic vector parameter ( l ,  m ) of the starting vector, an offset step ( L ,  M ), and an offset parameter ( a ,  b ) of each offset vector, a basic vector parameter of each offset vector is ( l + aL ,  m + bM ), the offset step ( L ,  M ) is one of a plurality of preset groups of offset steps, 1 ≤  L  ≤  O 1 ,1 ≤  M  ≤  O 2 , 0 ≤  l  ≤  O 1 N 1  - 1, 0 ≤  m  ≤  O 2 N 2  - 1,  0 ≤ a ≤ O 1 N 1 − 1 − l L ,   0 ≤ b ≤ O 2 N 2 − 1 − m M ,  and  a  and  b  are both integers and are not 0 at the same time; and the offset step ( L ,  M ) is an offset step corresponding to the basic vector parameter ( l ,  m)  of the starting vector in the plurality of preset groups of offset steps.', '4. A transmit end device (600), comprising: a receiving module (602), configured to receive at least one piece of description information generated for each of a plurality of subbands comprised in a wideband, wherein each piece of description information is used to describe a description vector of a channel matrix corresponding to the subband, each piece of the description information comprises at least one of a vector parameter and a  weighting parameter, the vector parameter is used to indicate at least two component vectors of the description vector, the weighting parameter is used to indicate a weight of each of the at least two component vectors, and the at least two component vectors are selected from a base codebook; and a determining module (604), configured to determine, based on each piece of description information, the description vector corresponding to the description information, wherein the base codebook comprises a plurality of basic vectors, each component vector is one of the plurality of basic vectors, and the basic vector is:  c x,y  =  v x  ⊗  u y , wherein  v x = 1 e j 2 πx O 1 N 1 ⋯ e j 2 πx O 1 N 1 N 1 − 1   u y = 1 e j 2 πy O 2 N 2 ⋯ e j 2 πy O 2 N 2 N 2 − 1  wherein ( x ,  y ) represents a basic vector parameter,  O 1 ,  N 1 ,  O 2  and  N 2  are preset positive integers, 0 ≤  x  ≤  O 1 N 1  -1, and 0 ≤  y  ≤  O 2 N 2  - 1, the at least two component vectors comprise a starting vector and at least one offset vector,  characterized in that  the vector parameter comprises a basic vector parameter ( l ,  m ) of the starting vector, an offset step ( L ,  M ), and an offset parameter ( a ,  b ) of each offset vector, a basic vector parameter of each offset vector is ( l + aL ,  m + bM ), the offset step ( L ,  M ) is one of a plurality of preset groups of offset steps, 1 ≤  L  ≤  O 1 ,1 ≤  M  ≤  O 2 , 0 ≤  l  ≤  O 1 N 1  - 1, 0 ≤  m  ≤  O 2 N 2  - 1,  0 ≤ a ≤ O 1 N 1 − 1 − l L ,   0 ≤ b ≤ O 2 N 2 − 1 − m M ,  and  a  and  b  are both integers and are not 0 at the same time; and the offset step ( L ,  M ) is an offset step corresponding to the basic vector parameter ( l ,  m)  of the starting vector in the plurality of preset groups of offset steps.']