Abstract:
A method for determining a precoding matrix indicator, user equipment, and a base station are disclosed in embodiments of the present invention. The method includes: receiving a first reference signal set sent by a base station, where the first reference signal set is associated with a user equipment-specific matrix or matrix set; selecting a precoding matrix based on the first reference signal set, where the precoding matrix is a function of the user equipment-specific matrix or matrix set; and sending a precoding matrix indicator to the base station, where the precoding matrix indicator corresponds to the selected precoding matrix. In the embodiments of the present invention, CSI feedback precision can be improved without excessively increasing feedback overhead, thereby improving system performance.
Abstract:
Embodiments of the present invention provide a method for feeding back channel state information, a user equipment, and abase station, to improve feedback precision of channel state information. The method includes: receiving a reference signal sent by a base station; selecting a precoding matrix W from a codebook according to the reference signal, where a column vector of the precoding matrix W may be expressed as α[V ejϕv]T, v=[1 ejθ]; and sending a precoding matrix indicator PMI to the base station, where the PMI is corresponding to the selected precoding matrix W. The present invention may further improve quantization precision and achieve balance between overheads and the quantization precision. The base station performs precoding on a sent signal according to a fed back precoding matrix indicator, which can improve precoding precision, thereby improving a data transmission rate and system throughput.
Abstract:
A method for determining a precoding matrix indicator, user equipment, and a base station are disclosed in embodiments of the present invention. The method includes: receiving a first reference signal set sent by a base station, where the first reference signal set is associated with a user equipment-specific matrix or matrix set; selecting a precoding matrix based on the first reference signal set, where the precoding matrix is a function of the user equipment-specific matrix or matrix set; and sending a precoding matrix indicator to the base station, where the precoding matrix indicator corresponds to the selected precoding matrix. In the embodiments of the present invention, CSI feedback precision can be improved without excessively increasing feedback overhead, thereby improving system performance.
Abstract:
A method for determining a precoding matrix indicator, user equipment, and a base station are disclosed in embodiments of the present invention. The method includes: receiving a first reference signal set sent by a base station, where the first reference signal set is associated with a user equipment-specific matrix or matrix set; selecting a precoding matrix based on the first reference signal set, where the precoding matrix is a function of the user equipment-specific matrix or matrix set; and sending a precoding matrix indicator to the base station, where the precoding matrix indicator corresponds to the selected precoding matrix. In the embodiments of the present invention, CSI feedback precision can be improved without excessively increasing feedback overhead, thereby improving system performance.
Abstract:
Embodiments of the present invention relate to a method and an apparatus for feeding back a CSI-RS resource combination, a user equipment, and a base station. The method includes: acquiring information of a CSI-RS resource combination; determining a candidate CSI-RS resource combination according to the information of the CSI-RS resource combination, and performing a joint CSI measurement according to one or more sets of CSI-RS resources in the candidate CSI-RS resource combination, so as to select a CSI-RS resource combination according to a measurement result of the joint CSI measurement; and feeding back the selected CSI-RS resource combination and the measurement result of the joint CSI measurement corresponding to the selected CSI-RS resource combination to a base station.
Abstract:
The present disclosure discloses a method, a user equipment and a base station for determining a PMI. The method includes: receiving a reference signal set sent by a base station; based on the reference signal set, selecting a precoding matrix from a codebook, the codebook at least including a non-constant modulus precoding matrix, the non-constant modulus precoding matrix at least including a non-constant modulus column vector, amplitude values of at least two elements of the non-constant modulus column vector forming a symmetrical sequence; and sending a PMI to the base station, the PMI corresponding to the selected precoding matrix. According to the method, the user equipment and the base station for determining PMI, because the non-constant modulus precoding matrix included in the adopted codebook can adjust the shape of a beam, antennas may focus power on a hotspot region, and thus a load balance may be effectively realized.
Abstract:
A waterproof optical fiber connector includes a flange and a terminal connector. The terminal connector includes an outer casing, an inner casing, an optical fiber and a connecting component coupled with the fiber. The inner casing is tubular for housing the fiber and the connecting component. The outer casing is tubular for housing the inner casing. The inner casing includes a body and a waterproof clip connected to a back end of the body. The fiber passes through the clip. The tail of the inner wall of the outer casing tapers from the front to the back, pressing the clip inwards such that the clip and the fiber are fixed together. At least one first protrusion is provided on the inner surface of the front end of the sleeve of the flange, and the front end of the body of the inner casing bears against the first protrusion.
Abstract:
The embodiments of the present invention provide a plug and a power connector. The plug is applied in a power connector connected between a power supply device and a radio frequency module. The plug includes a jack and a crimping component set at a tail end of the jack, and the crimping component is configured to connect a power cable introduced from the power supply device to the jack in a manner of fixing. A power connector that includes the plug is further provided. By using the technical solutions according to the embodiments, easy on-site installation of the power connector that includes the plug during use may be ensured.
Abstract:
The present disclosure relates to communication methods and communication apparatus. One example method includes determining a quantity and a position of control channel element (CCE) used by a control channel of user equipment, where each of the CCE corresponds to a plurality of resource element groups (REGs), the plurality of REGs form at least one REG bundle, and any REG bundle in the at least one REG bundle includes a plurality of resource blocks (RBs) that are consecutive or adjacent in at least one of time domain or frequency domain, and receiving, from a network device, the control channel by using the CCE.
Abstract:
A network device sends a first physical channel to user equipment on resources of one or more candidate physical channels. Correspondingly, the user equipment monitors one or more candidate physical channels in a candidate physical channel set, to receive the first physical channel on the resources of the one or more candidate physical channels. A payload of the first physical channel includes control information and a transport block, the control information includes first information, the first information is used to indicate an acknowledgment resource to the user equipment, and the acknowledgment resource is a resource used by the user equipment to send acknowledgment information to the network device. After receiving the first physical channel, the user equipment sends the acknowledgment information to the network device on the acknowledgment resource; and correspondingly, the network device receives the acknowledgment information on the acknowledgment resource.