Channel information feedback method, pilot frequency and wave beam transmitting methods, systems and devices
A channel information and transmission method technology, applied in the field of channel information feedback, can solve the problems of high overhead, difficult performance, and difficult implementation.
Inactive Publication Date: 2014-12-10
ZTE CORP
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Problems solved by technology
It is mainly reflected in the following aspects: the pilot overhead will increase with the increase of the number of antennas. In addition, since the traditional codebook feedback technology is used for feedback, the codebook used needs to contain a lot of codewords, and the number of codewords The selection is very difficult, which increases the complexity of the terminal and is difficult to implement; the overhead of codebook feedback is very large, resulting in huge overhead for the uplink
It is difficult to obtain better performance in large-scale antenna systems using codebook feedback technology
[0008] To sum up, for large-scale antenna systems, the efficiency and complexity of channel information feedback are important technical issues. At present, there is no effective method to improve the efficiency of channel information feedback and reduce the complexity of feedback, which seriously affects Industrial Applicability of Massive MIMO
Method used
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[0106] In order to understand the characteristics and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present invention.
[0107] figure 1 It is a schematic flow chart of the channel information feedback method in Embodiment 1 of the present invention. The channel information feedback method in this example is applied to the channel information feedback system, such as figure 1 As shown, the channel information feedback method in this example includes the following steps:
[0108] Step 101: the base station transmits M types of pilot signals, and the M types of pilot signals respectively correspond to M pilot ports.
[0109] Here, M is an integer greater than 1, for example, M is 64.
[011...
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The invention discloses a channel information feedback method, pilot frequency and wave beam transmitting methods, systems and devices. The channel information feedback method comprises the steps that a base station transmits M types of pilot frequency signals, wherein the M types of pilot frequency signals are respectively corresponding to M pilot frequency ports; according to signals, N pilot frequency ports of the M pilot frequency ports are configured for a terminal by the base station, wherein M is a positive integer and N is a positive integer less than M; the terminal receives and detects pilot signals of the N pilot frequency ports; and according to the quality of the received signals, K pilot frequency ports are selected from the N pilot frequency ports, and the information of a channel formed by the K pilot frequency ports and the terminal is fed back, wherein K is a positive integer less than N.
Description
technical field [0001] The invention relates to channel information feedback technology in communication, in particular to a channel information feedback method, a pilot frequency and beam sending method, system and device. Background technique [0002] In a wireless communication system, the sending end and the receiving end adopt a spatial multiplexing method and use multiple antennas to obtain a higher data transmission rate. Compared with the general spatial multiplexing method, an enhanced spatial multiplexing method is to feed back channel information to the sending end through the receiving end, and the sending end uses the transmission precoding technology to transmit data according to the obtained channel information, which can greatly improve the transmission efficiency. performance. For single-user MIMO (Multi-Input Multi-Output), channel feature vector information is directly used for precoding; for multi-user MIMO, more accurate channel information is required....
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IPC IPC(8): H04B7/06
CPCH04B7/061H04B7/0695H04B7/088H04B7/0417H04W72/21H04W72/23H04B7/0452H04B7/046H04L5/0051H04W72/02H04W72/046
Inventor 陈艺戬鲁照华赵晶肖华华郁光辉
Owner ZTE CORP