Method for channel feedback transmission
A technology of channel feedback and transmission method, which is applied in the direction of transmission system, digital transmission system, radio transmission system, etc., can solve the problems of large amount of channel feedback, large wireless transmission overhead, and low system performance, so as to improve efficiency, performance balance, Effect of Channel Feedback Transmission Overhead Balance
Active Publication Date: 2016-03-30
HUAWEI TECH CO LTD
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[0004] However, in the scenario of dense networking and high-power coverage, OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) physical layer bearer is used in the prior art. Due to the large amount of channel feedback, the wireless transmission overhead is very high. large, making the system performance lower
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[0095] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0096] Such as figure 1 As shown, the figure 1 It is a communication system based on dense wireless coverage, in which there are no cells and sectors centered on base stations, because there is a large overlap between the coverage areas of base stations. In this communication system, signals between cells may interfere with each other. In order to eliminate and suppress interference more accurately, accurate estimation and feedback of the channel state are require...
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The invention relates to the field of communication, specifically to a method for channel feedback transmission. A terminal performs channel estimation on a subcarrier with downlink pilot frequency, and obtains first channel information; the terminal performs channel interpolation calculation on a channel of the data subcarrier according to the first channel information, and obtains second channel information according to a result of the channel interpolation calculation; the terminal determines a feedback factor; the terminal obtains third channel information from the second channel information according to the feedback factor, and the amount of the third channel information is smaller than that of the second channel information; and the terminal feeds back the third channel information to a base station. Through the feedback factor, part of channel information is selected to be fed back, so that a balance is achieved between communication system performance and channel feedback transmission overheads, and the efficiency of a communication system is improved.
Description
technical field [0001] The invention relates to the communication field, in particular to a channel feedback transmission method. Background technique [0002] The wireless communication network has undergone four generations of evolution, and its evolutionary technical route is: from macro-site macro-cellular networking to micro-site micro-cellular networking to high-power intensive networking. Regardless of the networking mode, signal interference between different cells is always a problem that needs to be dealt with. [0003] Based on the above technical route, in a wireless communication system with high-power intensive networking, there are no cells and sectors centered on the base station, because different base stations may overlap in signal coverage areas. Therefore, the user will be covered by multiple base stations. With the cooperation of these base stations, the signal power can be significantly improved, but there is also a lot of interference. For interferen...
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IPC IPC(8): H04L25/02H04L1/00H04W28/04
CPCH04B7/0658H04L1/0026H04L1/0029H04W72/21H04W72/52
Inventor 吴涛吕林军
Owner HUAWEI TECH CO LTD