Interference elimination method based on scheduling and two-stage interference alignment
A technology for interference alignment and interference cancellation, applied in the directions of space transmit diversity, electrical components, diversity/multi-antenna systems, etc.
Active Publication Date: 2014-02-19
XIDIAN UNIV
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[0005] The purpose of the embodiments of the present invention is to provide an interference elimination method based on scheduling and two-stage interference alignment, aiming at proposing a new two-stage interference alignment method according to the characteristics of heterogeneous networks, and combining link scheduling to solve the problem in heterogeneous networks. downlink interference
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[0059] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0060] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0061] Such as figure 1 As shown, the interference cancellation method based on scheduling and two-stage interference alignment in the embodiment of the present invention includes the following steps:
[0062] S101: each user measures the average path gain from each base station to itself, and feeds back to the respective base station;
[0063] S102: the smallcell base station sends the information to the macro base station, and the macro base station performs ...
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The invention discloses an interference elimination method based on scheduling and two-stage interference alignment. The average path gain from base stations to users are measured by the users, and the average path gain is fed back to the base stations; a smallcell base station sends information to a macro base station, and the macro base station carries out downlink transmission link scheduling; according to a link scheduling result, the two-stage interference alignment is executed to obtain a sending beam forming matrix of a scheduled base station; the scheduled base station sends data to the users by means of the constructed sending beam forming matrix; the users design a receiving beam forming matrix, interference is eliminated, and the data are received. According to the interference elimination method, heterogeneous network resources are sufficiently utilized, as many links as possible can carry out transmission in each time slot at the same time through link scheduling, the two-stage interference alignment is utilized to eliminate cross-layer interference and same-layer interference between scheduled links, and utilization efficiency of frequency spectrum resources are effectively promoted.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an interference elimination method based on scheduling and two-stage interference alignment. Background technique [0002] With the rapid growth of wireless users' demand for mobile services, how to provide users with ubiquitous high-speed data access services is becoming an important issue faced by wireless communications. Existing studies have shown that by deploying small cells, such as microcells, picocells, and femtocells, in hot spots and coverage blind spots in macrocells, the utilization efficiency of spectrum resources can be effectively improved, thereby increasing the capacity of wireless cellular networks. However, in this heterogeneous network, the smallcell and the macrocellular network reuse the same spectrum resources, which leads to serious interference problems in the heterogeneous network. [0003] There are two types of interference...
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IPC IPC(8): H04W36/20H04W36/04H04B7/06
Inventor 盛敏刘国庆王玺钧张琰史琰焦万果马骁王亮
Owner XIDIAN UNIV