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Channel correlation-based user group partition method under D2D

A channel correlation and user group technology, applied in the field of user group division based on channel correlation under D2D, to achieve the effect of high computational complexity

Active Publication Date: 2016-08-10
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] Aiming at the above defects or improvement needs of the prior art, the present invention provides a channel correlation-based user group division method under D2D, which aims to solve the problem of cellular The problem of group division based on channel-related information of network

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  • Channel correlation-based user group partition method under D2D

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0034] The single-cell heterogeneous co-frequency transmission writing system model in the embodiment is as follows figure 1 As shown, the base station side is equipped with a uniform linear array of large-scale antennas, the number of transmitting antennas is M>>1, and the number of user receiving antennas is 1; the cellular network adopts a two-step precoding scheme. After users are grouped, s...

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Abstract

The invention discloses a channel correlation-based user group partition method under D2D. The method comprises the following steps: (1) enabling users to measure a pilot frequency transmitted by a base station, and feeding back channel correlation matrixes and receiving signal intensities by means of an uplink; (2) obtaining the estimated positions of all the users according to an MUSIC (multiple-signal-classification) method and an RSS (receive-signal-strength) method, and adopting a binary group to indicate user positions; (3) carrying out clustering processing on the user by using a K-means method. The user group partition method provided by the invention can complete the partition of a two-step pre-coded user group of a cellular network and the discovery of a D2D cluster at the same time by utilizing cellular channel correlation matrix information, thus avoiding a complicated operation of directly utilizing channel correlation information to process medium and high-dimension matrix subspace division and projection; the method has the characteristics of being simple and efficient.

Description

technical field [0001] The present invention belongs to the technical field of wireless communication, and more specifically, relates to a method for dividing user groups based on channel correlation under D2D. Background technique [0002] With the development of communication technology, the wireless communication system will develop towards the direction of network integration, the purpose of which is to make comprehensive use of multiple wireless access technologies and multiple communication methods to improve spectrum efficiency and system capacity. Large-scale antenna systems and D2D systems are one of the hot technologies in the future. Large-scale antennas are suitable for cellular networks. As a supplement to cellular networks, D2D systems share the spectrum with cellular networks. When user terminals are relatively close, devices can Direct communication to reduce the load of the cellular network and reduce the end-to-end delay. The strategy of D2D devices can be...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/00H04W40/32H04B7/04
CPCH04B7/0413H04W4/70H04W40/32
Inventor 王德胜万晨夏鹏敏刘文旭
Owner HUAZHONG UNIV OF SCI & TECH
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