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Pilot frequency distribution method based on user signal arrival angle

A pilot frequency allocation and user technology, which is applied in the field of communication systems, can solve the problems of imperfect channel state information and excessive pilot frequency overhead, and achieve the effect of saving pilot frequency overhead and improving reachability and speed.

Active Publication Date: 2019-11-26
CHONGQING UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the traditional pilot allocation method has the problems of excessive pilot overhead and imperfect channel state information

Method used

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  • Pilot frequency distribution method based on user signal arrival angle
  • Pilot frequency distribution method based on user signal arrival angle
  • Pilot frequency distribution method based on user signal arrival angle

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with accompanying drawing and specific embodiment:

[0030] A pilot allocation method based on user signal angle of arrival of the present invention includes:

[0031] S1: Assume that there are L hexagonal cells closely arranged, each cell has K users, and the angles are equally spaced in each cell, the base station is located in the center of each cell and M antennas are deployed, and M>K is satisfied; the target cell Located in the center, there are 6 first-level cells and 12 second-level cells on the periphery. They are divided into different sectors according to the angle at which each user arrives at the base station. Assume that each cell can be divided into 6 sectors. The base station receives the signal The angles of arrival of do not overlap each other;

[0032] S2: Divide all pilots into 6 mutually orthogonal groups

[0033] S3: Randomly select two groups from the 6 groups of pilots for...

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Abstract

The invention discloses a pilot frequency distribution method based on a user signal arrival angle, which divides users into different sectors, distributes orthogonal pilot frequencies in the sectorsand multiplexes pilot frequencies among the sectors according to different arrival angles of the users in the direction of arriving at a base station so as to achieve the purposes of saving pilot frequency overhead and improving the reachable sum rate of the users.

Description

technical field [0001] The present invention relates to the technical field of communication systems, in particular to a method for allocating pilots based on angle of arrival of user signals. Background technique [0002] With the advent of the era of big data and the Internet of Things, the interaction of information is not only the Internet mode, but also the sharing of information between terminal devices and the in-depth analysis of dense data. After 5G is put into commercial use, both will show explosive growth. The increase in the number of terminal devices is mainly reflected in the fields of smart home, Internet of Vehicles, and smart manufacturing; the increase in data sets is mainly reflected in cloud services, virtual reality, and ultra-high-definition video. Image transmission and other fields. Faced with so many terminal devices and high-intensity data flows, the requirements for 5G are quite high, and a network with a larger system capacity must be sought for...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04B7/0413
CPCH04W72/0453H04B7/0413Y02D30/70
Inventor 吴玉成李亮杨忠熊灿云余海飞刘统
Owner CHONGQING UNIV