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Home base station imaginary multi-input and multi-output user matching method

A home base station and user pairing technology, which is applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., can solve the problems of SA method bit error rate performance degradation, channel correlation increase, etc., to prevent bit error rate performance Effects of rapid deterioration, improvement of average bit error rate, and prevention of rapid deterioration of BER performance

Inactive Publication Date: 2014-12-24
SOUTHEAST UNIV
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Problems solved by technology

But in the case of Femtocells, due to the small antenna spacing of Femtocell receivers, the channel correlation is greatly increased, leading to a decrease in the bit error rate performance of the SA method

Method used

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  • Home base station imaginary multi-input and multi-output user matching method
  • Home base station imaginary multi-input and multi-output user matching method
  • Home base station imaginary multi-input and multi-output user matching method

Examples

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Effect test

Embodiment 1

[0054] In the simulation scenario of Embodiment 1, there are 8 user mobile equipment UEs and 1 home base station. Each UE is configured with one antenna, and the home base station has two antennas. Properly pair UE antennas according to channel conditions to form virtual MIMO with home antennas. All UEs in the simulation scene are set to move at a low speed of 1m / s.

[0055] The simulated channel environment and link parameters are as follows: the channel uses a 7-path EPA model, the noise power is -3dB, and the polarization angle of the receiving antenna is (-45°, 45°). The subcarrier mapping method is centralized, using conventional CP, and each time slot contains 7 SC-FDMA symbols. The system bandwidth is 20MHz, 1MHz is reserved at both ends as a protection bandwidth, and the remaining 18MHz frequency band is allocated to UE. The subcarrier spacing in LTE is 15kHz, and each resource block contains 12 subcarriers in the frequency domain, so the UE can be allocated 100 res...

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Abstract

The invention discloses a home base station imaginary multi-input and multi-output user matching method including step 10, a first round antenna choosing, adopting a polling method to choose an antenna of a user as a first transmitting antenna from N users of a home base station and adding the first transmitting antenna to a matching antenna group, step 20: an I round antenna choosing: choosing an antenna of a user which does not join in the matching antenna group to join the matching antenna group and minimizing the increase of average bit error rate of users in the matching antenna group, step 30: comparing the number of the antennas Nq in the matching antenna group with the number of receiving antennas NR, if NR is bigger, carrying out step 40, if not carrying out step 50, step 40: comparing a growth rate of the average bit error rate eta (I )with a rise control ratio eta c , if eta (I ) is less than or equal to eta c, returning to step 20 for a 2+p round antenna choosing, if not carrying step 50, step 50: completing matching. Bit error rate performance can be improved by the method.

Description

technical field [0001] The present invention relates to the technical field of wireless communication reception, in particular, to a user pairing method for virtual multiple-input multiple-output of a home base station. Background technique [0002] According to a survey, more than 50% of voice services and more than 70% of data services occur in indoor environments, including homes, offices, cafes, and shopping malls. However, due to the penetration loss of the wall, it is difficult for the macro base station network to meet the needs of indoor communication. To solve this problem, home base station (femtocell) technology came into being. A home base station is also called a femtocell, and it is called a Home eNode B, or HeNB for short, in the Long Term Evolution (Long Term Evolution in English, LTE for short) system. Femtocell is a small, low-power base station with a coverage range of 10-50m. It is mainly used to solve indoor coverage problems. It has the characteristic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/02H04B7/04
Inventor 王捷徐晨陈俊邱洋帆
Owner SOUTHEAST UNIV
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