Single stream and double stream switching method based on effective speed for use in beam forming

A beamforming, single-dual-stream technology, applied in the field of single-dual-stream switching based on effective rate, can solve problems such as low data rate, inability to ensure the target rate of user transmission rate, inability to ensure user fairness, etc., to achieve capacity expansion. Effect

Active Publication Date: 2015-12-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of low data rate of single-stream or dual-stream beamforming transmission in the prior art, the inability to en...

Method used

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  • Single stream and double stream switching method based on effective speed for use in beam forming
  • Single stream and double stream switching method based on effective speed for use in beam forming
  • Single stream and double stream switching method based on effective speed for use in beam forming

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specific Embodiment approach 1

[0022] Specific implementation mode 1: A single-dual-stream switching method based on effective rate in beamforming in this implementation mode is specifically prepared according to the following steps:

[0023] For the single-stream and multi-stream hybrid transmission scenario under multi-user beamforming, select the appropriate number of transmission streams for each user in this scenario according to the user's channel quality and rate requirements, and complete the process according to the stream number and channel conditions of different users The allocation of multiple users on the RB realizes switching between single and dual streams based on the effective rate;

[0024] Step 1, utilize the system channel feedback to obtain the user's channel information; Assume that there are K users in the single cell of the LTE mobile cellular communication system, and each user is equipped with N r root receiving antennas, the cell base station is equipped with N t The calculation...

specific Embodiment approach 2

[0033] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is: in step two, use Calculate channel norm Compare channel norms and threshold H 0 OK in all N r Select the number of receiving antennas actually used by user k in the nth resource block in the root receiving antenna according to The specific process of determining the actual receiving antenna used is:

[0034] 1) In addition to the user's channel information, the rate requirement is also an important criterion for determining the number of streams; use r_remain k,n (t) to characterize the user's rate requirements:

[0035] r _ remain k , n ( t ) = t × λ k - ( t - 1 ...

specific Embodiment approach 3

[0052] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step three, the corresponding relationship ρ between the user k and RBn of the actually used receiving antenna is established k,n Specific process:

[0053] Step 2 has completed the determination of the number of user streams and the determination of the antenna space, but the determination of the number of streams only indicates the transmission mode to be adopted when user k is allocated to RBn, and whether user k will actually be allocated It is uncertain to RBn. In the process of user k selection, the problem of user combination on different RBs must be solved, so as to complete a relatively complete scheduling process by combining the results of flow number determination in step 2; in order to select Small user combination, we will continue to use the concept of spatial correlation coefficient in user selection, the difference is that here is used to ev...

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Abstract

The invention discloses a single stream and double stream switching method based on an effective speed for use in beam forming, relates to a single stream and double stream switching method, and aims to solve the problems that a data transmission speed in single-stream or double-stream beam forming is low, the fairness among users cannot be ensured, and transmission speeds of specific users cannot reach a target speed. The method is implemented by the following steps: I, acquiring a channel matrix defined in the description of all receiving antennas when a user k is on RBn through feedback information of the user k; II, selecting a number defined in the description of the receiving antennas actually used by the user k on an nth resource block, and determining the actually-used receiving antennas according to the number defined in the description; III, establishing a corresponding relation rho<k, n> between the user k of the actually-used receiving antennas and the RBn; and IV, calculating an effective speed defined in the description by the corresponding relation rho<k, n> between the user k of the actually-used receiving antennas and the RBn. The method is applied to the field of single stream and double stream switching.

Description

technical field [0001] The invention relates to a single-dual-stream switching method, in particular to a single-dual-stream switching method based on an effective rate in beamforming. Background technique [0002] In recent years, under the background of LTE, wireless communication has developed by leaps and bounds. With the rapid increase of smartphone users, the demand for multimedia services in wireless communication continues to increase. In order to provide users with a better experience, MIMO technology is introduced. MIMO technology is one of the core technologies first proposed by LTE. It uses multiple antennas on the receiver and transmitter combined with some advanced signal processing techniques. MIMO technology can be used to obtain improved system performance, including increasing system capacity (single cell supports more users) and expanding cell coverage, as well as improving services provided, such as increasing single-user data rate, etc. Multi-antenna...

Claims

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Application Information

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IPC IPC(8): H04W16/28H04B7/06H04B7/04
CPCH04B7/0417H04B7/061H04B7/0617H04B7/0619H04B7/063H04W16/28
Inventor 吴宣利马哲明李卓明韩杏玲张佳俊
Owner HARBIN INST OF TECH
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