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A millimeter wave MIMO channel estimation method based on a MUSIC algorithm and precoding

A millimeter wave, pre-coding technology, applied in baseband system components, radio transmission systems, electrical components, etc.

Active Publication Date: 2019-06-07
COMMUNICATION UNIVERSITY OF CHINA
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Problems solved by technology

Obviously, ULA can only provide one-dimensional (1-d) information of CSI

Method used

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  • A millimeter wave MIMO channel estimation method based on a MUSIC algorithm and precoding
  • A millimeter wave MIMO channel estimation method based on a MUSIC algorithm and precoding
  • A millimeter wave MIMO channel estimation method based on a MUSIC algorithm and precoding

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Embodiment Construction

[0061] The estimation performance of the proposed channel estimation method is evaluated by simulation results. Consider mmWave communication channels with L-shaped arrays and planar arrays.

[0062] where N in the L-shaped array Lx =N Ly =32,N LT =N LR =32+32-1=63; in the planar array, N Px =N Py =8,N PT =N PR =64. path gain SNR The rest of the conditions are set to be the same for both arrays. where at the transmitter M t = 4RF, at the receiving end M r = 4RF, and d = λ / 2. A uniform sampling grid is adopted in the angular space [0°, 60°] in the azimuth and elevation directions, and the grid resolution is 0.05°. Assume that the power is evenly distributed on all paths, and set the number of paths=1 and 3. For the following simulation results, the directions of the channels are assumed to be (10.05°, 15.20°) and (12.15°, 17.10°). And the simulation results prove the feasibility of the scheme. The performance in multiple orientations is then evaluated, and th...

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Abstract

The invention discloses a millimeter wave MIMO channel estimation method based on a MUSIC algorithm and precoding, and the method comprehensively considers the influence of azimuth angle and pitch angle parameters, employs an innovative scheme, and employs a classical MUSIC method to estimate the CSI in an L-shaped array and a UPA. Under the same condition, the channel estimation performance basedon the L-shaped array is superior to that of the UPA. Because there are few methods for researching two-dimensional channel estimation, a channel estimation scheme based on beam training and a channel estimation scheme based on OMP are adopted in the ULA system to carry out performance comparison. Due to the fact that estimation errors of the azimuth angle and the elevation angle can cause normalization mean square errors, under the same condition, the NMSE performance of the UPAs should be higher than that of the ULA. Simulation results show that the proposed method can effectively estimatethe channel state information in the two arrays, even better than the prior art.

Description

technical field [0001] The invention relates to a millimeter wave MIMO channel estimation method based on MUSIC algorithm and precoding, and belongs to the technical field of wireless local area network communication. Background technique [0002] The mmWave frequency band has great potential for wireless local area networks and fifth-generation (5G) cellular networks, which can provide high data rates. However, the path fading of mmWave limits the transmission distance and reduces the coverage performance, requiring the application of massive MIMO technology to obtain sufficient signal power to increase the communication distance. Utilizing the spatial sparseness of the mmWave MIMO channel, the channel can be estimated by estimating the path direction and path gain instead of the traditional estimation of the MIMO channel matrix. [0003] There have been many research methods on channel estimation. The first method belongs to the beam training method, which searches in the...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04B7/0456
Inventor 李树锋曹广静金立标
Owner COMMUNICATION UNIVERSITY OF CHINA
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