Pilot optimization method for compression sensing channel estimation of large-scale MIMO system
A compressed sensing and channel estimation technology, applied in transmission systems, digital transmission systems, radio transmission systems, etc., to achieve the effect of improving performance and reducing mean square error
Inactive Publication Date: 2017-09-15
NANJING UNIV OF POSTS & TELECOMM
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A large number of transmitting antennas in the base station cause limited local scattering
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The invention discloses a pilot optimization method for compression sensing channel estimation of a large-scale MIMO system. A part of Fourier matrixes can be used as pilot matrixes; a minimum cross-correlation criterion is taken as the starting point; a pilot matrix optimization problem is modelled as a combined optimization problem; then, the combined optimization problem is solved by utilization of a genetic algorithm GA; and thus, an optimized pilot matrix having the minimum cross-correlation value is obtained. By means of the pilot optimization method disclosed by the invention, the fact that large-scale MIMO downlink channel estimation based on compression sensing has relatively low mean square error MSE can be ensured; and thus, the channel estimation performance can be improved.
Description
Pilot Optimization Method for Compressed Sensing Channel Estimation in Massive MIMO Systems technical field The invention relates to the technical field of pilot-aided channel estimation and pilot design in a communication system, in particular to a pilot optimization method for compressed sensing channel estimation in a massive MIMO system. Background technique In modern wireless communications, the degree of freedom of massive MIMO systems increases, and the diversity and multiplexing gains brought by multiple antennas can significantly improve spectral efficiency and energy efficiency. In order for the base station to obtain the spatial multiplexing gain and the array gain, the base station transmitting end or the user receiving end needs to know channel state information (CSI, channel state information), which needs to be obtained through channel estimation. One challenge of the FDD massive MIMO system is that the number of pilots increases linearly with the number of ...
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IPC IPC(8): H04L5/00H04L25/02H04B7/0413
Inventor 何雪云高露
Owner NANJING UNIV OF POSTS & TELECOMM
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