Patent
FDD large-scale MIMO downlink channel reconstruction and multi-user transmission method
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TLDR
In this article, the authors proposed a downlink channel reconstruction and multi-user transmission method for FDD large-scale MIMO system with low cost, and realized downlink multiuser interference-free data transmission with high throughput.Abstract:
The invention discloses a downlink channel reconstruction and multi-user transmission method for FDD large-scale MIMO system. The method comprises the following steps: transmitting an uplink pilot frequency by a user to a base station; pilots between users are orthogonal; the base station extracts the directional angles and time delays of all propagation paths in each user channel; the user sendsthe uplink pilot frequency to a base station. The base station uses the estimated direction angle information to perform user selection and scheduling; The base station transmits the downlink dilute dredging pilot frequency, the selected user estimates the downlink gain of each propagation path according to the received pilot frequency and feeds back to the base station, and the base station reconstructs the downlink channel for each selected user; The base station uses the reconstructed downlink channel to design a precoding matrix for downlink multi-user data transmission. The invention breaks through the bottleneck of multi-user channel reconstruction of FDD large-scale MIMO system with low cost, and realizes downlink multi-user interference-free data transmission with high throughput.read more
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References
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Proceedings ArticleDOI
On the directional reciprocity of uplink and downlink channels in Frequency Division Duplex systems
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