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Port-to-beam pre-coding to enable codebook based MU-MIMO operation in active antenna systems

A technique of precoding and precoding matrix

Active Publication Date: 2020-05-05
蓝色多瑙河系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Existing codebook designs for UE feedback are not suitable for operation with active antenna systems capable of producing narrowband
Additionally, this codebook is designed with point-to-point MIMO in mind (also known as single-user MIMO (SU-MIMO)), but limited by the possibility of transmitting to multiple UEs at the same time (known as multi-user MIMO). very limited support

Method used

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  • Port-to-beam pre-coding to enable codebook based MU-MIMO operation in active antenna systems
  • Port-to-beam pre-coding to enable codebook based MU-MIMO operation in active antenna systems
  • Port-to-beam pre-coding to enable codebook based MU-MIMO operation in active antenna systems

Examples

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Embodiment Construction

[0027] discussed below Figure 1 to Figure 10 The various examples and examples used to describe the principles of the invention are by way of illustration only and should not be construed in any way as limiting the scope of the invention. Those skilled in the art will understand that the principles of the invention may be implemented in any suitably arranged wireless system.

[0028] The downlink of a wireless system includes a base station (BS) for transmitting data to a number of UEs located within the coverage of the base station. A base station seeks to increase the capacity experienced by all UEs within its coverage area through various techniques such as intelligent resource scheduling, spatial multiplexing using multiple antennas, and precoding data streams to eliminate inter-stream interference. like image 3 and Figure 4 As shown, the base station comprises a baseband unit (BBU) 1 and a remote radio head (RRH) 2 or 3 . The BBU is responsible for the digital proc...

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PUM

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Abstract

A method for communicating with a plurality of communication devices (UEs) using a phased array antenna system including an array of antenna elements, the method involving: receiving a plurality of port signal streams, wherein the plurality of port signal streams was obtained by preceding a plurality of data streams., each data stream of the plurality of data streams intended for a different corresponding UE; and within the phased array antenna system, processing the plurality of port, signal streams to (1) undo the preceding that was performed on the plurality of data streams, and (2) generate via the array of antenna elements a plurality of transmit beams, wherein each transmit beam is directed towards a corresponding different UE among the plurality of UEs and carries a corresponding transmit signal that is derived exclusively from the data stream among the plurality of data streams that is intended for that UE.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application 62 / 558,971, filed September 15, 2017, which is hereby incorporated by reference in its entirety. technical field [0003] Embodiments described herein relate to wireless communication systems, and more particularly to spatial multiplexing of data streams to multiple user equipment (UE) terminals in an Active Antenna System (AAS) using existing codebook-based feedback designs / Multiple User - Multiple Input Multiple Output (MU-MIMO). Background technique [0004] A communication system includes a downlink for transmitting a signal from a transmission point such as a base station (BS) to a user equipment (UE), and an uplink for transmitting a signal from the UE to the BS. [0005] In the case of using an active antenna array or active antenna system (AAS) in cellular wireless communication, the AAS can adjust the amplitude and phase shift of the transmitt...

Claims

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Application Information

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IPC IPC(8): H04B7/0456H04B7/0452H04B7/06H04W88/08
CPCH04B7/0608H04B7/0617H04W88/085H04B7/0452H04B7/0456
Inventor D·贝萨纳博特拉C·T·K·吴M·巴努
Owner 蓝色多瑙河系统有限公司