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Method and apparatus for controlling multi-antenna transmission in a wireless communication network

A multi-antenna, transmission control technology, applied in the field of multi-antenna transmission, modulation and channel coding rate, can solve problems that have not been properly solved

Inactive Publication Date: 2013-09-18
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0030] Selecting an appropriate modulation and channel coding rate for each transmission stream based on channel statistics has not been properly addressed so far, in addition to computing precoding weights for multi-antenna transmissions

Method used

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  • Method and apparatus for controlling multi-antenna transmission in a wireless communication network
  • Method and apparatus for controlling multi-antenna transmission in a wireless communication network
  • Method and apparatus for controlling multi-antenna transmission in a wireless communication network

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Embodiment Construction

[0039] figure 1 One embodiment of a multi-antenna transmitter 10 for transmitting to multiple target wireless communication devices 12 is illustrated. Wireless communication devices 12 (abbreviated "WCD" in the figures) may not all be the same, and it should be understood that they represent a large number of possible device types, such as cellular telephones, pagers, portable digital assistants, computers, network Access cards or any hybrid of such devices. Thus, for the balance of this discussion, they are simply referred to as "receivers 12".

[0040] In at least one embodiment, transmitter 10 is a base station or other transceiver node in wireless communication network 14 and supports downlink (DL) and uplink (UL) wireless communications to and from receiver 12 . In at least one embodiment, transmitter 10 is configured for multiple-input single-output (MISO) or multiple-input multiple-output (MIMO) operation, and receiver 12 is equipped with one or more receive antennas ...

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Abstract

Multi-antenna transmission control presented herein involves generating a set of virtual channel realizations at the transmitter that shares the same second-order statistics as the actual channel realizations observed for a targeted receiver. By making the control-related quantities of interest at the transmitter depend on the long-term statistics of the channel, the actual channel realizations are not needed for transmission control, e.g., for accurate Multiple-Input-Multiple-Output (MIMO) preceding. As such, the use of virtual channel realizations enables transmission control that approaches the "closed-loop" channel capacity that would be provided by full feedback of the (instantaneous) actual channel realizations, without requiring the overhead signaling burden that attends full feedback.

Description

technical field [0001] The present invention relates generally to wireless communication systems, and more particularly to controlling multi-antenna transmissions in wireless communication networks, such as controlling precoding operations and selecting modulation and channel coding rates for multiple-input multiple-output (MIMO) transmissions. Background technique [0002] For wireless communication systems with multiple transmit antennas, the availability of specific information about the state of the (propagation) channel at the transmitter plays a key role in achieving the highest possible spectral efficiency. For example, E. Telatar, "Capacity of multi-antenna Gaussian channels," Euro.Trans.Telecomm.ETT, Vol. 10, No. 6, pp. 585-596, November 1999, demonstrates that when available at the transmitter When obtaining accurate information about the instantaneous channel state, a large increase in capacity can be achieved by utilizing multiple antennas. [0003] Feedback of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L27/26H04B7/06
CPCH04B7/0626H04B7/0426H04L25/0206H04B7/0417H04L1/0675H04L27/2601H04L25/0204
Inventor D·许L·克拉斯尼
Owner TELEFON AB LM ERICSSON (PUBL)
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