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Signaling optimization and selection validation for selection of transmitting antenna with error feedback

A technology for transmitting antennas, antennas, applied in the direction of multiplex communication, electrical components, orthogonal multiplex systems, etc.

Inactive Publication Date: 2008-09-24
MITSUBISHI ELECTRIC RES LAB INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, techniques for antenna selection usually assume that the feedback is error-free and immediate
Additionally, these techniques assume that the communication channels are uncorrelated

Method used

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  • Signaling optimization and selection validation for selection of transmitting antenna with error feedback
  • Signaling optimization and selection validation for selection of transmitting antenna with error feedback
  • Signaling optimization and selection validation for selection of transmitting antenna with error feedback

Examples

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Embodiment Construction

[0031] In the following exemplary explanation of non-limiting aspects of the invention, the symbol (.) T represents the matrix transpose, Indicates the Hermitian transpose, ‖.‖ indicates the norm of a vector, and ‖.‖ F is the Frobenious mod. Symbol C a×b Represents a set of a×b complex matrices. E. A|B [.] represents the expected value of a random variable (RV) A given B. If A is a discrete RV, Pr(A|B) represents the conditional probability of the probability of A occurring given that B occurs, and if A is a continuous RV, p(A|B) represents the probability of A occurring under the condition that B occurs The probability distribution function (pdf) of .

[0032] Figure 10 A non-limiting illustration of a method of communicating in a network according to the present invention is provided. To this end, step S200 includes mapping codewords to a subset of antennas, thereby constructing a codebook. The subset of antennas includes one or more antennas. In step S202, the tr...

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Abstract

A method is provided for receiving data at a receiver via a communication channel from a transmitter having at least two transmitter antennas, the method including: receiving (S204) a codebook including an assignment of at least two respective codewords to the at least two transmitter antennas, the assignment being based at least in part on a characteristic of the communication channel; detecting a state of the communication channel by which the receiver can communicate with the transmitter; selecting (S206) at least one desired transmitter antenna from the at least two antennas based at least in part on the detected state of the communication channel; transmitting (S208) to the transmitter a codeword corresponding to the at least one desired transmitter antenna; and receiving (S210) data at the receiver transmitted by the transmitter.

Description

technical field [0001] The present invention generally relates to methods, devices and systems for selecting transmit antennas by taking into account errors in feedback from a receiver. The invention also relates to methods, devices and systems for identifying transmit antennas at the receiver end. Background technique [0002] Although multiple-input multiple-output (MIMO) systems can significantly improve the data transmission rate and transmission reliability of wireless channels without requiring any additional bandwidth, issues such as increased hardware and signal processing complexity hinder their implementation. widely used. This is because each transmit antenna requires a dedicated radio frequency (RF) chain that includes a digital-to-analog (D / A) converter, an upconverter, and a power amplifier. Meanwhile, each receive antenna requires an RF chain including a low-noise amplifier (LNA), a down-converter, and an analog-to-digital (A / D) converter. [0003] In gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00
Inventor 内莱士·B·梅赫塔李亚波安德里亚·F·莫利萨奇张锦云
Owner MITSUBISHI ELECTRIC RES LAB INC