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Transmitting and receiving apparatus for supporting transmit antenna diversity using space-time block code

A technology for transmitting antennas and transmitters, applied in space transmit diversity, preventing/detecting errors through diversity reception, diversity/multi-antenna systems, etc., can solve problems such as reducing the attractiveness of real-time wireless applications

Inactive Publication Date: 2007-06-06
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This problem reduces their attractiveness for real-time wireless applications

Method used

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  • Transmitting and receiving apparatus for supporting transmit antenna diversity using space-time block code
  • Transmitting and receiving apparatus for supporting transmit antenna diversity using space-time block code
  • Transmitting and receiving apparatus for supporting transmit antenna diversity using space-time block code

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Embodiment Construction

[0058] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, well-known functions and constructions are not described in detail since they would obscure the invention with unnecessary detail.

[0059] The present invention will provide a simple encoding and decoding structure which will result in a transmit matrix with at least 2 columns orthogonal to each other while employing space-time block coding for 3 or more transmit antennas in a communication system , providing the greatest diversity gain.

[0060] launch: encode

[0061] The transmitter generates another predetermined number of symbol combinations from the predetermined number of input symbols and forms a matrix having one symbol combination in each cell. The transmit matrix varies according to the modulation scheme and the number of transmit antennas. Symbols in row (t) are transmitted at time (t), while symbols in column ...

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Abstract

A transmitter and a receiver are disclosed herein that support transmit antenna diversity using space-time block coding in a wireless communication system. The transmitter produces symbol combinations containing, as their elements, input symbols, the inversions and conjugates of the symbols, and symbols obtained by rotating the phases of the symbols once, forms a matrix having symbols in at least two columns orthogonal to each other with the symbol combinations, and transmits the matrix. The receiver detects symbols that minimize maximum likelihood (ML) decoding metrics over all possible symbols using channel gains from transmit antennas to a receive antenna. Also, the receiver selects candidate symbols among all possible symbols according to the characteristics of transmitted modulation symbols and detects symbols that minimize the ML decoding metrics.

Description

technical field [0001] The present invention relates generally to wireless communication systems, and more particularly to transmitting and receiving apparatus which use transmit antenna diversity to prevent the degrading effects of fading. Background technique [0002] One of the effective techniques for mitigating fading is transmit diversity in wireless communication systems. Assuming that the channel characteristics of the receiver are known to the transmitter, a switched diversity technique has been proposed (J.H Winters "Switched Diversity with Feedback for DPSK Mobile Radio System", IEEE Trans.Veh.Technol., No. 32 vol., pp. 134-150, February 1983"), and a multivibrator modulation / coding has also been proposed (G.G.Raleigh and V.K.Jones, "Multivibrate Modulation and Coding for Wireless Communication", IEEE J.Select .Areas.Commun., Vol. 17, pp. 851-866, May 1999). [0003] In practice, however, it is almost impossible for the transmitter to have ideal instantaneous in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/08H04L27/20H04L1/06H04L27/36
CPCH04B7/0891H04B7/0669H04L1/0618
Inventor 黄讚洙韦希德·塔罗克南承勋金映秀郑在学
Owner SAMSUNG ELECTRONICS CO LTD
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