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Spatial spreading with space-time and space-frequency transmit diversity schemes for a wireless communication system

A technology of transmit diversity and scheme, applied in the field of communication, can solve problems such as hindering data transmission

Active Publication Date: 2007-10-17
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The varying nature of the propagation path prevents data transmission in an efficient and reliable manner

Method used

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  • Spatial spreading with space-time and space-frequency transmit diversity schemes for a wireless communication system
  • Spatial spreading with space-time and space-frequency transmit diversity schemes for a wireless communication system
  • Spatial spreading with space-time and space-frequency transmit diversity schemes for a wireless communication system

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Embodiment Construction

[0015] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" should not be construed as preferred or advantageous over other embodiments.

[0016] The transmission techniques described herein may be used for multiple-input single-output (MISO) and multiple-input multiple-output (MIMO) transmissions. MISO transmission uses multiple transmit antennas and a single receive antenna. MIMO transmission uses multiple transmit antennas and multiple receive antennas.

[0017] The transmission techniques described can be used in single-carrier and multi-carrier communication systems. A multi-carrier system may use Orthogonal Frequency Division Multiplexing (OFDM), other multi-carrier modulation schemes, or other concepts. OFDM effectively divides the entire system bandwidth into multiple (N F a) orthogonal frequency subbands, which are also called tones, subcarriers, bins, channels, and the like....

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Abstract

Techniques for transmitting data using a combination of transmit diversity schemes are described. These transmit diversity schemes include spatial spreading, continuous beamforming, cyclic delay diversity, space-time transmit diversity (STTD), space-frequency transmit diversity (SFTD), and orthogonal transmit diversity (OTD). A transmitting entity processes one or more (ND) data symbol streams based on a transmit diversity scheme (e.g., STTD, SFTD, or OTD) to generate multiple (NC) coded symbol streams. Each data symbol stream may be sent as a single coded symbol stream or as multiple (e.g., two) coded symbol streams using STTD, SFTD, or OTD. The transmitting entity may perform spatial spreading on the NC coded symbol streams with different matrices to generate multiple (NT) transmit symbol streams for transmission from NT antennas. Additionally or alternatively, the transmitting entity may perform continuous beamforming on the NT transmit symbol streams in either the time domain or the frequency domain.

Description

[0001] Priority claim based on 35 U.S.C. §119 [0002] This patent application claims priority to Provisional Application No. 60 / 607,371, filed September 3, 2004, entitled "Steering Diversity with Space-Time Transmit Diversity for a Wireless Communication System"; and Priority to Provisional Application No. 60 / 608,226, entitled "Steering Diversity with Space-Time and Space-Frequency Transmit Diversity Schemes for a Wireless Communication System," each assigned to the assignee of the present application, is hereby incorporated by reference It is incorporated into this application. technical field [0003] The present disclosure relates generally to communications, and more particularly to techniques for transmitting data in multi-antenna communications systems. Background technique [0004] A multi-antenna communication system uses multiple (N T ) transmit antennas and one or more (N R ) receiving antenna for data transmission. N can be T Each transmit antenna is used to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04L1/06
Inventor 杰伊·罗德尼·沃尔顿约翰·W.·凯彻姆马克·S.·华莱士史蒂文·J.·霍华德
Owner QUALCOMM INC
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