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Transmit diversity apparatus and method using two or more antennas

An antenna and transmitter technology, applied in the field of antenna transmit diversity technology and systems, can solve the problems of difficult antenna design, difficult transmit diversity technology, method and device compatibility, cost increase, etc.

Inactive Publication Date: 2003-01-01
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the transmit power is unevenly distributed for a particular antenna, the antenna is difficult to design and undesirably costly
If the transmission / reception system is not efficiently designed, it is difficult to provide compatibility with the method and apparatus of the transmission diversity technique using two antennas

Method used

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  • Transmit diversity apparatus and method using two or more antennas
  • Transmit diversity apparatus and method using two or more antennas
  • Transmit diversity apparatus and method using two or more antennas

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Embodiment Construction

[0040] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

[0041] figure 1 The structure of a general four-antenna transmit diversity system is illustrated. see figure 1 , UTRAN (UMTS Terrestrial Radio Access Network) 101 includes four antennas ANT#1-ANT#4, and transmits a user signal through four antennas after converting the user signal to be suitable for four-antenna transmission. UE 103 respectively receives through the first antenna ANT#1 via the channel h 1 The signal transmitted, the signal transmitted by the second antenna ANT#2 via the channel h2, the signal transmitted by the third antenna ANT#3 via the channel h 3 The signal transmitted and through the fourth antenna ANT#4 via the channel h 4 The signal sent. UE 103 decodes signals receiv...

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Abstract

A transmit diversity system having at least four antennas. A UTRAN (UMTS (Universal Mobile Telecommunication System) Terrestrial Radio Access Network) transmitter in a mobile communication system having at least four antennas comprises a first adder connected to a first antenna, a second adder connected to a second antenna, a third adder connected to a third antenna, and a fourth adder connected to a fourth antenna.

Description

Background of the invention [0001] 1. technical field [0002] The present invention generally relates to a transmit diversity system, and more particularly to a system in which UTRAN supporting an N-antenna transmit diversity scheme is compatible with a UE for providing an M-antenna transmit diversity system. [0003] 2. Background technique [0004] Since the rapid development of mobile telecommunication technology results in an increase in the amount of business data that can be accommodated, the third generation mobile telecommunication system has been developed for high-speed data transmission. The third generation mobile telecommunication system has been standardized as an asynchronous W-CDMA (Wideband Code Division Multiple Access) or UMTS (Universal Mobile Telecommunications System) in Europe and a synchronous CDMA-2000 system in North America, respectively. Such mobile telecommunication systems are generally configured such that a plurality of UEs (User Equipme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7115H04B7/02H04B7/06H04J13/00H04J13/18
CPCH04B7/0669H04B7/0678H04B7/02
Inventor 李炫又崔虎圭郭龙准金成珍
Owner SAMSUNG ELECTRONICS CO LTD