Adaptive antenna transmission apparatus, and base station apparatus using the same

An adaptive antenna and transmitting device technology, applied in diversity/multi-antenna system, transmitter monitoring, space transmit diversity and other directions, can solve the problem of line capacity reduction, etc., to prevent the decrease of system line capacity, reduce downlink transmission power, The effect of reducing downlink interference power

Inactive Publication Date: 2005-08-10
NEC CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, this interference due to cell overlap is the cause of line capacity degradation

Method used

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  • Adaptive antenna transmission apparatus, and base station apparatus using the same
  • Adaptive antenna transmission apparatus, and base station apparatus using the same
  • Adaptive antenna transmission apparatus, and base station apparatus using the same

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Embodiment Construction

[0029] An adaptive antenna transmitting device related to an embodiment of the present invention will be specifically described below with reference to the accompanying drawings.

[0030] figure 1 is a functional block diagram of one embodiment of the invention, and Figure 4 The same parts are denoted by the same symbols. In this example, only for and Figure 6 The different parts of the prior art will be described, the difference is that an interference processing unit 7 is provided, the input of the interference processing unit 7 is connected to the fourth terminal of the antenna sharing unit 8 (the first terminal is connected to the transmission output terminal of the wireless unit 5 , the second terminal is connected to the receiving input terminal of the wireless unit 5, the third terminal is connected to the antenna 9), and its output is connected to each signal processing unit 4.

[0031] The interference processing unit 7 includes a wireless switching unit 18 , an ...

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Abstract

An adaptive antenna transmission apparatus, used in a base station apparatus of a cellular communication system, for transmitting signals by a plurality of antenna elements constituting an adaptive antenna. In the adaptive antenna transmission apparatus, a base station apparatus (1) detects an interference component, which is a reflection component of a downlink transmission signal of its own base at an interference processing part (7), and controls the downlink transmission directivity, in accordance with the result of detection at a signal processing part (4) , so as to minimize the reflected component. This can reduce the interference power of the downlink transmission signal at the base station apparatus (1) , and thereby can prevent decrease of the channel capacity and make the effective operation of the base station.

Description

technical field [0001] The invention relates to an adaptive antenna transmitting device, especially applied to a base station device in a CDMA cellular communication system, which transmits a transmission signal through a plurality of antenna elements constituting an adaptive antenna. Background technique [0002] Compared with the existing FDMA (Frequency Division Multiple Access) and TDMA (Time Division Multiple Access) methods, the CDMA (Code Division Multiple Access: Code Division Multiple Access) method is a method that can The wireless transmission method that greatly increases the capacity of subscribers has attracted worldwide attention. In a mobile communication system, the area that a base station can provide services is called a cell. Generally, multiple base stations are configured so that their cells overlap each other, so that a larger area is covered by multiple cells. This method is called a cellular method, and in the CDMA method, communication interference...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/10H04B7/06
CPCH04B7/0613Y02B60/50H04B17/0025H04B7/0617H04B17/18
Inventor 高井谦一
Owner NEC CORP
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