GSM/CDMA two-way duplex tower top amplifier

An amplifier and duplex tower technology, applied in power amplifier, radio/induction link selection arrangement, radio relay system, etc. The effect of switching success rate, improving signal quality, and improving call quality

Inactive Publication Date: 2005-10-19
徐平
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the base station amplifier and the tower mount amplifier of the global system for mobile communication (GSM) and the code division multiple access (CDMA) mobile communication system are separated, and cannot realize two-way duplex working mode, nor can realize network optimization. Others are relatively Typical mobile communication systems such as

Method used

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  • GSM/CDMA two-way duplex tower top amplifier
  • GSM/CDMA two-way duplex tower top amplifier

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Embodiment Construction

[0023] Please refer to figure 1 , figure 2 , the present invention is a kind of GSM / CDMA two-way duplex tower top amplifier, and it has uplink and downlink, and the circuit structure of uplink is: the input of transmitting and receiving antenna ANT through duplexer DUP2 and low noise amplifier LNA The output end of the low noise amplifier LNA is connected to the base station BTS through the duplexer DUP1,

[0024] The circuit structure of the downlink is: the base station BTS is connected to the input end of the power amplifier PA through the duplexer DUP1, and the output end of the power amplifier PA is connected to the transmitting and receiving antenna ANT through the duplexer DUP2.

[0025] The power amplifier PA adopts a pre-distortion high linear circuit.

[0026] The circuit structure between the input terminal and the output terminal of the power amplifier PA is: a predistortion circuit, a power amplifier tube, and an isolator are sequentially cascaded.

[0027] A ...

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Abstract

A GSM/CDMA bi-directional duplex top tower amplifier includes an up-link and a down-link, the circuit structure of the up-link is that an emit receive antenna (ANT) is connected with the input of a low noise amplifier (LNA) via a duplexer (DUP2), LAN output is connected with the base station (BTS) VIA dup1, the circuit structure of the down-link is that BTS is connected with the input of the PA via DUP, the output of PA is connected with the ANT via DUP2, a new base station extending cover and a network optimization device designed for solving the problem of covering the edge region of GSM/CDMA system and integrates the base station PA and simplex top tower amplifier.

Description

technical field [0001] The present invention relates to mobile communication devices. Background technique [0002] The improvement of the receiving sensitivity of the base station has always been a difficult problem, which is mainly due to the thermal noise caused by the thermal movement of the electrons in the active components of the receiving system of the base station and the radio frequency conductor, and the noise caused by the loss of the longer feeder line. Such as: the feeder in the receiving circuit, the jumper and the receiving splitter and high frequency amplifier in the base station. The introduction of these thermal noises reduces the signal-to-noise ratio (S / N) received by the system, thereby limiting the improvement of the receiving sensitivity of the base station and reducing the call quality. [0003] The principle of multi-stage amplification in signal transmission is beneficial to improve the system noise figure. The noise of a multistage amplifier sys...

Claims

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Application Information

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IPC IPC(8): H04W88/08H03F3/20H04B7/15
Inventor 徐平郑长春
Owner 徐平
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