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An implementation method of a radio frequency amplifier for LTE transmit diversity

A radio frequency amplifier, transmit diversity technology, applied in the field of communication, can solve the problems of increasing user equipment cost, high receiving diversity cost, difficult receiving antenna diversity technology, etc.

Pending Publication Date: 2018-12-25
TIANJIN 712 COMM & BROADCASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited size of the mobile station, it is difficult to adopt the receiving antenna diversity technology, and the cost of receiving diversity at the mobile station is high, which increases the equipment cost of the user

Method used

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  • An implementation method of a radio frequency amplifier for LTE transmit diversity

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Experimental program
Comparison scheme
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Embodiment Construction

[0019] Such as figure 1 As shown, a radio frequency amplifier for LTE transmit diversity, the radio frequency amplifier includes two relatively independent signal channels: main channel and auxiliary channel, the main channel includes: quadruplexer I, quadruplexer II, power splitter I , Power splitter Ⅱ, power amplifier Ⅰ, power amplifier Ⅱ, low noise amplifier Ⅰ, low noise amplifier Ⅱ.

[0020] Auxiliary channels include: Quadruplexer III, Quadruplexer IV, Power Amplifier III, Power Amplifier IV, Low Noise Amplifier III, Low Noise Amplifier IV.

[0021] The specific connection of the main channel is: the RF transceiver port 1T / 1R of the LTE device is connected to the ANT terminal of the quadplexer I, the antenna port ANT1 is connected to the ANT terminal of the quadplexer II, and the B3TX terminal of the quadplexer I is connected to The input terminal of the power divider I, the output terminal 1 of the power divider I is connected to the input terminal of the power amplifie...

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Abstract

The invention relates to an implementation method of a radio frequency amplifier for LTE transmit diversity. The invention realizes the isolation of each frequency band by using a quadruplexer, a power divider is used to divide the transmitted signal into two parts in the transmitting channel. In order to compensate the loss of the power divider and the transmission line and increase the transmitting power, a power amplifier is used to amplify the transmitted signal, and a low noise amplifier is used to cancel the insertion loss of the receiving channel in the receiving channel, so as to improve the sensitivity of the whole machine. The invention has the advantages that the transmitting power of the transmitter of the LTE equipment can be increased from the original 0.2 W to 2W, and the sensitivity of the LTE receiver can be improved from the original 0.2 W to 2W. 93dBm up to 97dBm, the sensitivity can be achieved by adding the effect of transmit diversity of the antenna. 100dBm.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method for implementing a radio frequency amplifier for LTE transmit diversity. Background technique [0002] Space diversity is realized by using the random variation of field strength with space. The larger the space distance, the greater the difference of multipath propagation, and the smaller the correlation of received field strength. The correlation mentioned here is a statistical term that indicates the degree of similarity between signals, so the necessary spatial distance must be determined. After testing and statistics, CCIR (International Radio Consultative Committee) recommends that in order to obtain a satisfactory diversity effect, the distance between the two antennas of the mobile unit is greater than 0.6 wavelengths, and it is best to choose an odd multiple of 1 / 4 wavelength. If the distance between the antennas is reduced, Even if it is as small as 1 / 4 w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B1/04H03G3/20H03F3/24H03F3/189H03F1/26
CPCH03F1/26H03F3/189H03F3/24H03G3/20H04B1/04H04B1/0483H04B7/06H03F2200/451H04B2001/0408
Inventor 赵云龙张青平
Owner TIANJIN 712 COMM & BROADCASTING CO LTD