ROF-based novel base station feedback receiving and transmit-receive calibrating multiplexing circuit

A multiplexing circuit and base station feedback technology, applied in electrical components, optical fiber radio, space launch diversity, etc., can solve the problems of increased optical fiber cost, high cost, complicated circuit implementation, etc., and achieve the effect of simplifying the circuit and reducing the cost

Active Publication Date: 2013-10-02
SUNWAVE COMM
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Problems solved by technology

At present, 10Gbps digital optical modules and high-speed digital interface chips are quite expensive, and "capacity expansion" leads to a high cost increase caused by the increase in fiber rate; at the sam

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  • ROF-based novel base station feedback receiving and transmit-receive calibrating multiplexing circuit
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  • ROF-based novel base station feedback receiving and transmit-receive calibrating multiplexing circuit

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with accompanying drawing:

[0013] The present invention proposes a novel ROF-based base station feedback receiving, transmitting and receiving calibration multiplexing circuit, in which the system mainly includes several modules such as a radio frequency transmitting and receiving circuit (TRX channel circuit), an analog optical module, a power amplifier, a low noise amplifier, and an antenna coupling plate. . First of all, the DPD feedback channel is multiplexed with its own receiving channel through the switch S1-1 (S2-1...S8-1); secondly, "TRX channel 8" is also used as the multiplexing branch of the transceiver calibration, through the switch S9-1 , S9-2, S9-3 and S9-4 realize multiplexing function.

[0014] The present invention is a base station implementation technology based on ROF technology (Radio over Fiber), and its main structure is composed of two parts: "BBU module" and "active antenn...

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Abstract

The invention relates to an ROF (Radio Over Fiber)-based novel base station feedback receiving and transmit-receive calibrating multiplexing circuit. The multiplexing circuit comprises a BBU module and an active antenna module, wherein an RF (Radio Frequency) small signal subjected to digital signal processing of the BBU module is coupled with an analog optical fiber for transmission through TRX channels of eight RF transceiver circuits and an analog optical module; a TDD (Time Division Duplex) time-division switching signal of the BBU module is transmitted to the active antenna module; the active antenna module amplifies the RF small signal through a power amplifier (PA) and then covers the amplified signal, an antenna coupling disc provides a coupling channel for transmit-receive calibration, and the switching state is selected according to the TDD property. The ROF-based novel base station feedback receiving and transmit-receive calibrating multiplexing circuit has the benefits that by utilizing the ROF technology, smooth capacity expansion can be realized without replacing devices, and the interface part has no cost increase. The ROF-based novel base station feedback receiving and transmit-receive calibrating multiplexing circuit adopts the switching manner to realize multiplexing of the feedback receiving and transmit-receive calibrating circuit according to the transmit-receive time division property of the TDD system, thereby simplifying the circuit and lowering the cost.

Description

technical field [0001] The invention belongs to the field of mobile communication network optimization, and mainly relates to a novel ROF-based base station feedback receiving, sending and receiving calibration multiplexing circuit. Background technique [0002] With the gradual rise of high-speed mobile Internet, 3G and 4G networks began to rise, and the explosive growth of data services caused the data transmission between traditional BBU and RRU to increase exponentially. For the multi-channel, multi-carrier 8-channel TD-SCDMA system and For the subsequent 8-channel TD-LTE system, the optical fiber rate has reached 10Gbps. If the carrier capacity needs to be increased in the future, a higher-speed optical fiber rate is required. At present, 10Gbps digital optical modules and high-speed digital interface chips are quite expensive, and "expansion" leads to a high cost increase caused by the increase in fiber rate; at the same time, the current DPD feedback circuit and trans...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04W88/08H04B10/2575H04B7/04H04W24/02
Inventor 徐锡强张果琲金古胡晓飞
Owner SUNWAVE COMM
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