RSSI circuit of microwave outdoor unit

An outdoor unit and circuit technology, applied in the direction of electrical components, transmission control/balance, transmission system, etc., can solve the problems of large module size, many fault points, complex circuits, etc., and achieve small size, improved detection accuracy, and circuit structure compact effect

Inactive Publication Date: 2008-10-29
上海杰盛无线通讯设备有限公司
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Problems solved by technology

[0004] The general RSSI detection circuit first couples part of the RF signal from the received RF signal, then mixes it with the intrinsic frequency to obtain an intermediate frequency signal, and finally uses a special detection circuit to detect the amplitude of the signal and obtain the RSSI value. As shown in Figure 1, this technical solution requires the use of intrinsic signals, frequency mixing circuits, and special detection circuits, and has disadvantages such as complex circuits, high cost, many fault points, and large module volume.

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  • RSSI circuit of microwave outdoor unit
  • RSSI circuit of microwave outdoor unit
  • RSSI circuit of microwave outdoor unit

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Embodiment Construction

[0019] Please refer to the accompanying drawings for a further description of the present invention.

[0020] As shown in Figure 2, the present invention provides an RSSI circuit of a microwave outdoor unit. After filtering, amplifying, mixing, and attenuating the input radio frequency signal, it enters the secondary AGC circuit 1 and is taken out in the front and rear secondary AGC circuits 1. The signals are respectively amplified and sent to an MCU microprocessor 2, and the output of another temperature sensor chip 3 is also sent to the MCU microprocessor 2, and the MCU microprocessor 2 performs the gain on the signal sent by the temperature sensor 3. After correction and superposition of the secondary AGC signal, the received signal strength indicator RSSI is output.

[0021] The outdoor unit (ODU) receives the radio frequency signal from the antenna, and after filtering and amplifying, it mixes with the signal sent by the frequency generation circuit through amplification...

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Abstract

The invention relates to a RSSI circuit of an external unit of a microwave chamber, wherein, after wave filtering, amplification, frequency mixing and attenuation, inputted radio-frequency signals enter a two-level AGC circuit and then the signals are taken out of the first level AGC circuit and the second level AGC circuit and respectively amplified to be sent to an MCU. In addition, the chip output of a temperature sensor is also sent to the MCU. The MCU modifies gains, based on the signals sent by the temperature sensor and then outputs the RSSI after the superposition of two-level AGC signals is carried out. The invention has the advantages of low cost, high precision, wide application range, high reliability and small volume.

Description

technical field [0001] The invention relates to an RSSI circuit, in particular to an RSSI circuit of a microwave outdoor unit. Background technique [0002] The received signal strength indication RSSI (Received Signal Strength Indication) of the outdoor unit (ODU) of the microwave communication system is an important technical indicator of the microwave communication system, and the RSSI circuit is an important circuit unit inside the outdoor unit (ODU). [0003] The outdoor unit (ODU) of the microwave communication system generally needs an RSSI detection circuit, and the detection gives the RSSI value. The RSSI indicates the transmission power of the outdoor unit (ODU) at the opposite end, as well as the situation of the microwave transmission path, and it is also the automatic power of the microwave communication system. An important basis for the control (ATPC) function. [0004] The general RSSI detection circuit first couples part of the RF signal from the received R...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04B1/40
Inventor 万治民张宇
Owner 上海杰盛无线通讯设备有限公司
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