Double-channel low-power-consumption transceiver

Abstract

The invention discloses a double-channel lower-power-consumption transceiver, and the transceiver comprises a low-noise amplifier, an in-phase oscillator, a quadrature oscillator, an in-phase frequency mixer, a quadrature frequency mixer, an in-phase variable gain amplifier, a quadrature variable gain amplifier, an adder, a positive frequency complex number filter, and a negative frequency complex number filter. The frequency mixing of output and input signals of the in-phase oscillator is carried out in the in-phase frequency mixer, and the frequency mixing of output and input signals of the quadrature oscillator is carried out in the quadrature frequency mixer. The outputs of the two frequency mixers respectively pass through the in-phase variable gain amplifier and the quadrature variable gain amplifier, and the outputs of the two amplifiers are added in the adder. The output of the adder passes through the positive frequency complex number filter and the negative frequency complex number filter, and the outputs of two channels are obtained. The transceiver employs a set of receiving equipment to receive the signals of two channels at the same time, saves the hardware expenditure, reduces the complexity of a system, reduces the power consumption, and is suitable for a multi-channel signal receiving and transmitting system.

Description

technical field [0001] The invention relates to the field of wireless communication and radio frequency circuit design, in particular to the structure of the radio frequency front end system of a receiver. The present invention specifically relates to a receiver for simultaneously receiving signals of two channels, using frequency division multiplexing, using one receiver to simultaneously receive two channels of signals, and simultaneously down-converting the two channels of signals to a low frequency, It is convenient for digital circuits to process. Background technique [0002] The communication system can communicate in a frequency division multiplexing manner to improve communication efficiency. However, for signals of different frequency bands, or adopt multi-frequency and multi-mode methods, receive signals in time division through different configurations, or use several sets of receiving equipment to receive signals in different frequency bands for different trans...

AI Technical Summary

Problems solved by technology

The multi-frequency multi-mode receiver uses one receiver. Although it can receive signals of different frequency bands through different settings, it cannot receive signals of different frequency bands at the same time, and it is necessary to switch the frequency of the local oscillator, start the filter, etc., and establish a receiving channel. Long, and cannot be optimized for each signal as a whole

For multiple receiver systems that receive multiple signals at the same time, due to the use of multiple sets of circuit modules, the power consumption is doubled

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