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Wireless communication transmitter and transmitting method

A transmitter and signal technology, applied to electrical components, transmission systems, etc., can solve problems such as low calibration accuracy, affecting the overall performance of wireless communication transmitters, and complex circuit control

Active Publication Date: 2020-01-17
浙江科睿微电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the problems existing in the prior art, the embodiment of the present invention provides a wireless communication transmitter and a transmitting method, which are used to solve the problem of using an analog calibration circuit to eliminate local oscillator leakage and IQ signal mismatch in the transmitter in the prior art. , the circuit control is complex and the calibration accuracy is not high, which affects the technical problems of the overall performance of the wireless communication transmitter

Method used

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  • Wireless communication transmitter and transmitting method

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Embodiment 1

[0069] This embodiment provides a wireless communication transmitter, such as figure 1 As shown, the transmitter includes: a digital signal processing circuit 1, a first digital-to-analog converter 2, a first analog signal processing circuit 3, a second digital-to-analog converter 4, a second analog signal processing circuit 5, and a quadrature local oscillator signal Generating circuit 6, power amplifier 7; Wherein,

[0070] The digital signal processing circuit 1 is provided with a precompensation circuit, and the precompensation circuit is provided with a precompensation model; the digital signal processing circuit 1 is used to receive the baseband signal IQ signal to be transmitted, and utilizes the precompensation model to the described IQ The signal is compensated, and the compensated in-phase I signal and intersecting Q signal are respectively output;

[0071] The first digital-to-analog converter 2 is used to convert the compensated I signal into a first analog signal...

Embodiment 2

[0114] This embodiment provides a wireless communication transmission method, such as Figure 5 As shown, the methods include:

[0115] S510, receiving the baseband signal IQ signal to be transmitted, using a pre-compensation model to compensate the IQ signal, and outputting the compensated in-phase I signal and intersecting Q signal respectively;

[0116] In this step, utilize the digital signal processing circuit to receive the baseband signal IQ signal to be transmitted, the digital signal processing circuit is provided with a pre-compensation circuit, and the pre-compensation circuit is provided with a pre-compensation model; utilize the pre-compensation model to compensate the IQ signal , respectively output the compensated in-phase I signal and intersecting Q signal.

[0117] The output of the digital signal processing circuit is the transmission frequency f BB =2.5MHz complex baseband monotone signal, the waveform expression is s(n)=exp(j·2π·f BB / f sn), the complex...

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Abstract

The embodiment of the invention provides a wireless communication transmitter and a transmitting method, and the transmitter is characterized in that a digital signal processing circuit is provided with a pre-compensation circuit, and the pre-compensation circuit is provided with a pre-compensation model; the digital signal processing circuit is used for receiving an IQ signal of the baseband signal, compensating the IQ signal by using the pre-compensation model, and outputting a compensated in-phase I signal and an intersected Q signal; the first digital-to-analog converter converts the compensated I signal into a first analog signal; the first analog signal processing circuit filters and amplifies the first analog signal; the second digital-to-analog converter is used for converting thecompensated Q signal into a second analog signal; the second analog signal processing circuit is used for filtering and amplifying the second analog signal; the quadrature local oscillator signal generation circuit receives the filtered and amplified first analog signal and second analog signal, and performs quadrature modulation on the first analog signal and the second analog signal to obtain aradio frequency signal; the power amplifier amplifies and outputs a radio frequency signal.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a wireless communication transmitter and a transmitting method. Background technique [0002] When designing a wireless communication transmitter, in order to reduce the cost of equipment design and reduce the size of the device, the zero-IF method is usually used to improve the integration of the chip and reduce the number of off-chip originals. However, there are local oscillator leakage and in-phase quadrature IQ signal mismatch in the RF signal transmitted by the transmitter designed by the zero-IF method. When the leakage and mismatch are serious, it will have a great impact on the performance of the entire communication system, such as high error Bit rate, communication interruption and interference and other issues. [0003] In the prior art, some separate analog calibration circuit controls are set up to eliminate local oscillator leakage and IQ mi...

Claims

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Application Information

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IPC IPC(8): H04B1/00H04B1/04
CPCH04B1/0028H04B1/04H04B2001/0408H04B2001/0491
Inventor 不公告发明人
Owner 浙江科睿微电子技术有限公司
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