FM quadrature modulation device and method thereof for adaptive code rate telemetering equipment

A telemetry equipment, quadrature modulation technology, applied in the direction of amplitude-to-angle modulation conversion, frequency modulation carrier system, electrical components, etc., can solve problems such as large workload, and achieve the effect of reducing workload

Pending Publication Date: 2017-08-25
西安思丹德信息技术有限公司
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Problems solved by technology

[0003] However, telemetry equipment needs to deal with various PCM data streams with different code rates. In the existing technology, the underlying modulation program is generally modified, which brings a lot of work to project development and code transplantation.

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  • FM quadrature modulation device and method thereof for adaptive code rate telemetering equipment
  • FM quadrature modulation device and method thereof for adaptive code rate telemetering equipment
  • FM quadrature modulation device and method thereof for adaptive code rate telemetering equipment

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Embodiment Construction

[0032] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] The invention provides an adaptive code rate telemetry equipment FM quadrature modulation device, such as figure 1 As shown, it includes a pre-filter module, an adaptive baseband modulation module, a digital up-conversion module and a DA chip, wherein the pre-filter module is a raised cosine roll-off filter, and the DA chip is a DA3162 chip. Among them such as figure 2 As shown, the functions of the pre-filter module, adaptive baseband modulation module and digital up-conversion module can be realized by using the xc7A200T chip based on the FPGA platform, and the technical solution is realized by connecting the IO module and the DA3162 chip through the xc7A200T chip.

[0034] Concrete working principle of the present invention is: as image 3 As shown, the pre-filtering module receives the PCM data stream, an...

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Abstract

The invention discloses an adaptive code rate telemetry equipment FM quadrature modulation device and a method thereof, comprising a pre-filter module, which obtains a PCM data stream and filters it; an adaptive baseband modulation module receives the pre-filtered data and The code rate of the PCM data stream, after phase accumulation, outputs I and Q quadrature signals through the DDS module; the digital up-conversion module performs CIC interpolation and up-conversion on the I and Q quadrature signals to generate frequency modulation signals; the DA chip converts the frequency modulation signals Perform digital-to-analog conversion and then transmit it wirelessly. Based on the FPGA platform, the FM quadrature modulation of various code rates is realized through the improved adaptive code rate hardware architecture.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an FM quadrature modulation device for adaptive code rate telemetry equipment, and also relates to an FM quadrature modulation method for adaptive code rate telemetry equipment. Background technique [0002] FM is a widely used telemetering system, and currently it is mainly implemented in two ways: analog phase-locked frequency modulation circuit and digital software radio. The analog phase-locked frequency modulation circuit synthesizes the amplitude, frequency and phase of the waveform in an analog way, but it is difficult to control and the system is not flexible enough. With the rapid development of large-scale integrated circuits, digital signal processing technology and software radio technology, the digitization trend of FM modulation system has become inevitable. [0003] However, telemetry equipment needs to deal with various PCM data streams with differ...

Claims

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Application Information

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IPC IPC(8): H04B1/00H04L27/12H03C3/40
CPCH04B1/0028H03C3/40H04L27/12
Inventor 徐炜王小康李庆
Owner 西安思丹德信息技术有限公司
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