Shortwave information channel modulation-demodulation module based on OMAP chip and Ethernet bus

Abstract

The invention discloses a shortwave information channel modulation-demodulation module based on an OMAP chip and an Ethernet bus. The shortwave information channel modulation-demodulation module comprises an OMAP3530 control chip, an FPGA chip, an A / D converter, an upper conversion processing chip, a lower conversion processing chip and an Ethernet interface chip. The control chip reads voice data signals and external control instructions from the Ethernet bus through the Ethernet interface chip and feeds back the state information to the Ethernet bus. The A / D converter samples shortwave radio-frequency signals and transmits the shortwave radio-frequency signals to the lower conversion processing chip for lower conversion processing and then to the FPGA chip for filtering processing so as to achieve inner logic control of the modulation-demodulation module. The control chip is connected with the FPGA chip for receiving filtered and demodulated digital signals, and the Ethernet interface chip transmits the digital signals to the Ethernet. The shortwave information channel modulation-demodulation module is suitable for serving as a core module of the shortwave information channel device, can modulate and demodulate the shortwave signals and improves software portability and module universality.

Description

technical field [0001] The invention relates to the technical field of shortwave communication, in particular to a shortwave channel modulation and demodulation module based on an OMAP chip and an Ethernet bus. Background technique [0002] In the existing short-wave modulation and demodulation module, the combination form of DSP+CPLD or DSP+FPGA is often used, in which DSP is used for modulation and demodulation, and FPGA is used for logic control and filtering processing, but because there are many types of DSP chips , The language of each chip is also different, which brings a lot of inconvenience to software transplantation. With the development of FPGA, it has powerful parallel processing capabilities and rich IP cores, which can realize various digital signal processing algorithms. The newly developed OMAP chip has super processor performance, can realize the processing ability of ARM+DSP, has a unified development language, facilitates software transplantation, and ha...

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Problems solved by technology

[0002] In the existing short-wave modulation and demodulation module, the combination form of DSP+CPLD or DSP+FPGA is often used, in which DSP is used for modulation and demodulation, and FPGA is used for logic control and filtering processing, but because there are many types of DSP chips , the language of each chip is also different, which brings a lot of inconvenience to software transplantation, and with the development of FPGA, it has powerful parallel processing capabilities and rich IP cores, which can realize various digital signal processing algorithms

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