Frequency modulation on fpga

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Hello,

does anybody knows how to design and implement a frequency modulator on fpga?

Some weeks ago, I implemented a sine wave generator and a frequency generator on base on a lookup table and now I want ot use this frequency generator to modulate the frequency of a carrier ( with a higher frequency) on fpga using vhdl. I have been told to use the princip of the VCO which generate a frequency base on the input voltage. my input voltage are the values of the frequency generator but I don´t know how to use those values to achieve the frequncy modulation. I red also about DDS/NCO but I just don t know how to use thier fonctioning princip to realize the frequency modulation in my case. if have a suggestion , please don t hesitate to respond.

thanks for your help.

Dora

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Hi Dora,

Due to i am a new learner of FPGA and i am now need to design a amplitude modulator project. May i know how do you design the sine wave generator on FPGA board.

Thank you.