, you are required to design a modulation scheme that will transmit two 4kHz audio channels, set up in the payload as one channel at 0 to 4kHz, and one channel from 9 to 13 kHz, and an OOK ASCII data signal at a 6.5 kHz carrier, and a target data rate of 3kbits/sec. This signal is then to be sent this on an FM carrier. You should then design a receiver which will receive this signal. In your design ensure you fully test and review your transmitter which will require FIR low pass and band pass filters with good roll-off for the audio channels. (Note that to make these necessary design changes to create your system, you require to engineer both the transmitter and receiver reference designs.) Choose an FM carrier frequency that is spectrally quiet, and ensure you have checked and corrected on the frequency offset of your RTL-SDR, and you carefully review on signal receive power (you are the gain control!). If you have any issues with your device, then it is acceptable to reduce the bandwidth of your transmitted signals to 3 kHz and modify the OOK modulation parameters (reduce the bit rate is also acceptable); ensure any such engineering spec changes are clear in your write up along with reasons for changing. As you create your design do it in a modular single step style. Consider first changing the 5kHz audio channel in the reference Tx design to a 4kHz channel with a good band-limiting FIR filter and confirm this works with the 12 kHz OOK still in place for your slightly modified receiver. Then move the OOK carrier from 12kHz to 6.5kHz carrier by redesign of Tx and Rx and confirm this works OK. Then finally add in your 9 kHz to 13 kHz second audio channel and design the additional receiver components for this

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