RE: Packet-based Digital Link :: QAM Modulation & Demodulation

[oyw1022]

Hello, sir, docs.

I completed the design and implementation of the multi-hop relay network between USRP2921 using the Packet-based Digital Link example.

It took a long time to create modules for the exchange of transceivers and RSSI, SNR, BER measurements, using only USRP2921, but it was finally achieved.

In addition, i will trying to convert M-PSK-based modulation method to M-QAM method, and have anyone done this?

According to the quality of the wireless telecommunication, BPSK and 64QAM method are to be constructed by using the case structure.

*The completed code will be distributed through the git hub soon.

[oyw1022 · Accepted solution]

The test was successful for packet transmission and reception based on 4 to 128QAM.

Hint:: A bit for additional symbol marking is added to the existing packet parameter, and in the case of 64QAM, a random bit of 2048 is added to output the symbol constellation table regardless of the payload.