Hi Fumihiko!
The issue of frame loss and high Frame Error Rate (FER) may occur due to several reasons in the transmission and reception of digital signals. Based on the system information and simulation results you provided, here are some potential approaches to reducing frame loss and improving the Frame Error Rate (FER)
- Modify the modulation scheme: Switching to a more robust modulation scheme than DBPSK such as QPSK, 8-PSK, or 16-QAM can improve the signal-to-noise ratio (SNR) and therefore decrease the error rate.
- Increase the length of the preamble: Increasing the length of the preamble or repeating the existing preamble more times will help the receiver more successfully detect the start of a frame.
- Implement an error correcting code: An error correcting code can help detect and correct errors in the message.
- Optimize the filter span per symbol: Experiment with different filter span lengths to find one that minimizes intersymbol interference and improves the accuracy of decoding while still being computationally feasible.
Hope this helps!
Thank you.
