Index modulation (IM) refers to a family of modulation techniques that rely on the activation states of some resources/building blocks for information embedding. The resources/building blocks can be either physical, e.g., antenna, subcarrier, time slot, and frequency carrier, or virtual, e.g., virtual parallel channels, signal constellation, space-time matrix, and antenna activation order. A distinct feature of IM is that part of the information is implicitly embedded into the transmitted signal.
In this repo we implement three of the basics IM schemes:
- Single Mode OFDM Index Modulation (SM-OFDM-IM)
- Dual Mode OFDM Index Modulation (DM-OFDM-IM)
- Multiple Mode OFDM Index Modulation (MM-OFDM-IM)
and we propose and implement a novel (IM) scheme, with a much more improved Bit Error Rate (BER) performance, the
- Sub-block Index Multiple Mode OFDM Index Modulation (SI-MM-OFDM-IM).
.png)
This repo also contains a recearch paper:
- Obfuscation_of_Index_Modulated_OFDM_Signals.pdf
which contains:
- Model Architecture (Unencrypted/Encrypted)
- BER Performance Evaluation (Unencrypted/Encrypted)
- Modulation Obfuscation Security Evaluation (Unencrypted/Encrypted)
- Machine Learning - Neural Network
- Octave
-
Transmitter
-
Channel Model
- Rician Fading Channel
- Perfect Channel Estimation
-
Receiver
- Detector
- Viterbi-like Algorithm
- Better performance than the Optimal ML Detector
- Detector