Intra-symbol SMSE waveform design amidst coexistent 802.11 OFDM signals

Spectrally Modulated, Spectrally Encoded (SMSE) waveform designs are optimized in a coexistent environment by independently selecting intra-symbol subcarrier power and modulation order. As demonstrated previously with Direct Sequence Spread Spectrum (DSSS) primary users (PU), SMSE waveform applicability is extended here using a coexistent environment containing multiple OFDM-based 802.11 PU signals. By exploiting statistical knowledge of PU spectral and temporal behavior, the SMSE system throughput (bits/second) can be maximized while adhering to SMSE and PU bit error rate (BER) constraints with mutual coexistent interference limited to manageable levels. Results for the SMSE-802.11 coexistent scenario demonstrate that significant performance improvement is available when the SMSE signal dynamically adapts to PU transmissions.