Signal Processing - Signal processing with heavy-tailed models
EURASIP Journal on Applied Signal Processing
AM-FM interference excision in spread spectrum communications via projection filtering
EURASIP Journal on Applied Signal Processing
Separating more sources than sensors using time-frequency distributions
EURASIP Journal on Applied Signal Processing
EURASIP Journal on Wireless Communications and Networking
Covert communications using empirical mode decomposition
SARNOFF'09 Proceedings of the 32nd international conference on Sarnoff symposium
Chirp-like jammer excision in DSSS communication systems using EMD based radon wigner distribution
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
International Journal of Communication Systems
| Hi-index | 35.68 |
The capability of the time-frequency distributions (TFDs) to properly represent a single as well as multiple component signals in time and frequency permits the application of a new approach for interference excision in spread spectrum communication systems. The instantaneous frequency (IF) estimate from the TFD is used to construct a finite impulse response filter that reduces the interference power with a minimum possible distortion of the desired signal. The proposed technique is therefore a case of open-loop adaptive filtering. Three- and five-coefficient zero-phase excision filters are considered. Closed-form expressions of the improvement of SNR at the receiver correlator output using the TFD-based adaptive filtering are derived for two extreme cases of time-varying interferers, namely, those of fixed frequency sinusoids and randomly changing instantaneous frequencies. Simulation results including the bit error rates are presented for both swept and frequency hopping jammers