AM-FM interference excision in spread spectrum communications via projection filtering
EURASIP Journal on Applied Signal Processing
Narrowband Jammer Excision in CDMA Using Particle Swarm Optimization
ICIC '08 Proceedings of the 4th international conference on Intelligent Computing: Advanced Intelligent Computing Theories and Applications - with Aspects of Theoretical and Methodological Issues
A reconfigurable GNSS acquisition scheme for time-frequency applications
EURASIP Journal on Advances in Signal Processing
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
| Hi-index | 35.68 |
A generalized approach for interference suppression in PN spread spectrum communications using open-loop adaptive excision filtering is introduced. The excision filter coefficients under this technique depend on the jammer power and its instantaneous frequency (IF) information, and both values can be gained in the time-frequency domain. The dependency of the excision filter characteristics on the interference power, which was absent in past contributions in this area, is of significant importance as it allows optimum tradeoff between interference removal and the amount of self-noise generated from the induced correlation across the PN chip sequence, due to filtering. This tradeoff is bounded by the two extreme cases of no self-noise, which implies preprocessing disabled, and full interference excision, which the case previously considered. In this paper, we derive the FIR excision filters that maximize the receiver signal-to-noise ratio for narrowband interference and discuss the generalization to nonstationary jamming environment