Use of Property Restoral Algorithms for Blind Adaptation of Receive-Path andTransmit-Path Antenna Arrays in a Ground-Based Communication System. Phase 1

摘要

A receive adaptation algorithm which is tailored for spread spectrumcommunications, frequency hopping and direct sequence, has been developed. A receive architecture which is compatible with existing Army radios, yet flexible enough to accommodate a variety of algorithms, using commercially available and proven components, and with minimum complexity to allow size and power reductions in future designs to result in compatibility with the Army's mobil applications, has been developed. The performance of the algorithm and limitations of the architecture have been simulated, and the expected performance is evaluated. In addition, the possibility of using the information acquired during receive adaptation to steer transmit beams in either retrodirective or directive fashion was explored. Two applications in particular are addressed: Low Probability of Intercept (LPI) and Anti-Jam (A/J) communications. The concepts for application of an Adaptive Array Processor (AAP) to LPI and A/J communications is presented, and the expected performance is simulated and evaluated.