Out-Phased Array Linearized Signaling (OPALS): A Practical Approach to Physical Layer Encryption
Abstract
Traditional methods of securing communications rely on methods such as encryption which require coordination between the transmitter and the receiver. Physical layer encryption techniques propose exploiting transmit arrays to cover the transmitted signal with beamformed noise or to generate directional modulation to provide security without requiring coordination a priori between the transmitter and receiver. These techniques suffer from implementation difficulties such as high computational requirements and higher amplifier linearity requirements.In this paper we propose out-phased array linearized signaling (OPALS) which provides a practical approach tophysical-layer encryption through spatial masking. Our approach modifies just the transmitter to employ the outphasing amplifier design to generate a unique masking signal to each element ofan antenna array. This approach improves the peak-to-average power ratio (PAPR) of the transmitter, provides a high degree of confidentiality, and requires no coordination with or modification to the intended receiver.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 26, 2015
- Accession Number
- AD1034940
Entities
People
- Bruce Jr R. Jordan
- Eric Tollefson
- Joseph D. Gaeddert
Organizations
- MIT Lincoln Laboratory