Physically Protected Spread Spectrum Communications
Abstract
Program Officer’s Name: Steven A. Lane Program Officer’s Department: Air Force Research Laboratory PROJECT SUMMARY Future wireless communications must be significantly enhanced to meet the expected consumer need in the 2020–25 timeframe. A key element for such enhancement is to employ various burst rate, modulation, and coding modes that can be adaptively selected to time-varying channel conditions. When the data rate increases to a high rate, the channel becomes a “frequency-selective” multipath fading channel. The power spectral density of a transmitted symbol would be unevenly distorted due to the frequency-selective nature of the channel transfer function. We propose to investigate the methods of physically protected spread spectrum communications systems against congested mutual multiple access interference and multipath frequency-selective fading channels by exploiting channel state information. The key strategies for this research are as follows: (a) novel time-domain beam-forming vectors for a coherent frequency-hopping spread spectrum system, and (b) novel pseudo-noise spreading/despreading sequence synchronization for direct-sequence spread-spectrum systems. Although this project focuses only on fundamental and theoretical technology studies, the results would provide many benefits to the public who are using mobile communications devices. These benefits would include longer battery life, higher quality-of-service, higher data throughput, and lower cost. This proposed research effort would support technology that is applicable to the commercial communications industry and military communications, including satellite communications.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 18, 2016
- Source ID
- FA94531510308
Entities
People
- Hyuck Kwon
Organizations
- Air Force Research Laboratory
- United States Air Force
- Wichita State University