Communications in the Digital Battlefield: Fundamental Problems in the Design of Heterogeneous Networks
Upamanyu Madhow · Defense Technical Information Center (DTIC) · 2000
A number of key problems in wireless communication, ranging from the physical layer to the data transport layer, were investigated. The key results are as follows: (a) A new Quality of Service (QoS) framework, and new schedulers, were developed for supporting heavy-tailed Internet traffic over wireless, without conservative resource provisioning. Related results include analysis and design prescriptions for supporting TCP over wireless, and joint scheduling and link layer optimization for support of real-time traffic over wireless. (b) New techniques in multiuser detection, interference suppression and equalization were invented. These include the patented Differential Minimum Mean Squared Error (DMMSE) technology that is a promising approach for the design of antijam GPS receivers. (c) A framework was developed for efficient noncoherent communication over time varying channels, using joint channel and data estimation rather than suboptimal pilot-based channel estimation followed by demodulation and decoding. Fundamental information-theoretic limits for time-varying channels were developed.