Entity

Time filter

Source Type

Carlsbad, CA, United States

Grant
Agency: Department of Defense | Branch: Army | Program: SBIR | Phase: Phase II | Award Amount: 749.89K | Year: 1998

In many applications signal acquisition and data decoding must be carried out in the presence of unknown, possibly time-varying channel parameters. When the Signal-to-Noise Ration (SNR) is medium or rapidly varying, ad hoc, methods for acquisition and data decoding do not perform well and there is a need for more sophisticated solutions. PSP allows unaided estimation of the channel where the channel is unknown due to geometry, doppler, interference/jamming or noise. In essence a multitude of estimates are tracked via a Viterbi trellis type algorithm to determine the optimum channel estimate in conjunction with the optimum communications decision. This, in turn, can provide substantial gains over ad hoc methods in the performance of communication systems. We propose to: 1) look in greater depth at PSP application to real world blind channel estimation problems, 2) size implementation of PSP and assess it's tractability today, and 3) extend the PSP theory in new areas as required. Areas to be investigated include co-channel interference mitigation, antijam enhancements, improved acquisition and tracking, and increased data rates in time varying bandlimited channels. ViaSat will apply its extensive experience in real world communications systems to evaluate the implementations necessary to reduce the PSP theory to practice.


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase II | Award Amount: 1.89M | Year: 1998

This proposal describe an SBIR Phase I program to specify, design, and perform functional prototype demonstrations of a lightweight, portable, Basic S-band tactical terminal (B-STT). The proposed work utilizes innovative FLAPS antenna technology and miniaturized digital receivers in a simplified satellite earth station architecture to significantly reduce the size and weight of the existing B-STT to well under 100 pound weight limit.The proposed tasks include completing a high level design for a lightweight B-STT, and demonstrating functional prototypes of the critical parts of the design. The lightweight B-STT design will also be analyzed with respect to size, weight, cost, and other performance criteria in order to determine the feasibility of follow-on Phase II.ViaSat is teamed with Malibu Research Associates to jointly apply our complementary skills to the problem of reducing the weight of the existing B-STT by more than a factor of four. This team provides the full spectrum of expertise required for satellite earth terminal development, as demonstrated by our past successful joint development of lightweight portable satellite earth terminals.


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 99.58K | Year: 1999

N/A


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 98.98K | Year: 1999

N/A


N/A

Grant
Agency: Department of Defense | Branch: Army | Program: SBIR | Phase: Phase I | Award Amount: 69.28K | Year: 2000

N/A

Discover hidden collaborations