The subject of this paper is the Colorado State University–University of Chicago–Illinois State Water Survey (CSU–CHILL) National Radar Facility’s S-band polarimetric research radar. Key features of this system include polarization agility (provided by the dual-transmitter, dual-receiver design), a recently updated signal processor, and a low (234 dB, two way) integrated cross-polar ratio (ICPR...

Cognitve radar can be aware of its environment, utilize intelligent signal processing, provide feedback from the receiver to the transmitter for adaptive illumination and preserve the information contents of radar returns. In this paper, based on the analysis of the parameters of radar mesurements, range-Doppler resolution cell is built up, then stochastic dynamic programming model of waveform ...

The Dual Busy Tone Multiple Access (DBTMA) scheme was designed for distributed multi-hop networks. The protocol uses the RTS/CTS dialogue to reserve the shared channel. In multi-hop networks, some nodes in the range of the transmitter and/or the range of the receiver might not be able to hear a successful RTS/CTS message exchange. This may lead to access collisions and data destruction. Hence w...

The Serial Streaming Telemetry infrastructure is being augmented with the Telemetry Network System, which is a net-centric infrastructure requiring bi-directional communications between the test article segment and the ground station segment. As a result, future radio segments must implement transceiver architecture to support bi-directional communications. This paper presents a design methodol...

The bit error rate (BER) performance for ultra-wide band (UWB) indoor communication with the impact of metallic furniture is investigated. The impulse responses of different indoor environments for any transmitter and receiver location are computed by shooting and bouncing ray/image and inverse fast Fourier transform (IFFT) techniques. By using the impulse responses of these multi-path channels...

In the paper, we gave after a brief overview of free space, Bacon and CEPT SE21 propagation models, mentioned in the TETRA Direct Mode Operation (DMO) standard, the comparison of the path losses, calculated by two-ray and multi-wall models and pass losses, obtained by field measurement campaign. We found out, that the tworay model is suitable for fast estimation of the TETRA DMO signal coverage...

In this contribution we propose two new iterative precoder and equalizer designs for the Downlink (DL) scenario of Multi-User (MU)-MIMO systems which employ Filter Bank based Multi-Carrier (FBMC) with Offset-Quadrature Amplitude Modulation (O-QAM). In a MU-MIMO DL scenario, we must design our per-subcarrier filters to compensate the inter-symbol and intercarrier interference (ISI and ICI) prese...

Orthogonal frequency division multiplexing (OFDM) is a pramising technique for multi-antenna broadband systems, since it significantly reduces receiver complexity by providing orthogonal suhchannels. A drawback of OFDM systems is the performancelrate reduction due to the cyclic prefix overhead. In this paper, we propose receiver structures that exploit the cyclic prefix to increase the performa...