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RFID systems are an important component in the effort to increase the efficiencies of the logistics supply chain for the U.S. Department of Defense. While the U.S. DoD has mandated the use of RFID tags for its suppliers, the technology has not always kept up with the performance expectations. This study explores new modulation and coding techniques to(More)
A throughput analysis is provided of CSMA (carrier-sense multiple-access) and CSMA/CD (CSMA with collision detection) protocols using random signal powers to induce a capture effect when the ratio of the tagged packet power to the total power of interfering packets exceeds a preset detection threshold. The pseudo-Bayesian stabilization of CSMA and CSMA/CD(More)
The application of forward error correction coding to a fast frequency-hopped binary frequency-shift keying (FFH/BFSK) noncoherent receiver with self-normalization combining and noise jamming is discussed. The performance of the receiver is examined both when data are encoded using Reed-Solomon codes and concatenated Reed-Solomon and convolutional codes,(More)
An asynchronous spread-spectrum system called coded multiple chirp is proposed, and the possible spread-spectrum overlay over an analog FM-TV is investigated by computer simulation. In the proposed system, multiple single-sloped up and down chirps are encoded by a PN code and decoded by deciphers (pulse compression filters) followed by a digital code(More)
The authors present ARQ (automatic repeat request) strategies for packet communications in a fading mobile radio network. A queuing-theory approach is used to analyze various data-link-control protocols between a mobile node and a base station. Three fading models are considered for the mobile channel, namely, the slow Rayleigh fading model, the(More)
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