Showing papers on "Lossless compression published in 1972"
TL;DR: It is shown that under certain conditions there is redundancy in the data and the estimator can be run at a lower rate using compressed data with practically the same performance as when no data compression is utilized.
Abstract: The problem of the existence of redundancy in the data in a recursive estimation problem is investigated. Given a certain data rate, should the estimator be run at the same rate? It is shown that under certain conditions there is redundancy in the data and the estimator can be run at a lower rate using compressed data with practically the same performance as when no data compression is utilized. It is also pointed out that, although at the higher rate there is redundancy in the data, the performance deteriorates noticeably when the data rate is lowered. Conditions for the existence of redundancy in the data and the procedure to remove it are presented. The procedure to compress the data is obtained such as to preserve the information in the sense of Fisher. The effect of data compression is a reduction in the computation requirements by a factor equal to the compression ratio. Such a reduction might be important in real-time applications in which the computing power is limited or too expensive. The application of this technique to the tracking of a reentry vehicle with a linearized filter is discussed in more detail and simulation results are presented.
23 citations
01 Apr 1972
TL;DR: In this paper, conditions for the constitutive dyadic parameters of a lossless bianisotropic medium were derived, and it was shown that a conservation relation, previously shown to hold for lossless anisotropic media, also holds for BIMs.
Abstract: Conditions for the constitutive dyadic parameters of a lossless bianisotropic medium are derived. Applying these conditions it is shown that a conservation relation, previously shown to hold for lossless anisotropic media, also holds for lossless bianisotropic media. Further, it is shown that a lossless bianisotropic medium set in motion remains lossless.
8 citations
TL;DR: A new variant of the gain-bandwidth problem involving transmission through a prescribed two-port is presented, illustrated by the design of an equalizer to control step response.
Abstract: A new variant of the gain-bandwidth problem involving transmission through a prescribed two-port is presented. It may be described as follows. Given a lossless two-port terminated in an open circuit, find the gainbandwidth constraints on the output voltage when the input of the twoport is excited by a finite generator through an arbitrary lossless equalizer. The theory is illustrated by the design of an equalizer to control step response.
6 citations
TL;DR: It is shown that, with a class of very simple lossless feed networks, it is possible to realise an arbitrarily specified voltage or current excitation at the array ports.
Abstract: For a given array, describable as an n-port network for feed considerations, it is shown that, with a class of very simple lossless feed networks, it is possible to realise an arbitrarily specified voltage or current excitation at the array ports.
5 citations
TL;DR: In this paper, the propagation of a rectangular envelope RF pulse in a lossless homogeneous isotropic plasma is considered and a time domain technique is developed for choosing the phase variation.
Abstract: The propagation of a rectangular envelope RF pulse in a lossless homogeneous isotropic plasma is considered. It is desired to produce pulse enhancement by an appropriate choice of the phase variation. A time domain technique is developed for choosing the phase. The resulting enhancement is greater than that reported previously.
4 citations
TL;DR: A reciprocal lossless state-space synthesis procedure for the hybrid parameters of LCT networks is given, which uses the basic properties of hybrid parameter of LC networks.
Abstract: A reciprocal lossless state-space synthesis procedure for the hybrid parameters of LCT networks is given. The procedure is simple and uses the. basic properties of hybrid parameters of LC networks.