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22480results about How to "Improve integrity" patented technology

Multi-dimensional data protection and mirroring method for micro level data

The invention discloses a data validation, mirroring and error/erasure correction method for the dispersal and protection of one and two-dimensional data at the micro level for computer, communication and storage systems. Each of 256 possible 8-bit data bytes are mirrored with a unique 8-bit ECC byte. The ECC enables 8-bit burst and 4-bit random error detection plus 2-bit random error correction for each encoded data byte. With the data byte and ECC byte configured into a 4 bit×4 bit codeword array and dispersed in either row, column or both dimensions the method can perform dual 4-bit row and column erasure recovery. It is shown that for each codeword there are 12 possible combinations of row and column elements called couplets capable of mirroring the data byte. These byte level micro-mirrors outperform conventional mirroring in that each byte and its ECC mirror can self-detect and self-correct random errors and can recover all dual erasure combinations over four elements. Encoding at the byte quanta level maximizes application flexibility. Also disclosed are fast encode, decode and reconstruction methods via boolean logic, processor instructions and software table look-up with the intent to run at line and application speeds. The new error control method can augment ARQ algorithms and bring resiliency to system fabrics including routers and links previously limited to the recovery of transient errors. Image storage and storage over arrays of static devices can benefit from the two-dimensional capabilities. Applications with critical data integrity requirements can utilize the method for end-to-end protection and validation. An extra ECC byte per codeword extends both the resiliency and dimensionality.

System using leo satellites for centimeter-level navigation

Disclosed herein is a system for rapidly resolving position with centimeter-level accuracy for a mobile or stationary receiver [4]. This is achieved by estimating a set of parameters that are related to the integer cycle ambiguities which arise in tracking the carrier phase of satellite downlinks [5,6]. In the preferred embodiment, the technique involves a navigation receiver [4] simultaneously tracking transmissions [6] from Low Earth Orbit Satellites (LEOS) [2] together with transmissions [5] from GPS navigation satellites [1]. The rapid change in the line-of-sight vectors from the receiver [4] to the LEO signal sources [2], due to the orbital motion of the LEOS, enables the resolution with integrity of the integer cycle ambiguities of the GPS signals [5] as well as parameters related to the integer cycle ambiguity on the LEOS signals [6]. These parameters, once identified, enable real-time centimeter-level positioning of the receiver [4]. In order to achieve high-precision position estimates without the use of specialized electronics such as atomic clocks, the technique accounts for instabilities in the crystal oscillators driving the satellite transmitters, as well as those in the reference [3] and user [4] receivers. In addition, the algorithm accommodates as well as to LEOS that receive signals from ground-based transmitters, then re-transmit frequency-converted signals to the ground.

Physiological sensor device

A physiological sensor device is attachable to the skin of a person for collecting physiological signals generated by the person's body. The device includes a flexible front layer made of a material that does not conduct electricity and a flexible back layer made of a material that does not conduct electricity. A flexible intermediate layer made of a material that does not conduct electricity is sandwiched between and fixed to the front layer and the back layer. Electrodes and electrical conductors are fixed to a back side of the intermediate layer. Each of the electrodes is attached to one of the electrical conductors and all of the electrical conductors are attached to a single common connector that protrudes through a portal in the front layer. A conductive gel pad is adhered to and aligned with each of the electrodes and protrudes through a portals in the back layer to contact the skin of a person when the physiological sensor device is attached to the skin of a person. Each layer of the physiological sensor device has, when attached to a standing person's chest, a vertically extending portion with a horizontally extending portion located at a lower end of the vertically extending portion to give the physiological sensor device a shape like an inverted T. The vertically extending portion is intended to overly a person's sternum and is sized to comfortably fit either a male or female patient.
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