Abstract: The present invention pertains to demodulation of GMSK signals by estimating a carrier frequency of the signal having a carrier residual, basebanding the signal, tracking the signal's carrier frequency, removing the carrier residual, detecting a data burst, generating a bank of poly-bit matched filters, applying the bank of poly-bit matched filters to the signal, determining a magnitude and phase of the output of each poly-bit filter of the bank of poly-bit matched filters, determining a maximum magnitude, determining the location of a baud center, generating a plurality of correlation signals by applying the bank of poly-bit matched filters at the baud center, estimating a carrier phase, removing the estimated carrier phase, applying a Viterbi decoding algorithm to the signal, and estimating the transmitted data sequence.

Abstract: A reusable tamper indicating bag closure for transporting most items in a bag such as documents and portable computing devices including laptops, PDAs, mobile phones, iPods® . . . etc. that would appeal to a broad spectrum of customers including the individual buyer, the business user, and the government user. The tamper-evident bag closure is defined by a lid with multiple hasps and a base with knobs that attach to the bag and is secured by a locking mechanism placed through an opening on the base and inserted within an insertion aperture such that locking the lock mechanism causes the lid to slide into alignment with the base and engages the plurality of hasps with the plurality of knobs thus securing the bag. The bag closure also has several tamper indicating features including the use of tamper indicating markers, wire seals and tamper indicating labels.

Abstract: A reusable tamper indicating transport tube that can be used to securely transport large drawings and other documentation without damaging or distorting them. The tamper-evident tube comprises an outer tube, an inner tube, an outer cap, an inner tube cap, an inner tube locking mechanism, and an outer tube locking mechanism that is affixed to the peripheral surface of the outer cap.

Abstract: A tamper-evident cargo seal is disclosed, comprising a pin that is passed through a hasp on a shipping container, a body member, a pair of parallel guide members, at least one security label blank, and a cover. One end of the pin is keyed. The body member has a slot through a side surface extending into the interior, and is keyed to receive the pin. Abutting the top surface of the body member are two parallel guide members, bounding an area comprising the top surface of the body member. One of the guide members also has a slot to allow the pin to engage the slot in the body member. One or two removable security label blanks are inserted between the guides after the pin is inserted into the slot, and a security label is affixed over the blanks. A cover engages the body and guide members to protect the label.