Abstract: An architecture, system and associated method and apparatus for securely communicating authentication data to a communication device. In one embodiment, the method includes modulating a spectral source's radiation using the authentication data, wherein the spectral source's radiation is adapted to operate as a first transmission medium for carrying the authentication data, the first transmission medium being containable within an enclosure that inhibits passage of the spectral source's radiation (i.e., spectrally opaque enclosure). The modulated authentication data is transmitted via the first transmission medium to the communication device disposed in the spectrally opaque enclosure.

Abstract: Embodiments are disclosed for improved systems and methods for encoding and decoding information transmitted using multiple-input-multiple-output (MIMO) communication devices. Structurally sparse codes are implemented based on principles of compressive sampling. Improved detectors are also disclosed for implementing basis pursuit and basis pursuit with runner-up detection techniques.

Abstract: Multi-user sparse space codes are proposed as a new transmission scheme for uplink communication over a multi-user multiple-input-multiple-output (MIMO) communication channel.

Abstract: A multi-level coding and iterative decoding scheme using sparse space codes as the inner-code and codes amenable to belief propagation decoding methods (such as low-density parity-check (LDPC) codes, turbo codes, and trellis codes) as the outer-code is proposed for MIMO communication channels.

Abstract: An architecture, system and associated method and apparatus for securely communicating authentication data to a communication device. In one embodiment, the method includes modulating a spectral source's radiation using the authentication data, wherein the spectral source's radiation is adapted to operate as a first transmission medium for carrying the authentication data, the first transmission medium being containable within an enclosure that inhibits passage of the spectral source's radiation (i.e., spectrally opaque enclosure). The modulated authentication data is transmitted via the first transmission medium to the communication device disposed in the spectrally opaque enclosure.

Abstract: Multi-user sparse space codes are proposed as a new transmission scheme for uplink communication over a multi-user multiple-input-multiple-output (MIMO) communication channel.

Abstract: A multi-level coding and iterative decoding scheme using sparse space codes as the inner-code and codes amenable to belief propagation decoding methods (such as low-density parity-check (LDPC) codes, turbo codes, and trellis codes) as the outer-code is proposed for MIMO communication channels.

Abstract: In some implementations, a method for wireless data communication includes detecting a short-range proximity of a device. In response to at least the detected short-range proximity, a connection to a mechanical assembly is emulated. A communication link including a wireless link is established with the device by transmitting a request according to a wired standard. Signals formatted in accordance with the wired standard are communicated with the device through the wireless link.