Patent
Method and apparatus for multi-mode infrared data transmission
Mark Devon,James L. Konsevich +1 more
TLDR
In this article, a correlation is established between a set of symbols and the corresponding signal position/signal characteristic combinations, where each symbol has a corresponding pulse position and a corresponding signal characteristic.Abstract:
A method and apparatus for transmitting information over a wireless connection are provided. A correlation is established between a set of symbols and a set of pulse position/signal characteristic combinations. Thus, each symbol has a corresponding pulse position and a corresponding signal characteristic. The signal characteristic may be, for example, a particular frequency, amplitude or phase. To communicate a symbol, a device generates a signal in which a tone burst is sent during the pulse position that corresponds to the symbol. In addition, at least some portion of the signal reflects the signal characteristic that corresponds to the symbol. A receiving device determines the pulse position in which the tone burst was sent and determines the signal characteristic reflected in the signal. The receiving device then determines the symbol based on the pulse position and the signal characteristic. Synchronization is improved by generating synchronization tone bursts before each pulse position modulation frame. Inter-symbol interference is minimized by placing guard bands on each side of the synchronization pulse and/or between pulse windows in each pulse position modulation frame.read more
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Patent
Communications systems and methods
David Baker,Mark Justin Moore +1 more
TL;DR: In this article, an ultra wideband (UWB) network consisting of a plurality of UWB devices each forming a node of a network is defined, and a device controller coupled to a transceiver is configured to determine a UWB channel for use in establishing a communication link with each other UWB device.
Patent
Robust method and apparatus enabling multi-mode wireless optical communication
Abstract: Disclosed is an optical communication system enabling communication between several co-existing transmitting and receiving stations. In order to allow communication between the co-existing stations, a robust physical layer header (RPLH; 50) is employed which can be understood by all participating stations. This robust header (50) at least comprises a preamble (52) consisting of frames forming a periodic sequence of pulses, the number of slots per frame and the frame content being known to all participating stations. The preamble (52) serves for relative synchronization and carrier detection of the receiving stations. The robust header (50) further comprises a unique synchronization word (53) used for absolute synchronization of the receiving stations. This synchronization word (53) is followed by a control field (59) of fixed length and known structure. By means of this control field (59) the receiving stations are informed which modulation method will be used for the transmission of data. Under certain circumstances it is also useful to provide other control information in said control field (59) for communication link and network control. Furthermore, information may be exchanged to allow negotiation and/or adaptation of the data rate used for transmission. This allows to optimize the throughput depending on the conditions (quality) on the channel.
Patent
Wireless sensors in roll covers
TL;DR: In this article, an industrial roll includes a substantially cylindrical shell having an outer surface, a polymeric cover circumferentially overlying the shell outer surface; and a sensing system.
Patent
Managed connectivity in electrical systems and methods thereof
TL;DR: An electrical connector arrangement includes a storage device coupled to a connector housing as mentioned in this paper, which is configured to store physical layer information pertaining to the electrical connectors arrangement, and also has contacts that enable the layer information to be read from the storage device by a media reading interface.
Patent
Wireless infrared digital audio system
TL;DR: In this paper, a system for transmitting, receiving, recovering, and reproducing digitized samples of analog signals while concealing unrecoverable digital samples of the analog signals to maintain a level of fidelity in reproducing analog signals is presented.
References
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Patent
Optical communication system using pulse position modulation
TL;DR: In this article, an encoder and a decoder for converting between digitally encoded data and position modulated pulses are described, which use a counter driven by clock pulses at the time slot frequency to supply inputs alternately to two encoding logic circuits or two multiplexers.
Patent
High speed infrared communications system using pulse sets
TL;DR: In this article, an infrared communication system for transmitting a digital bit stream by telemetry in the presence of background radiation was proposed, where each bit in the data stream is represented by a signature set of pulses designating either a binary one or a binary zero.
Patent
Pulse position modulation communication system
TL;DR: In this paper, a modulo-M summing operation is used to replace the previously stored data for summation with the next received data, where the value of M is the same as the number of time slots in each time frame.
Patent
Dual channel telemetry for implanted medical device
TL;DR: In this article, a hand shake protocol is used to maintain the link over slight variations in programmer head position with an indicator notifying the operator when repositioning is required, and a cyclic redundancy code is used for link error detection.
Patent
Data transmission system
Joachim Kuhlmann,Helmut Moser +1 more
TL;DR: In this article, a complete binary word with a defined total bit number is subdivided into one or more partial binary words, with the respective bit numbers of the partial binary word being variable.