摘要:
Techniques are provided for increasing spectral efficiency over data channels in a storage or communication system. In some embodiments, data may be encoded and transmitted over multiple channels. The transmitted data from the multiple channels may be considered together as a channel bundle, thereby increasing the edge transitions of the group of signals to improve clock recovery and reduce coding constraints. In some embodiments, the channel bit size is reduced to maximize data rates based on the reduced coding constraints. Furthermore, the channel bundle has only one channel with timing markers, so that a receiver may receive information from the channel bundle and recover clocking based on the timing markers in the one channel.
摘要:
Techniques are provided for increasing spectral efficiency over data channels in a storage or communication system. In some embodiments, data may be encoded and transmitted over multiple channels. The transmitted data from the multiple channels may be considered together as a channel bundle, thereby increasing the edge transitions of the group of signals to improve clock recovery and reduce coding constraints. In some embodiments, the channel bit size is reduced to maximize data rates based on the reduced coding constraints. Furthermore, the channel bundle has only one channel with timing markers, so that a receiver may receive information from the channel bundle and recover clocking based on the timing markers in the one channel.
摘要:
In an embodiment, a method of masking transaction data for a secure wireless transaction includes transmitting wireless pseudo transaction data that includes false transaction data and processing received pseudo transaction data and transaction data to extract or separate the transaction data.
摘要:
A method, system, and apparatus including a distribution transformer having a communication module. The distribution transformer is configured to convert a first high voltage electricity from a high voltage distribution line to a first low voltage electricity and convert a second low voltage electricity from a low voltage power line to a second high voltage electricity. The communication module is programmed to provide time data representing time of day information along the low voltage power line to an electrical device and provide location data representing location information along the low voltage power line to the electrical device. The location information includes a geographic location of the distribution transformer.
摘要:
Provided are methods and systems of using division-free duplexing (DFD) in a communication network. Techniques for applying DFD in a communication network may decrease bottlenecks in the network by allowing one or more network nodes to transmit and on substantially the same frequency and at substantially the same time. In one embodiment, one or more nodes in the network may be DFD enabled, and may be configured to operate in either a conventional mode or a DFD mode. The mode of operation of DFD enabled nodes may depend on the quality of signals transmitted to and/or received at the DFD enabled nodes. Further, the mode of operation may change dynamically, and may be substantially controlled by any suitable processor in the network.
摘要:
Provided are methods and systems of using division-free duplexing (DFD) to reduce rendezvous time between two or more cognitive radio devices. The cognitive radio devices may opportunistically use available frequency spectra by communicating over available channels. To communicate, a first device may rendezvous with a second device by transmitting a beaconing signal over a frequency on which the second device is listening. DFD techniques may enable each of the devices to listen to a channel while concurrently transmitting beacon signals over the same channel. As periods of listening and periods of transmitting over the same channel need not be separated due to the transmitter cancelling approach used in DFD techniques, rendezvous time may be significantly reduced. Further, embodiments include a generalized DFD (GDFD) approach wherein devices listen to a broad band of frequencies, thus further reducing rendezvous time.
摘要:
A method, system, and apparatus including a distribution transformer having a communications module. The distribution transformer is configured to convert a first high voltage electricity from a high voltage distribution line to a first low voltage electricity and convey the first low voltage electricity along a low voltage line to an electrical device. The communications module is configured to transmit a load reduction request along the low voltage line to the electrical device.
摘要:
A method, system, and apparatus including a distribution transformer having a communication module. The distribution transformer is configured to convert a first high voltage electricity from a high voltage distribution line to a first low voltage electricity and convert a second low voltage electricity from a low voltage power line to a second high voltage electricity. The communication module is programmed to provide time data representing time of day information along the low voltage power line to an electrical device and provide location data representing location information along the low voltage power line to the electrical device. The location information includes a geographic location of the distribution transformer.
摘要:
A full-duplex RF communication system and corresponding methods use digital adaptive filters for interference cancellation. As provided, the techniques allow full-duplex radio frequency communication without frequency-, time-, or code-division multiplexing and without the use of hardware RF cancellers. Such techniques may be useful for wireless communication, such as cellular communication, radio communication, broadcasting, short-range point-to-point communication, wireless sensor networks, and wireless computer networks.
摘要:
Provided are methods and systems of managing vertical handoffs in a wireless communication network. Embodiments include analyzing wireless device usage to determine usage patterns, which may include locations and times at which the wireless device is typically accessing the network. The network may recognize points in the usage patterns at which signal quality parameters are typically reduced. Such reductions in signal quality parameters may lead to inefficient vertical handoffs. The network may decrease adverse effects of inefficient vertical handoffs by reducing ping ponging, selecting links between wireless devices and network nodes, or indicating to a user of the wireless device that delays and/or data loss may occur.