Abstract: Disclosed is a theme park system for vehicle driving, the system comprising an integrated operating server for: receiving sensor information, through one or more tracks including at least one sensor and a dedicated internal network used inside a theme park for vehicle driving, from the one or more tracks and one or more vehicles driving on the one or more tracks; receiving user information from one ore more user clients by using an external communication network which is not overlapped with the internal network; generating driving information on one or more vehicles by using the received sensor information; and managing the theme park system on the basis of the generated driving information and the received user information.

Abstract: Disclosed is a theme park system for vehicle driving, the system comprising an integrated operating server for: receiving sensor information, through one or more tracks including at least one sensor and a dedicated internal network used inside a theme park for vehicle driving, from the one or more tracks and one or more vehicles driving on the one or more tracks; receiving user information from one ore more user clients by using an external communication network which is not overlapped with the internal network; generating driving information on one or more vehicles by using the received sensor information; and managing the theme park system on the basis of the generated driving information and the received user information.

Abstract: Disclosed is a race car track for allowing non-powered driving by using gravity, the track comprising: a first lane including a first curved track; and a second lane including a second curved track located adjacently to the first curved track, wherein the first curved track has a first super elevation such that the first lane has a predetermined first difficulty level, and the second curved track has a second super elevation such that the second lane has a predetermined second difficulty level.

Abstract: Disclosed is a race car for performing non-powered driving by using gravity and momentary acceleration by using a power unit, the race car comprising: a first power device for supplying power to the race car during momentary acceleration; two one-way clutches connected to the first power device; and two wheels respectively connected to the two one-way clutches, wherein the two one-way clutches can respectively rotate at different speeds, and the power supplied from one first power device is simultaneously received during momentary acceleration through the one-way clutches respectively connected to the two wheels.

Abstract: An apparatus includes a frequency counter configured to receive an input signal containing pulses and to output a count value identifying a number of pulses in the input signal during a specified time period. The specified time period encompasses multiple cycles of the input signal. The apparatus also includes a comparator configured to receive the count value, compare the count value to a second value, and provide an output signal based on the comparison. The apparatus further includes a data latch configured to latch the output signal, where the latched value of the output signal represents a demodulated data value. The comparator could be configured to compare the count value to a fixed value associated with a desired frequency of the input signal. The comparator could also be configured to compare the count value in one specified time period to a stored count value from another specified time period.

Abstract: An apparatus includes a first oscillator configured to generate a reference signal and a second oscillator configured to generate an output signal having a controllable frequency. The apparatus also includes a frequency difference detector configured to generate a difference signal having a frequency based on a frequency difference between the reference signal and the output signal. The apparatus further includes a discriminator configured to modify the frequency of the output signal based on the difference signal. The frequency difference detector can be configured to generate the difference signal having multiple pulses. The discriminator can be configured to count a number of pulses in the difference signal during a specified time period and to modify the frequency of the output signal based on the counted number of pulses. The specified time period can be adjustable.

Abstract: An apparatus includes a first oscillator configured to generate a reference signal and a second oscillator configured to generate an output signal having a controllable frequency. The apparatus also includes a frequency difference detector configured to generate a difference signal having a frequency based on a frequency difference between the reference signal and the output signal. The apparatus further includes a discriminator configured to modify the frequency of the output signal based on the difference signal. The frequency difference detector can be configured to generate the difference signal having multiple pulses. The discriminator can be configured to count a number of pulses in the difference signal during a specified time period and to modify the frequency of the output signal based on the counted number of pulses. The specified time period can be adjustable.

Abstract: An example of a radio frequency (RF) transmitter system for communication may include a transmit pre-distortion module configured to provide a second transmit calibration signal during a transmit calibration mode based on a first transmit calibration signal and one or more transmit calibration adjustment signals. The one or more transmit calibration adjustment signals may include an offset parameter associated with DC offset and an imbalance parameter associated with at least one of gain and phase imbalances. The system may include a transmit channel frequency converter coupled to the transmit pre-distortion module. The transmit channel frequency converter may be configured to provide a fourth transmit calibration signal during the transmit calibration mode based on a third transmit calibration signal and a transmit reference signal.

Abstract: An example of a method for off-line calibration of a radio frequency (RF) communication system may include one or more of the following: enabling an off-line calibration mode for an RF communication system; generating an off-line calibration signal; applying to a frequency converter a first off-line calibration signal corresponding to the generated off-line calibration signal; translating the first off-line calibration signal into a second off-line calibration signal; evaluating one or more calibration adjustment signals associated with the calibration signal to reduce error in the communication system, wherein the one or more calibration adjustment signals may include an offset parameter associated with DC offset and an imbalance parameter associated with at least one of gain and phase imbalances; storing one or more calibration adjustment signals; disabling the off-line calibration mode; applying a communication signal; and adjusting the communication signal based on the stored one or more calibration adjus

Abstract: An example of a radio frequency (RF) receiver system for communication may include a receive channel frequency converter configured to provide a second receive calibration signal during a receive calibration mode based on a first receive calibration signal and a receive reference signal. The system may include a receive pre-distortion module coupled to the receive channel frequency converter. The receive pre-distortion module may be configured to provide a fourth receive calibration signal during the receive calibration mode based on a third receive calibration signal and one or more receive calibration adjustment signals. The one or more receive calibration adjustment signals may comprise an offset parameter associated with DC offset and an imbalance parameter associated with at least one of gain and phase imbalances.

Abstract: High-speed, high-performance, low-power transponders, serializers and deserializers are disclosed. A serializer may include a serdes framer interface (SFI) circuit, a clock multiplier unit, and a multiplexing circuit. A deserializer may include an input receiver circuit for receiving and adjusting an input data signal, a clock and data recovery circuit (CDR) for recovering clock and data signals, a demultiplexing circuit for splitting one or more data channels into a higher number of data channels, and a serdes framer interface (SFI) circuit for generating a reference channel and generating output data channels to be sent to a framer. The input receiver circuit may include a limiting amplifier. Each of the serializer and deserializer may further include a pseudo random pattern generator and error checker unit. The serializer and deserializer each may be integrated into its respective semiconductor chip or both may be integrated into a single semiconductor chip.

Abstract: A method includes receiving a first message at a router in a mesh network and synchronizing the router to a plurality of time slots using the first message. The method also includes repeatedly incrementing a network reference value at each time slot up to a maximum value and then decrementing the network reference value at each time slot down to a minimum value. In addition, the method includes broadcasting a second message at the router when the network reference value has a specific value that is associated with a unique identifier of the router.

Abstract: A radio frequency transceiver for off-line transmit and receive calibrations includes: a transmit pre-distortion module configured to receive a transmit calibration signal during a transmit calibration mode, a transmit communication signal during a transmit communication operation mode, and one or more transmit calibration adjustment signals; a transmit channel frequency converter; and a transmit calibration module configured to provide the one or more transmit calibration adjustment signals and the transmit calibration signal to the transmit pre-distortion module.

Abstract: A method includes receiving a request to identify any communication paths visible to a first router in a mesh network and broadcasting the request. The method also includes identifying one or more second routers that broadcast information received by the first router, where the one or more identified second routers are associated with the communication paths visible to the first router. The method further includes receiving at least one first response from at least one of the second routers, where the at least one first response identifies the communication paths visible to at least one of the second routers. In addition, the method includes broadcasting a second response at the first router, where the second response identifies the communication paths visible to at least one of the second routers and to the first router.

Abstract: An apparatus includes a plurality of resonators forming a filter. At least one of the resonators includes (i) a plurality of interdigital transducers positioned in a common acoustic track and (ii) a plurality of reflectors configured to reflect acoustic waves from the interdigital transducers back to the interdigital transducers. At least one reflector is positioned between adjacent interdigital transducers. The interdigital transducers in one of the resonators could be coupled in parallel or in series between an input and an output of that resonator.

Abstract: An asset subsystem is provided for use in a security system. The security system includes a security system controller operable to trigger an alarm. The asset subsystem includes a transceiver operable to communicate a first signal to a tag associated with an asset and to receive a second signal communicated by the tag in response to the first signal. The asset subsystem also includes a controller operable to determine whether the tag failed to communicate the second signal to the transceiver and trigger the alarm in response to determining that the tag failed to communicate the second signal to the transceiver.

Abstract: A fractional-N synthesized chirp generator includes a fractional-N synthesizer and a digital ramp synthesizer. The fractional-N synthesizer has a frequency synthesizer and a sigma-delta modulator module. The fractional-N synthesizer is configured to receive a reference frequency input signal and a frequency control value. The fractional-N synthesizer is configured to transform the reference frequency signal and the frequency control value to a chirped radio frequency (RF) output signal in a deterministic manner. The digital ramp synthesizer is configured to receive the reference frequency input signal and configured to generate the frequency control value utilizing the reference frequency input signal. The digital ramp synthesizer is further configured to provide the frequency control value to the fractional-N synthesizer. The frequency control value varies with time.