Abstract: A communication system transitions from a high velocity mode of operation to a non-high velocity mode of operation based on a movement of a mobile station. When the communication system is in a high velocity mode of operation, the communication system promotes pilots from a High Velocity Neighbor Set of the mobile station or a controller. When the communication system is in a non-high velocity mode of operation, the communication system promotes pilots from a Neighbor Set of the mobile station or the controller. The communication system may further include a high velocity repeater that, when co-located with the mobile station, is capable of providing a communication link between the mobile station and a radio access network servicing the mobile station.

Abstract: An optimal operating point of an envelope tracking amplification system that includes a radio frequency (RF) power amplifier having an RF amplifying element is determined based on an application to the RF power amplifier of a supply voltage that is less than the rated voltage of the RF amplifying element.

Abstract: A feedforward amplifier circuit (30) compensates for distortion introduced into an amplified input carrier signal (34) by amplifying and feedforwarding a distortion signal component from one or more of the amplifiers (32a-32n) in an amplifier array (32) used to amplify the input carrier signal (34). Specifically, a main power amplifier (31) includes a plurality of combined power amplifiers (32a-32n) for amplifying the input carrier signal (34) to create an amplified carrier signal with a carrier signal component and a distortion signal component. The amplified carrier signal (34) is amplified on a main output path.

Abstract: A power amplifier circuit (30, 60) improves the linearity of an amplified output signal. The power amplifier circuit (30, 60) includes an input (33, 63) for receiving a carrier signal (34, 64) and an array of combined amplifiers (32, 62) of a predetermined type for amplifying the carrier signal (34, 64). At least one amplifier (48, 78) of the predetermined type is located between the input (33, 63) and the array of combined amplifiers (32, 62) for amplifying the carrier signal (34, 64) to produce a predistorted carrier signal (34b1, 64b1) with a carrier signal component and a distortion component to condition the carrier signal (34, 64) for input into the array of combined amplifiers (32, 62), and specifically to compensate for nonlinearities produced by the array of combined amplifiers (32, 62).

Abstract: A power amplifier circuit (30, 60) improves the linearity of an amplified output signal. The power amplifier circuit (30, 60) includes an input (33, 63) for receiving a carrier signal (34, 64) and an array of combined amplifiers (32, 62) of a predetermined type for amplifying the carrier signal (34, 64). At least one amplifier (48, 78) of the predetermined type is located between the input (33, 63) and the array of combined amplifiers (32, 62) for amplifying the carrier signal (34, 64) to produce a predistorted carrier signal (34b1, 64b1) with a carrier signal component and a distortion component to condition the carrier signal (34, 64) for input into the array of combined amplifiers (32, 62), and specifically to compensate for nonlinearities produced by the array of combined amplifiers (32, 62).

Abstract: A feedforward amplifier circuit (30) compensates for distortion introduced into an amplified input carrier signal (34) by amplifying and feedforwarding a distortion signal component from one or more of the amplifiers (32a-32n) in an amplifier array (32) used to amplify the input carrier signal (34). Specifically, a main power amplifier (31) includes a plurality of combined power amplifiers (32a-32n) for amplifying the input carrier signal (34) to create an amplified carrier signal with a carrier signal component and a distortion signal component. The amplified carrier signal (34) is amplified on a main output path.

Abstract: The invention is directed to a simulation and modelling approach, which comprises two parts. The first part comprises a generic mathematical model used to simulate or model a system and elements of the system interacting with a predetermined environment. The second part comprises at least one user defined data file that contains not only predetermined parameters (scalars values and/or tables with fixed independent variables) for use by the first part, but which also contains executable mathematical equations and respective data relating to an element of the system. These user-defined algorithmic expressions add to and complement the generic mathematical model so as to produce, when operating together numerical output that simulates or models the behaviour of the one or more elements of the system in a predetermined environment. Typically computer programs interact with the invention to provide a visualisation tools for the numerical output provided.

Abstract: A round baler includes bale forming mechanism and a crop delivery apparatus for delivering crop material to the bale forming mechanism. A clutch is provided for drivingly disconnecting the bale forming mechanism and delivery apparatus from the driveline while the tailgate is raised to discharge a wrapped bale. Engagement and disengagement of the clutch is controlled by a piston and cylinder assembly, and raising and lowering of the tailgate is controlled by a pair of piston and cylinder units. The baler is provided with a hydraulic sequencing circuit that connects the clutch assembly and the tailgate units to a common source of pressurized fluid. Moreover, the sequencing circuit controls fluid flow to the assembly and the units so that the clutch is disengaged before the tailgate is raised and the clutch is not re-engaged until the tailgate has been closed.

Abstract: A method and apparatus for efficient power amplification of a wideband signal with a correspondingly wide modulation bandwidth includes an envelope detector (220), an interleaved class S modulator (270), and a power amplifier (260). The interleaved class S modulator (270) amplifies includes multiple channels (272) which each include a portion of a class S modulator. Each class S modulator has a duty cycle and time offset associated therewith. The duty cycles of the channels (272) can be the same with the time offsets different, or the duty cycles can also be different. For an interleaved class S modulator with N channels (272), the slew rate increases by as much as N, and the output ripple decreases by as much as N.sup.2.

Abstract: The bale pusher mechanism of a round baler has a one-way safety breakaway latch between the push bar that engages the ejected bale and the actuator that operates the push bar. During the pushing stroke of the push bar, the latch cannot unlock, but during the return stroke if the push bar hangs up on the bale for any reason, the relief spring of the latch can yield to allow the push bar to disconnect itself from the actuator and remain engaged with the bale. As the baler is driven forwardly a short distance with the tailgate raised, the unlatched push bar rides harmlessly across the top surface of the bale until it completely clears the bale. In most cases the push bar will then easily relatch itself with the actuator by gravity.

Abstract: A round baler has a pickup header that is wider than the baling chamber and its inlet so that over-width windrows can be picked up by the machine in spite of its relatively narrower chamber. In order to reduce the width of the crop stream for introduction into the chamber, the machine is provided with a pair of laterally spaced apart, axially aligned, transverse stub augers that engage opposite outboard margins of the stream and converge them inwardly toward the main body of the flow. At the point where the outboard materials are discharged into the central body of the stream, a stuffer mechanism takes control of the stream and charges the materials up into the baling chamber. The augers are driven in such a direction that their front portions rotate down and under the auger shafts so that the outboard crop materials are likewise fed down and under the augers as they are converged toward the center.

Abstract: An optical transmission system allows for the remote determination of the total output power of each repeater. The optical transmission system includes two terminals, an optical path that transmits a plurality of optical signals between the two terminals, and a plurality of repeaters spaced along the optical path. In each of the repeaters, pilot signals are inserted by impressing them upon the amplified optical signals output from the repeater. The pilot signals are derived from an oscillator whose frequency is unique to the repeater in which the pilot signals are inserted. The magnitude of each pilot signal is proportional to the output power of its associated repeater. Each terminal provides a measurement of the total power output from each repeater using a receiving device. The receiving device selects the unique oscillator frequency for each of the repeaters desired to be measured, and measures the pilot signals at the selected frequency.

Abstract: The connection aid takes the form of a spring-loaded stand that is attached to the tongue of an implement for cradling support of the driveline at or near the height of the power take-off shaft of the tractor when the implement is not connected to the tractor. The driveline and the power take-off shaft can be readily aligned and reconnected when the implement is to be hitched to the tractor by simply pushing down on the driveline against the spring-loading of the stand or by slightly lifting the driveline with the help of the spring-loading of the stand to the extent necessary. Once the driveline has been connected, the stand may be swung down out of the way and into a stowed position substantially recessed below the top surface of the tongue.

Abstract: A round baler having a wrapping apparatus for wrapping bales with twine includes a twine dispenser moveable generally between the sidewalls for dispensing at least one strand of twine around the bale. The wrapping apparatus includes a retractable twine guide for spacing the twine wrapped around the bale a certain distance from one of the sidewalls. The guide is shiftable into and out of an operating position, in which the guide engages and maintains the twine the distance from the one sidewall. The wrapping apparatus further includes a twine cutter for severing the twine at the end of each wrapping cycle. Power mechanism, such as a hydraulic cylinder, is provided for simultaneously operating the twine cutter and the twine guide.

Abstract: A round baler includes a tension assembly for applying pressure evenly across the periphery of the bale as it grows within the baling chamber. The tension assembly includes a rotatable torque tube extending between the sidewalls and only one tensioning mechanism, such as a hydraulic cylinder, adjacent one of the sidewalls of the baler for supplying a yieldable resistance load in opposition to torsional loads on the torque tube. A load transferring member extends inwardly from the one sidewall to operably connect the single tensioning mechanism to the torque tube at a location spaced between the sidewalls and thereby transfer the loads between the mechanism and tube.

Abstract: A method and apparatus for generating a modulated signal include a pulse modulation source (215), a pulse modulator (20) for modulating a pulsed signal, a high efficiency power amplifier (230) for amplifying the modulated pulsed signal, and a harmonic reduction filter (240) for passing the switching frequency of the pulsed signal as the RF carrier. The pulse modulation source (215) accepts baseband inphase and quadrature signals and determines phase values and duty ratios for modulating the pulsed signal. The pulse modulator (20) phase modulates and duty cycle modulates the pulsed signal before it is amplified and filtered. A quadrature demodulator (260) produces baseband inphase and quadrature feedback signals for increased linearity.

Abstract: A pickup header (18) has upwardly arched, inversely U-shaped gauge wheel support arms (24,25) that secure the gauge wheels (22,23) to opposite ends of the pickup header (18). Each gauge wheel support arm (24,25) includes a first depending leg member (50) attached to the outboard side (46) of its gauge wheel (22,23) and a support section (52) that is attached proximal to the end of the pickup header (18). Each gauge wheel support arm (24,25) extends over the top of its gauge wheel (22,23) and attaches to the outboard side (46) of the gauge wheel (22,23), thus eliminating any "pinch-zones" between the gauge wheels and the pickup header.

Abstract: The round baler has a plurality of transverse rolls and a plurality of laterally spaced belts entraining the rolls, wherein the rolls and belts cooperatively define a baling chamber expandable from an initial, generally upright, bale-starting configuration. The baling chamber has a crop intake opening adjacent the bottom of the chamber through which crop material is delivered to the chamber during formation of a bale. The rolls include a lower front roll and a lower rear roll which are located behind the intake opening. The lower rear roll has a bale supporting surface that is positioned generally upwardly and rearwardly from the front roll for supporting the bale during formation thereof at a point spaced upwardly and rearwardly from the intake opening.

Abstract: A round baler includes a bale shape monitor for facilitating uniform bale formation. The bale shape monitor includes a pair of end sensors and an intermediate sensor. The end sensors sense the diameter of the bale at end locations adjacent opposite ends of the bale, while the intermediate sensor senses the diameter of the bale at an intermediate location spaced between the end locations. The monitor further includes a signal responsive to the sensors to indicate to the operator when the diameter of the bale at one of the end locations is less than the diameter at the intermediate location. The signal is electrically powered and includes a pair of switches, each of which is operably coupled between one of the end sensors and the intermediate sensor to operate an indicator when the diameter of the bale sensed at the corresponding end location is less than the diameter sensed at the intermediate location.

Abstract: The vertical chamber of the open throat, vertical chamber baler has its bottom inlet opening devoid of a starter roll. A resilient rotary rake tine assembly positioned below and ahead of the inlet opening picks up crop material from the ground and delivers it to a rigid tooth feeder spaced below the inlet opening in vertical alignment therewith. At the beginning of each bale forming cycle when the chamber is small and empty, the rigid tooth feeder propels the crop material into the chamber and against the upwardly moving rear belt stretch which encourages the material to tumble forwardly against the downwardly moving front belt stretch. The oppositely moving surfaces presented by the front and rear belt stretches encourage the tumbling material to coil into a bale core, which ultimately forms a larger bale.