Abstract: The present disclosure relates to a natural fiber plastic composite precursor material comprising 80-95% (w/w) cellulosic fibers having an average fiber length less than 1 mm, 3-7% (w/w) coupling agent, 0-7% (w/w) thermoplastic polymer, and 0-1% (w/w) lubricant and/or wax, wherein the material is in form of pellets having a bulk density in the range of 300-700 g/l, and to a method for preparing thereof. The present disclosure also relates to a method for preparing a natural fiber plastic composite product.

Abstract: A method and an apparatus is provided for allocating channels in a multi-user environment for transmitting real-time data traffic in a wireless packet data network. The method includes determining an a priori data rate per channel for each of a plurality of mobile stations based on channel state information associated with a plurality of frequency channels associated with the plurality of mobile stations and a preliminary assumption of a uniform power distribution among the plurality of frequency channels at a transmitter. The method also includes allocating a unique frequency channel from said plurality of frequency channels to at least one of the plurality of mobile stations based on said a priori data rate per channel for each of the plurality of mobile stations.

Abstract: The invention relates to a method for recovering a bit stream from a radio signal (2, 3, 4) received in a first receiving station (S1) and at least one further receiving station (S2, S3), the method comprising the steps of: in each of the receiving stations (S1 to S3), demodulating the received radio signal (2, 3, 4) to form a demodulated data stream (B, B?, B?), transferring the at least one demodulated data stream (B?, B?) from the at least one further receiving station (S2, S3) to the first receiving station (S1), in the first receiving station (S1), generating a combined data stream from the demodulated data streams (B, B?, B?) of each of the receiving stations (S1 to S3), and performing a hard decision on the combined data stream for recovering the bit stream.

Abstract: The invention relates to a method for recovering a bit stream from a radio signal (2, 3, 4) received in a first receiving station (S1) and at least one further receiving station (S2, S3), the method comprising the steps of: in each of the receiving stations (S1 to S3), demodulating the received radio signal (2, 3, 4) to form a demodulated data stream (B, B?, B?), transferring the at least one demodulated data stream (B?, B?) from the at least one further receiving station (S2, S3) to the first receiving station (S1), in the first receiving station (S1), generating a combined data stream from the demodulated data streams (B, B?, B?) of each of the receiving stations (S1 to S3), and performing a hard decision on the combined data stream for recovering the bit stream.

Abstract: The present invention provides a method and an apparatus for measuring a reception quality on a wireless communication link to a receiver by removing a bias in a plurality of received pilot symbols and obtaining a channel estimate for a channel, such as a wireless propagation channel, after substantially removing the bias. For a receiver, such as a rake receiver disposed in a base transceiver station, a bias removal module may extract a plurality of coefficients from a wireless propagation channel to remove a bias before a detector may receive the plurality of pilot symbols in the data stream to determine an error rate of the received pilot symbols where channel estimation is based on the received pilot symbols. In this manner, a systematic flaw in a link quality measurement based on an error rate of the received pilot symbols may be resolved for wireless communication systems.

Abstract: A method of limiting at least one peak of a composite signal having multiple carriers signals involves placing energy in at least one bandwidth gap located between respective frequency bandwidths of carrier signals.

Abstract: Improved frequency utilization in a radio network is achieved by using a radio system with a plurality of base stations, which respectively have at least one transmitter and one receiver, each base station being assigned at least one dual-polarized antenna. More efficient utilization of the available frequency band, and consequently a reduction in the cluster size, is made possible by the dual-polarized antenna being assigned a polarization modulator for changing at predetermined points in time the polarization state of a transmit signal to be transmitted.

Abstract: The invention relates to a method and a device for processing signals of a digital transmission system in general, and for estimating the frequency offset of the transmission system in particular. In one embodiment, the method according to the invention estimates the pulse response of the transmission system and shortens the pulse response by means of a variable prefilter. The duration of the shortened pulse response is, in particular, shorter than the duration of a known symbol sequence which is transmitted twice identically within one method cycle. By comparing samples of the received signal which correspond to the known identical symbols, the frequency offset is estimated reliably, and suitable measures can be taken to compensate it. Consequently, the efficiency of the receiver is substantially improved with respect to the recovery of the transmitted data.

Abstract: System and method for ascertaining the emergency running condition of a pneumatic tire on a motor vehicle. The system includes at least one sensor device arranged at least on each axle. The at least one sensor device is adapted to supply a permanently present first periodic oscillation proportional to a wheel rotation speed as a speed output signal. The at least one sensor device includes one of an active and a passive magnetic field sensor being mounted to one of rotate with the tire and be stationary. The transmitter device is arranged complementary to the at least one passive and active magnetic field sensor and is adapted to produce a periodic magnetic field change in proportion to the wheel rotation speed in a detection range. At least one signal processing device is used for processing and evaluating the speed output signal.

Abstract: The invention relates to a method for transmitting data in a data transmission system. The invention also relates to a data transmission system which includes a receiver (2) and at least one transmitter (4a to 4d). The receiver (2) is operable in a stand-by mode and in a data-receive mode and transfers with the aid of a switch-on signal from the stand-by mode into the data-receive mode. The transmitters (4a to 4d) transfer, via a data transmission, information to the receiver (2) as to when, after this data transmission, the next data transmission is to be expected from the corresponding transmitter (4a to 4d). The switch-on signal is generated in the receiver (2) shortly ahead of the time point at which the next data transmission is to be expected from the transmitters (4a to 4d) so that the receiver (2) transfers from the stand-by mode into the data-receive mode.

Abstract: The invention relates to a method for monitoring the air pressure of a tire of a motor vehicle with a tire pressure control system. The invention further relates to a motor vehicle having a tire pressure control system with which the method can be carried out. The tire pressure control system includes tire pressure control devices (4a to 4d) on each of the wheels (2a to 2d), which transmit to a central unit, at regular intervals, a data transmission which contains, inter alia, the air pressure measured in the tires. The central unit generates a warning signal when the determined air pressure deviates by more than a pregiven amount from the stored air pressure. The motor vehicle contains a second tire pressure control system which operates independently of the first tire pressure control system and monitors the air pressure in the tires of the motor vehicle at least when a transmission pause, which is too long, occurs between two data transmissions of one of the tire pressure control devices (4a to 4d).

Abstract: The invention relates to a method for carrying out the allocation of tire pressure control devices (4a to 4d) to wheel positions in a tire pressure control system of a motor vehicle. Each tire pressure control device (4a to 4d) transmits, at certain time intervals, its individual identifier and a lengthened high frequency signal to the central unit (10) of the tire pressure control system. The high frequency signals have an individual trace which is dependent upon the rotational angle of the wheel and on the time because of the geometry of the wheel box and as a consequence of the rotation of the wheel. In the central unit (10), a time point is fixed from two sequential high frequency signals at which the wheel assumes the same angular position in each case with this wheel being the wheel from which the signals were transmitted. The corresponding wheel has made an integer number of revolutions between the two time points.

Abstract: Improved frequency utilization in a radio network is achieved by using a radio system with a plurality of base stations, which respectively have at least one transmitter and one receiver, each base station being assigned at least one dual-polarized antenna. More efficient utilization of the available frequency band, and consequently a reduction in the cluster size, is made possible by the dual-polarized antenna being assigned a polarization modulator for changing at predetermined points in time the polarization state of a transmit signal to be transmitted.

Abstract: The invention relates to a method and a device for processing signals of a digital transmission system in general, and for estimating the frequency offset of the transmission system in particular. In one embodiment, the method according to the invention estimates the pulse response of the transmission system and shortens the pulse response by means of a variable prefilter. The duration of the shortened pulse response is, in particular, shorter than the duration of a known symbol sequence which is transmitted twice identically within one method cycle. By comparing samples of the received signal which correspond to the known identical symbols, the frequency offset is estimated reliably, and suitable measures can be taken to compensate it. Consequently, the efficiency of the receiver is substantially improved with respect to the recovery of the transmitted data.

Abstract: The invention relates to a method for determining the rotational speed of a motor vehicle wheel (4), which rotates about a rotational axis (2), by an acceleration sensor (10). The acceleration sensor (10) is mounted on the motor vehicle wheel (4) at a spacing (r) to the rotational axis (2) in such a manner that the force-sensitive axis of the acceleration sensor (10) is perpendicular to the rotational axis and is perpendicular to the centrifugal force which acts on the acceleration sensor (10) with a rotation of the motor vehicle wheel (4) about the rotational axis (2). The rotational speed of the motor vehicle wheel (4) is measured in that the rotational axis (2) is aligned horizontally so that a periodic measurement signal is generated in the acceleration sensor (10) by the gravitational force. The frequency of the measurement signal corresponds to the rotational speed of the motor vehicle wheel (4) about the rotational axis (2).

Abstract: The invention is directed to a method for allocating the wheel positions to air pressure control devices (6a to 6d) in an air pressure control system and is directed to an air pressure control system for carrying out the method. First measuring devices are provided which are permanently allocated to air pressure control devices 6a to 6d, and a second set of measuring devices 4a to 4d is provided which are permanently assigned to the wheel positions of the motor vehicle. The first measuring devices and the second measuring devices measure a same measurement value. The measurement values measured by the first measuring devices 16a to 16d and the measurement values measured by the second measuring devices 4a to 4d are transmitted to a central unit 10. In addition, the air pressure control devices each transmit an individual identifier to the central unit 10.

Abstract: An apparatus for controlling a photogrammetrical camera includes a frosted glass adjacent to which or in an optically conjugate plane thereto a transparent planoparallel sheet of voltage sensitive material is arranged. Spaced electrodes are allocated to the one face of said sheet and a sheet electrode to the other face. Each of the spaced electrodes is connected to respective outputs of an electronic counter, which in dependence of a tunable pulse generator applies voltage pulses to the spaced electrodes and the sheet electrode, both sandwiching said sheet of voltage sensitive material and rendering visible the inbetween portions of said material when submitted to a potential so that lines or a cyclic pattern of lines appear. The voltage sensitive material can be liquid or gaseous or solid and can be sandwiched between two substantially plano-parallel plates which have the respective electrodes or electrode on their inner faces.

Abstract: The specification discloses a prefabricated wall system providing a wall frame to which plastering or a covering of dry wall sheeting may be applied. The system includes a series of wall frame sections, preferably formed from steel channel members, which sections are spaced apart and supported therebetween by channel spacers having stop means which abut the sections. Each wall frame section has vertical studs secured at top and bottom by horizontal stringers. The stringers may include an elongated slot extending for their complete length to admit utility connections within the wall and to allow cutting and telescoping of the stringers for shortening the wall section. Concealed, slotted channels may be secured to the studs intermediate the edges of the sheet covering material to provide support for shelving along the finished walls.