Abstract: A method for assembling machines using multiple, structurally equivalent components. The characteristics of each component are tested. The tested components are sorted into component classes using the test information. Individual components are selected from the classes and combined in a manner that, when combined, will provide desired price/performance characteristics in the machine. Machines with improved price/performance characteristics may be assembled without requiring change to the quality of the components, or the manner in which the components are manufactured.

Abstract: Transport frames to be transmitted on a communication channel are formed from coded-signal frames. Each coded-signal frame comprises one or more sets of bits to be protected against transmission errors. A respective error detection code is calculated for a subset of bits, and placed in a respective transport frame along with this subset of bits. Some at least of the transport frames contain a plurality of subsets of bits, emanating from different coded-signal frames and accompanied by the corresponding error detection codes.

Abstract: The invention relates to a method of estimating the speed (v) of a mobile station connected by a radio transmission channel to a remote station, said method including the following successive steps: receiving and filtering a transmission signal (s) to obtain a measuring signal reflecting time variations of said transmission channel, determining a correlation function (R(?)) of said measuring signal parametered by the mobile station speed (v), seeking the value (R?(0)) of the second derivation of said correlation function at the origin, estimating the first derivative (?0) of the measuring signal and calculating the variance (C) of the estimate, and identifying the results obtained during the preceding two steps (R?(0)=C).

Abstract: A device used to fix a rail to a motor vehicle floor pan. The device includes a mechanism to position one of the ends of the rail in relation to the floor pan before the rail is fixed to the floor pan.

Abstract: A laser-radar receiver comprising an array of optical fibers, wherein the opposite ends of the optical fibers are connected to at least one electromagnetic radiation detector, each of the optical fibers having differing physical characteristics which result in known delays in the transmission time of pulsed electromagnetic radiation.

Abstract: A base station forms a time-division multiplexing physical control channel comprising a set of presynchronization timeslots each carrying the same synchronization signal, and a set of synchronization supplement timeslots respectively associated with the presynchronization slots. Each synchronization supplement slot carries the same synchronization signal representing system information and furthermore a signal identifying said synchronization supplement slot, thereby enabling to complete the synchronization achieved on the basis of the presynchronization slots.

Abstract: In a packet switching data transmission network on the one hand, and in a public telephone network on the other hand, a station (14) is started, the networks being interconnected via a call server (15). The transmission network comprises an administration server (11), a plurality of subnets administered by the administration server and a plurality of stations (14), each linked to a subnet. The administration server stores a respective location information for each subnet. A station emits a lease request (301), destined for the administration server. Then, the station receives from the administration server, in response to the lease request, a lease (302) containing the location information of the subnet of the station. Next, the station emits, destined for the call server, a registration request (304) comprising an identifier of the station as well as the location information.

Abstract: The invention concerns a method for detecting voice activity in a digital speech signal, in at least a frequency band, for example by means of a detecting automaton whereof the status is controlled on the basis of an energy analysis of the signal. The control of said automaton, or more generally the determination of voice activity, comprises a comparison, in the frequency band, of two different versions of the speech signal one of which at least is a noise-corrected version.

Abstract: For each base station serving mobile stations in a cell, measurements carried out on radio channels in the cell are used to obtain values of a quantity compared to one or several associated parameters in a procedure managing radio resources allocated to the mobile stations. A statistic of the obtained values the quantity is maintained. The value of each associated parameter for the cell is adapted such that, according to the statistic, a predetermined fraction of the values of the quantity obtained from the measurements are higher than the associated parameter value.

Abstract: A method for detection and identification of defects in a weld seam created using a laser beam. According to this method, at least two measurement signals are acquired in real time delivered by optical sensors (C1 to C6) detecting variations in luminous intensity of the plasma formed by the laser beam (14). These signals are then combined by applying a mathematical operation. The combined signal obtained is then compared to a predetermined threshold. Depending on the result of this comparison, a determination is made of the presence or absence of a defect corresponding to the operator used.

Abstract: A transmitter produces radio signal bursts in periodic time slots allocated to a time-division multiplexed channel. The radio signal of each burst is made up of digital symbols comprising two training sequences enabling the receiver to estimate demodulation parameters and information symbols which the receiver can estimate by a demodulation applied using the estimated parameters. The two training sequences are placed at the start and the end of the burst so that the receiver uses them to demodulate the received signal in the order of the symbols and demodulate the received signal again in the reverse order of the symbols.

Abstract: In the case of a mattress provided with holding elements, a layer can be put on, which layer is provided with fixing means, the layer being removably attached to the mattress. The holding means comprise a long stretched-out, substantially longitudinally stable, flexible element, of which in each case two first regions are connected to the mattress, while second regions, situated in-between, are free. The respective spacing between two second regions is substantially constant; the fixing means are installed on the layer such that they each come to lie at a second region of the holding elements. The fixing means are connectible to the corresponding second regions of the holding elements. With this system, layers can be connected to the mattress in the simplest way.

Abstract: A method of estimating a communication path formed of a plurality of channels, the method necessitating an estimate of the impulse response C1, C2, . . . , Cn of the channels, including the following steps of (1) acquiring a space statistic of the transmission path, and (2) establishing a corrected impulse response (C1, C2, . . . , Cn) at least by weighting the impulse responce estimates (C1, C2, . . . , Cn) by the space statistic and an estimate of the additive noise (N01, N02, . . . , N0n) of the channels.

Abstract: Runs of loss cable are disposed in succession along a zone of radio coverage and coupled with feeder means from base stations of a cellular mobile communication network. The feeder means apply first radio frequency signals from a first base station to a first cable run and second radio frequency signals from a second base station to a second cable run, adjacent to the first run. They also apply at least part of the second radio frequency signals to the first cable run, preferably attenuated relative to the first radio frequency signals as applied to the first cable run, creating a zone of partial coverage between adjacent cells in order to facilitate operation of an automatic cell changeover during calls.

Abstract: A transmitter outputs a radio signal formed from a first baseband signal incorporating a synchronization signal. The recipient obtains a second baseband signal from the received radio signal, detects the synchronization signal in a portion of the second baseband signal in order to compute synchronization parameters and/or parameters for estimating a radio transmission channel, and uses the computed parameters to demodulate another portion of the second baseband signal and extract the transmitted information from it. The synchronization signal contains a synchronization pattern selected by the transmitter on the basis of signalling information to be supplied to the second station. The receiver searches several patterns in the second baseband signal in order to obtain the signalling information depending on the detected pattern.

Abstract: A radio station including two antennas combined with respective first and second hybrid transmission polarization couplers is disclosed. Each antenna is arranged to generate two orthogonal electric field components in response to two respective quadrature radio signals from the corresponding polarization coupler. The station further includes at least one hybrid distribution coupler with a first output connected to a first input of the first polarization coupler and a second output connected to a first input of the second polarization coupler and at least one radio signal source delivering a radio signal to a first input of the distribution coupler.

Abstract: Transcoder apparatus is designed to transcode a receive signal (UR) into a transmit signal (UE). For this purpose, it includes a signaling transmitting member (14) for producing a signaling message and for introducing it into the transmit signal by stealing bits from said signal. According to the invention, the signaling transmitter member (14) also comprises a tone generator (15) to add a tone signal (UTS) to the transmit signal (UE) prior to applying the signaling message to said transmit signal.

Abstract: A device for emitting digital video images may include a picture-taking unit for producing the images and a unit for forming at least one signal in the field of vision of the picture-taking unit so that the signal appears in at least some of the images produced by the picture-taking unit. The signal is formed to vary temporally, making it possible to detect any image freeze emitted by the device.

Abstract: The invention concerns a method for conditioning a digital speech signal(s) processed by successive frames, which consists carrying out a harmonic analysis to estimate the pitch on each frame where it has a speech activity, and in oversampling at an oversampling frequency (fe) which is a multiple of the estimated pitch.

Abstract: Discrete symbols of transmitted signals, forming part of the components of a vector D of size N, are estimated from a vector Y of L digital samples of a received signal. The vector Y may be broken down into Y=AD+YN, where A is a matrix of size L×N previously determined from measurements of at least one transmission channel reply and YN represents a vector of L noise samples. The method includes determining an upper triangular matrix T of size N×N and a vector Z of size N such that the quadratic criteria ∥TX−Z∥2 and ∥AX−Y∥2 are minimal for the same vector X of size N, and dividing the vector Z and the matrix T into blocks so as to operate a minimisation of the quadratic criterion block by block along the diagonal of matrix T.