Abstract: The invention concerns a method and a device for receiving a signal transmitted by a source by means of a plurality of antennas, in which a plurality of beam signals are obtained by weighting the signals received by the different antennas. The beam signals are correlated with the replica of a reference signal transmitted by the said source and then combined by means of coefficients obtained from correlation results.

Abstract: A method of reducing base station overloading consists of a series of sequential steps, beginning with reducing the decibel size of the handover window, base station exclusion, only one base station being excluded at a time, mobiles not in soft handover not being excluded, and if more than one base station in the active set is overloaded, excluding the station which has the strongest received power from the active set.

Abstract: In the mobile radio communication system where the UMTS and an another system coexist an idle slot for observing the frequency component of another system is inserted in one superframe of UMTS. The duration of this idle slot is at most half of the duration of one frame that form the superframe and it is inserted at an interval of a specified number of frames. Therefore, the frequency component of the another system can be observed securely from the UMTS. Further, deterioration of interleaving performance of the compressed mode frames during such observation can be suppressed.

Abstract: In the mobile radio communication system where the UMTS and an another system coexist an idle slot for observing the frequency component of another system is inserted in one superframe of UMTS. The duration of this idle slot is at most half of the duration of one frame that form the superframe and it is inserted at an interval of a specified number of frames. Therefore, the frequency component of the another system can be observed securely from the UMTS. Further, deterioration of interleaving performance of the compressed mode frames during such observation can be suppressed.

Abstract: Method of allocating transmission resources Allocation method for allocating transmission resources to a plurality of communications between a base station and a plurality of mobile terminals in which, for a communication with a given mobile terminal, a transmission resource allocation criterion is selected from amongst a plurality of predetermined criteria, the selection of the said criterion being made using a quantity characteristic of the propagation losses between the said mobile terminal and the base station.

Abstract: The invention relates to a process for the demodulation of signals representative of sequences (SE1 to SEN) transmitted in a communications system, which includes determining a correlation value (a1 to an), deducting from the correlation values (a1 to an) a confidence value (w1 to wN), and deducting from the confidence values (w1 to wN) soft decision values (C1 to Ck) to be used for each element of the demodulated symbol.

Abstract: Method of obtaining a gain function by means of an array of antennae and a weighting of the signals received or to be transmitted by vectors ({overscore (b)}) of complex coefficients, referred to as weighting vectors, according to which, a reference gain function being given, the said reference gain function is projected orthogonally onto the sub-space of the gain function generated by the said weighting vectors of the space of the gain functions, provided in advance with a norm, and a weighting vector generating the reference gain function thus projected is chosen as the optimum weighting vector.

Abstract: Method of obtaining a transmission gain function by means of an array of antennae, a signal to be transmitted by the array being weighted by a vector ({overscore (b)}d) of N complex coefficients, referred to as the transmission weighting vector, N being the number of antennae in the array, the array transmitting to a telecommunication terminal over a transmission channel, referred to as the downlink channel, a downlink transmission signal (Sd) and the said terminal transmitting to the said array over a transmission channel, referred to as the uplink channel, an uplink transmission signal (Su), the said downlink channel being disturbed by an isotropic noise (N′) and/or a directional noise, referred to as the downlink interference (Id), the said transmission weighting vector ({overscore (b)}d) being determined by means of a matrix product from a noise power matrix (Dd) which is a function of the power of the said isotropic noise and/or of the power of the said directional noise and a vector ({overscore (C

Abstract: Method of obtaining a transmission gain function by means of an array of antennae and a weighting of the signals received or to be transmitted by vectors ({overscore (b)}) of N complex coefficients, referred to as weighting vectors, N being the number of antennae in the array, the array transmitting, to a telecommunication terminal on a transmission channel, referred to as the downlink channel, a downlink transmission signal (Sd) and the said terminal transmitting to the said array on a transmission channel, referred to as the uplink channel, an uplink transmission signal (Su), the said uplink channel being disturbed by a first isotropic noise (N) and/or a first directional noise, referred to as the uplink interference (Iu), the said downlink channel being disturbed by a second isotropic noise (N′) and/or a second directional noise, referred to as the downlink interference (Id), a first weighting vector ({overscore (b)}u) having been determined in order to maximise, on reception by the array, the ratio

Abstract: Method of estimating a downlink channel between a base station and a mobile terminal in a mobile telecommunication system, according to which the said base station estimates the uplink channel between the said mobile terminal and the said base station, deduces, from the variations in the uplink channel, those in the downlink channel and estimates at a second instant the said downlink channel from an initial estimation at a first instant and variations in the said downlink channel between the said first and second instants.

Abstract: The present invention relates to a method of random access by a user to a resource shared according to a protocol of the ALOHA type, the instant of transmission of a data packet by the user being supplied by at least one random variable, in which certain time ranges of access to the resource have been the object of prior booking.

Abstract: The invention relates to a method for the synchronization of at least one mobile station with a base station within a mobile telecommunication network. According to the invention, it is proposed to intensify the synchronization signal at regular intervals during a short time interval called reinforced synchronization interval or RSI interval. The cycle of activity of the synchronization channel of the base station is thus increased on a time interval corresponding to the reinforced synchronization interval. This will reduce the effective time of acquisition of the synchronization signal and thereby reduce the size or number of time windows needed for this acquisition. The cycle of activity of the synchronization channel is increased by increasing the number of synchronization bursts during the RSI interval. Application to UMTS-FDD type third-generation telecommunication networks.

Abstract: The invention consist in a simulation method for the resolution of the power control convergence problem.

Abstract: The present invention applies to a radiotelecommunication system, notably of the cellular mobile radiotelephony system type, having a plurality of fixed base stations communicating with a plurality of mobile units, each of the said base stations defining a cell and having a transmission and reception antenna whose beam covers a sector in which the said mobile units can communicate with the said base station, the said antenna being able to be inclined so as to modify the said sector covered.

Abstract: The present invention concerns a telecommunication system for mobiles of the type which has a network of base stations to which the said mobiles can be connected and which is designed so that a mobile connected to a base station sends to the said base station, besides user signals, power control commands in order that the said base station controls its own transmission power so that the power received therefrom by the said mobile is equal to a predetermined value.

Abstract: The present invention concerns a method of determining the position of a mobile station in a mobile telecommunication network, the said network including a plurality of base stations designed to adopt at least on the one hand a state corresponding to periods of transmission of signals useful to the determination of the said position, the said mobile station, on reception of the said useful signals, making measurements of quantities of the said useful signals which are characteristic for using a position determination method and on the other hand a state corresponding to periods of silence during which no signal is transmitted.

Abstract: The present invention concerns a system for controlling the transmission power of a base station with which a number of mobile stations are in communication, said base station having power command units which receive respectively the signals intended for said mobile stations and power command signals sent by said mobile stations for commanding the contribution of said signal to the transmission power of said base station, and a summer (10) for forming a composite signal from said signals delivered by said power command units.