The invention concerns a method for synchronising clocks of base transceiver stations in a telecommunications system and a mobile communications system. According to the invention, in either some or in all base station sites of the telecommunications network a location measurement unit is installed, which receives an accurate clock including an extra-system signal. The clock information is transmitted further to base transceiver stations, whose frame transmissions are synchronised in accordance ...

A data processing apparatus comprising a plurality of data processors, each data processor comprising: first logic operable in a first clock domain and further logic operable in a second clock domain, said first and second clock domains being asynchronous with each other; a synchronizer operable to synchronize a signal processed by said first logic to produce a signal synchronized to said second clock domain; a synchronized signal output operable to export from said data processor said synchroni...

A method and device for automatic synchronization of data bursts that is applicable to cordless communications systems with time division multiple access, TDMA, for synchronizing the timebases of cordless terminals and base stations. This device, which periodically receives for a short interval of time, a burst reception signal (A) to be synchronized, incorporates a register (1) which stores the value of a counter (3) when the burst reception signal (A) is high and subtracts from it, in an adder...

A low power RF receiver (1) has an antenna (2), a reception and shaping stage (3) for the radio-frequency signals provided by the antenna, a 12-channel correlation stage (7) receiving intermediate signals (IF) shaped by the reception stage (3), and a microprocessor (12) connected to the correlation stage for calculating X, Y and Z position, velocity and time data as a function of data provided by the radio-frequency signals, such as GPS signals, transmitted by satellites. Each channel includes a...

The present invention relates to a method of synchronisation between communication networks exchanging information by frame of informations, each communication network having clock and the number of clock pulses is monitored by a counter. The synchronisation is made by reading information representing the counted clock pulses of the clock of the first network at the appearance of a reference event, inserting at least said information or calculated information on the basis of said information int...

The invention concerns a synchronisation device for synchronising the analogue display with the digital display of a timepiece. The device includes a contact wheel (1), driven by the hour-wheel of the timepiece, on which is fixed a contact spring (2) with several arms (4, 6; 8, 10). The arms make contact with conductive strips (T1-T5) distributed according to a particular arrangement on a printed circuit board associated with the device according to the invention. Via the geometry of the arms, t...

The present invention relates to a transmission apparatus for transmitting OFDM-signals comprising modulation means 4 for modulating said signals onto a plurality of subcarriers using a OFDM-modulation method, transformation means 5 for transforming said modulated signals into the time domain, and transmission means for transmitting said signals, whereby in said modulation means every M-th subcarrier is modulated, wherein M is an integer and M.gtoreq.2. The present invention also relates to a co...

The method of transmitting data as a sequence of high bits and low bits over a transmission line from a transmitting device to a receiving device includes transmitting synchronization signals over the transmission line and transmitting one and only one high bit or one and only one low bit over the transmission line at an end of each synchronization signal. When the predetermined voltage levels for the high bit, low bit and synchronization signals are different from each other, the method is impl...

The invention proposes a synchronization method and apparatus, wherein based on a measuring time (110, 210) and the value of at least one quantity of the at least one sensor object, the at least one sensor object is determined at at least one of the base times (t.sub.k-1, t.sub.k, t.sub.k+1).

An apparatus with ultra wide band (UWB) applications such as radar, position tracking and communications, for example Ground Penetrating Radar (GPR) and Wireless Personal Area Networking (WPANs). An apparatus synchronises a receiver to a received UWB signal having a known hopping code. The apparatus determines a parameter of the signal in a number of time slots; adds the parameter associated with each time slot to a number of corresponding of time and code offset accumulators; and determines the...