1
Schuh Ralf, Sommer Magnus: Adaptive passive distributed antenna system. Telia, Schuh Ralf, Sommer Magnus, SVENSSON Peder, June 17, 2004: WO/2004/051804 (132 worldwide citation)

A distributed antenna system including at least one base station (2, 3), at least one transmission line (1), for transmission of signals, connected with the base station (2, 3) and at least two antennas (6, 8, 10). Each antenna (6, 8, 10) and the transmission line (1) are connected via a control dev ...


2
Bo Olsson: Method for locating mobile stations in a digital telephone network. Telia, Oblon Spivak McClelland Maier & Neustadt P C, October 8, 1996: US05564079 (129 worldwide citation)

The invention relates to a method for locating mobile stations in a digital telecommunication network, especially the GSM network. According to the invention, reference measurements are carried out on relevant traffic routes with the aid of a measuring mobile in order to provide position information ...


3
Bo Engstrom, Roger Larsson, Mattias Wahlqvist, Christer Ostberg: Random access orthogonal frequency division multiplex system and method. Telia, Oblon Spivak McClelland Maier & Neustadt P C, June 1, 1999: US05909436 (120 worldwide citation)

A random access protocol system and method for communicating between a mobile station and a base station in a multi-access digital radio communication system, including the steps of cyclically repeating a random access sequence and transmitting each cyclically repeated random access sequence in an o ...


4
Bo Engstrom, Roger Larsson: Arrangement in a multi-user system. Telia, Oblon Spivak McClelland Maier & Neustadt P C, July 21, 1998: US05784363 (118 worldwide citation)

A multi-user system includes radio channels which are independent and uncorrelated for different users. The system operates with frequencies which, due to multi-path propagation, are more or less attenuated for one user and more or less amplified for another user. Elements are arranged to detect or ...


5
Mikael Isaksson, Bo Engstrom: Method and apparatus for synchronization in digital transmisison systems of the OFDM type. Telia, Oblon Spivak McClelland Maier & Neustadt P C, July 29, 1997: US05652772 (108 worldwide citation)

The invention relates to a method and apparatus for synchronization of transmitters and receivers in digital transmission systems of the OFDM type. The system uses FFT technique to carry out the modulation and demodulation procedures. According to the invention, the transmitter sends synchronization ...


6
Mikael Isaksson: Method and arrangement for synchronization in OFDM modulation. Telia, Oblon Spivak McClelland Maier & Neustadt P C, March 10, 1998: US05726973 (95 worldwide citation)

A method and an arrangement for synchronization in OFDM modulation. Frequency errors of an IF clock and a sampling clock are controlled by estimating the deviation of the sampling clock and, respectively, the IF clock for two subcarriers with different frequencies. According to the invention, the fr ...


7
Isaksson Mikael, Engstroem Bo: Frequency and frame synchronisation for ofdm. Telia, September 4, 1996: EP0730357-A2 (91 worldwide citation)

The present invention is a method and device for synchronization at OFDM-systems. A signal is read into the synchronization block in the time domain, i.e. before fourier transforming of the signal via the FFT-processor, according to Figure 1. In the synchronization block the frame clock for start an ...


8
Mikael Isaksson, Bo Engstroem: Method and device for synchronization at OFDM-system. Telia, Oblon Spivak McClelland Maier & Neustadt P C, September 22, 1998: US05812523 (88 worldwide citation)

A method of demultiplexing OFDM signals and a receiver for such signals. More particularly the method is concerned with synchronization in an OFDM receiver. A signal is read into a synchronization unit, in the time domain, i.e., before fourier transforming the signal by means of an FFT processor. In ...


9
Ragnar K ang hre: Method and arrangement for dynamic allocation of multiple carrier-wave channels for multiple access by frequency division of multiplexing. Telia, Oblon Spivak McClelland Maier & Neustadt P C, October 21, 1997: US05680388 (84 worldwide citation)

The invention relates to a method and an arrangement for dynamic allocation of multiple carrier wave channels for multiple access by frequency division multiplexing. the invention provides a number of mobile units with the possibility of flexible data speed and continuous transmission. On the fixed ...


10
Ayoub Souhad: Procedure and device for allocation of radio resources. Telia, SVENSSON Peder, December 7, 2000: WO/2000/074428 (82 worldwide citation)

The present invention relates to a procedure and a device for allocation of radio resources in form of time slots in a cellular radio system, which allocation is performed in order to, in the cells of the system, meet the request/demand by mobile stations for bandwidth in form of one or more consecu ...