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Galda
Dirk Galda, Hamburg DE
| Patent application number | Description | Published |
|---|---|---|
| 20100215079 | Method and communication system device for the generation or processing of OFDM symbols in a transmission system with spread user data - OFDM symbols are generated using data from one or more users or from one or more data sources represented on a number of sub-carriers. To inhibit multiple-access interference on application of the CDMA principle, the data are transformed in a data-source specific manner and only subsequently allocated to the sub-carriers, independently of the transformation. | 08-26-2010 |
Dirk Galda, Haar DE
| Patent application number | Description | Published |
|---|---|---|
| 20100118993 | METHOD AND DEVICE FOR DETERMINING AN UNABBREVIATED CHANNEL-IMPULSE RESPONSE IN AN OFDM TRANSMISSION SYSTEM - A method and a device for determining an unabbreviated channel-impulse response in an OFDM transmission system, of which the duration is greater than the length of the guard interval, estimates the channel-transmission factor at frequency-time positions of a relatively-coarse frequency-time raster, interpolates the channel-transmission factor at frequency-time positions of a relatively-fine frequency-time raster and calculates the unabbreviated channel-impulse response by means of inverse Fourier transform from the estimated or interpolated values of the channel-transmission factor at the frequency-time positions of the relatively-fine frequency-time raster. In this context, estimated values of the channel-transmission factor optimized at the individual frequency-time positions of the relatively-fine frequency-time raster are determined from received symbols and from transmitted symbols estimated by means of decision from the received symbols. | 05-13-2010 |
Dirk Galda, Haar-Gronsdorf DE
| Patent application number | Description | Published |
|---|---|---|
| 20090279531 | Method for synchronizing radio communication system divided into radio cells - Data is transmitted via time division multiple access methods and every radio cell includes one base station each for the radio coverage of a plurality of mobile stations assigned to the radio cell. The base station receives, in addition to mobile station signals of its own radio cell, mobile station signals of neighboring radio cells and determines, on the basis of the mobile station signals received, a time synchronization value and/or a frequency synchronization value to which the base station synchronizes itself. | 11-12-2009 |