| | |
|---|
| 2009 | Capacity measurements in a cooperative MIMO network
Jungnickel, V.; Jäckel, S.; Thiele, L.; Lei, J.; Kruger, U.; Brylka, A.; Helmolt, C. von | Journal Article |
| 2008 | Flexible demonstrator platform for cooperative joint transmission and detection in next generation wireless MIMO-OFDM networks
Ibing, A.; Kühling, D.; Kuszak, M.; Helmolt, C. von; Jungnickel, V. | Conference Paper |
| 2007 | Dynamisches datenratenadaptives Signalverarbeitungsverfahren in einem drahtlosen Infarot-Datenübertragungssystem
Grubor, J.; Jungnickel, V.; Langer, K.-D.; Helmolt, C. von | Patent |
| 2007 | Mobile access techniques for data rates up to gigabit/s
Jungnickel, V.; Helmolt, C. von | Conference Paper |
| 2005 | 1 Gbit/s MIMO-OFDM transmission experiments
Jungnickel, V.; Forck, A.; Haustein, T.; Schiffermüller, S.; Helmolt, C. von; Luhn, F.; Pollock, M.; Juchems, C.; Lampe, M.; Zirwas, W.; Eichinger, J.; Schulz, E. | Conference Paper |
| 2005 | The algebraic structure of frequency-selective MIMO channels
Pohl, V.; Jungnickel, V.; Helmolt, C. von | Journal Article |
| 2005 | Continuous flat-fading MIMO channels
Pohl, V.; Nguyen, P.H.; Jungnickel, V.; Helmolt, C. von | Journal Article |
| 2005 | FUNKUEBERTRAGUNGSVERFAHREN IM INNENRAUMBEREICH ZUR PARALLELEN FUNKUEBERTRAGUNG VON DIGITALEN DATENTEILSTROEMEN UND MOBILES FUNKUEBERTRAGUNGSSYSTEM
Jungnickel, V.; Krueger, U.; Pohl, V.; Helmolt, C. von; Haustein, T.; Stanczak, S. | Patent |
| 2005 | On the value of spatial diversity for the synchronisation in MIMO-OFDM systems
Schellmann, M.; Jungnickel, V.; Helmolt, C. von | Conference Paper |
| 2004 | Implementation of adaptive channel inversion in a real-time MIMO transmission system
Haustein, T.; Forck, A.; Gäbler, H.; Helmolt, C. von; Jungnickel, V.; Krüger, U. | Conference Paper |
| 2004 | Implementation of channel aware scheduling and bit-loading for the multiuser SIMO MAC in a real-time MIMO demonstration test-bed at high data rate
Haustein, T.; Zhou, C.; Forck, A.; Gäbler, H.; Helmolt, C. von; Jungnickel, V.; Krüger, U. | Conference Paper |
| 2004 | A MIMO system with reciprocal transceivers for the time-division duplex mode
Jungnickel, V.; Krüger, U.; Istoc, G.; Haustein, T.; Helmolt, C. von | Conference Paper |
| 2004 | A multi-code space-frequency RAKE receiver
Chen, H.; Jungnickel, V.; Pohl, V.; Helmolt, C. von | Conference Paper |
| 2004 | Optimal length of the training and data phase in continuous flat fading MIMO channels
Pohl, V.; Jungnickel, V.; Helmolt, C. von | Conference Paper |
| 2004 | Real-time concepts for MIMO-OFDM
Jungnickel, V.; Haustein, T.; Forck, A.; Schiffermueller, S.; Gäbler, H.; Helmolt, C. von; Zirwas, W.; Eichinger, J.; Schulz, E. | Conference Paper |
| 2004 | Real-time MIMO transmission with adaptive bitloading
Haustein, T.; Forck, A.; Gäbler, H.; Helmolt, C. von; Jungnickel, V.; Krüger, U. | Conference Paper |
| 2003 | Capacity of MIMO systems with closely spaced antennas
Jungnickel, V.; Pohl, V.; Helmolt, C. von | Journal Article |
| 2003 | The effect of path loss variations on the capacity of MIMO systems
Pohl, V.; Jungnickel, V.; Haustein, T.; Helmolt, C. von | Conference Paper |
| 2003 | Electronic tracking for wireless infrared communications
Jungnickel, V.; Forck, A.; Haustein, T.; Krüger, U.; Pohl, V.; Helmolt, C. von | Journal Article |
| 2003 | Experiments on the element spacing in multi-antenna systems
Jungnickel, V.; Pohl, V.; Helmolt, C. von | Conference Paper |
| 2003 | How often channel estimation is needed in MIMO systems
Pohl, V.; Nguyen, P.H.; Jungnickel, V.; Helmolt, C. von | Conference Paper |
| 2003 | Limits of the achievable symbol rate in flat fading MIMO systems
Pohl, V.; Nguyen, P.H.; Jungnickel, V.; Helmolt, C. von | Conference Paper |
| 2003 | Link adaptation in a multi-antenna system
Jungnickel, V.; Haustein, T.; Pohl, V.; Helmolt, C. von | Conference Paper |
| 2002 | Antenna spacing in MIMO indoor channels
Pohl, V.; Jungnickel, V.; Haustein, T.; Helmolt, C. von | Conference Paper |
| 2002 | On linear pre-processing in multi-antenna systems
Jungnickel, V.; Haustein, T.; Jorswieck, E.; Helmolt, C. von | Conference Paper |
| 2002 | On the performance of signal detection algorithms in flat-fading and frequency-selective MIMO channels
Jorswieck, E.; Jungnickel, V.; Haustein, T.; Pohl, V.; Helmolt, C. von | Conference Paper |
| 2002 | Performance of MIMO systems with channel inversion
Haustein, T.; Helmolt, C. von; Jorswieck, E.; Jungnickel, V.; Pohl, V. | Conference Paper |
| 2002 | A physical model of the wireless infrared communication channel
Jungnickel, V.; Pohl, V.; Nonnig, S.; Helmolt, C. von | Journal Article |
| 2002 | Zero forcing equalizing filter for MIMO channels with intersymbol interference
Pohl, V.; Jungnickel, V.; Jorswieck, E.; Helmolt, C. von | Conference Paper |
| 2001 | 155 Mbit/s wireless transmission with imaging infrared receiver
Jungnickel, V.; Haustein, T.; Forck, A.; Helmolt, C. von | Journal Article |
| 2001 | Bit error rates for a MIMO system in Rayleigh and Rician channels
Haustein, T.; Jorswieck, E.; Jungnickel, V.; Krueger, U.; Pohl, V.; Helmolt, C. von | Conference Paper |
| 2001 | A MIMO WLAN based on linear channel inversion
Jungnickel, V.; Haustein, T.; Jorswieck, E.; Helmolt, C. von | Conference Paper |
| 2001 | Performance of a MIMO system with overlay pilots
Jungnickel, V.; Haustein, T.; Jorswieck, E.; Pohl, V.; Helmolt, C. von | Conference Paper |
| 2001 | A power and bandwidth efficient modulation for diffuse wireless infrared communication
Kruger, U.; Helmolt, C. von; Jungnickel, V.; Haustein, T. | Journal Article |
| 2001 | A radio system with multi-element antennas
Pohl, V.; Kruger, U.; Helmolt, C. von; Haustein, T.; Stanczak, S. | Conference Paper |
| 2000 | A channel model for wireless infrared communication
Pohl, V.; Jungnickel, V.; Helmolt, C. von | Conference Paper |
| 2000 | Integrating-sphere diffuser for wireless infrared communication
Pohl, V.; Jungnickel, V.; Helmolt, C. von | Journal Article |
| 1999 | Fast word synchronisation for digital pulse-position modulation
Jungnickel, V.; Can, A.; Helmolt, C. von | Journal Article |
| 1999 | Integrating sphere diffuser for wireless infrared communication
Pohl, V.; Jungnickel, V.; Hentges, R.; Helmolt, C. von | Conference Paper |
| 1999 | OPTISCHER FREQUENZGENERATOR
Helmolt, C. von; Krueger, U. | Patent |
| 1998 | Broadband wireless infrared LAN architecture compatible with Ethernet protocol
Jungnickel, V.; Helmolt, C. von; Kruger, U. | Journal Article |
| 1998 | Optical microwave generation and transmission experiments in the 12- and 60-GHz region for wireless communications
Braun, R.-P.; Grosskopf, G.; Heidrich, H.; Helmolt, C. von; Kaiser, R.; Kruger, K.; Kruger, U.; Rohde, D.; Schmidt, F.; Stenzel, R.; Trommer, D. | Journal Article |
| 1997 | Comparison of the cascadability performance of different types of commercially available wavelength (de)multiplexers
Caspar, C.; Foisel, H.-M.; Helmolt, C. von; Strebel, B.; Sugaya, Y. | Conference Paper |
| 1997 | Microwave fiber-optic downconverter
Helmolt, C. von; Kruger, U.; Kruger, K. | Conference Paper |
| 1997 | Quasicontinuous tunable fiber-ring laser applied as local oscillator in an absolute calibrated spectrometer for WDM systems
Kruger, U.; Kruger, K.; Helmolt, C. von | Journal Article |
| 1996 | 58 GHz fibre optic upconverter
Helmolt, C. von; Kruger, U.; Kruger, K.; Kuller, L. | Journal Article |
| 1996 | Absorption spectra of excited Kr 84 states between 1.5 and 1.58 mu m and their use for absolute frequency locking
Fischer, U.H.P.; Helmolt, C. von | Journal Article |
| 1996 | Decentralized frequency stabilization scheme for a dense OFDM system involving simple filters and an absolute reference
Kruger, U.; Kruger, K.; Helmolt, C. von; Pawlowski, E.; Depovere, G.F.G.; Witlox, R.G.J.J.; Gils, R.A.J.C.M. van | Journal Article |
| 1996 | Optical microwave generation and transmission experiments in the 12 and 60 GHz-region for wireless communications
Braun, R.P.; Grosskopf, G.; Helmolt, C. von; Kruger, K.; Kruger, U.; Rohde, D.; Schmidt, F. | Conference Paper |
| 1996 | Special tunable fiber-ring laser, applied as local oscillator in an absolute calibrated spectrometer for WDM systems
Kruger, U.; Kruger, K.; Helmolt, C. von | Conference Paper |
| 1995 | Long-term frequency stability of three absolutely referenced lasers at 1547.8 nm located at different places which were separated by 30 Km
Fischer, U.H.P.; Gladisch, A.; Giehmann, L.; Helmolt, C. von; Rocks, M. | Conference Paper |
| 1995 | Saturation and isotopic shift of the Kr 84 excited-state transition at 1547.825 nm
Fischer, U.H.P.; Helmolt, C. von | Journal Article |
| 1994 | Engineered automatic control and frequency stabilization unit for a coherent multichannel (CMC) system
Fischer, U.H.P.; Helmolt, C. von; Kruger, K.; Kruger, U. | Journal Article |
| 1994 | Engineered, rack-mounted, optical reference unit at 1547.825 nm
Fischer, U.H.P.; Helmolt, C. von | Journal Article |
| 1994 | Scanning heterodyne spectrometer with different local oscillator laser types
Fischer, U.H.P.; Helmolt, C. von | Journal Article |
| 1994 | Wavelength manager covering the EDFA-band and capable of controlling hundreds of transmitters
Kruger, U.; Kruger, K.; Batchellor, C.R.; Fischer, U.; Helmolt, C. von; Nagengast, U. | Conference Paper |
| 1993 | Optical frequency multiplex technique: principles, applications, and potential
Bachus, E.-J.; Grosskopf, G.; Heidrich, H.; Helmolt, C. von; Meissner, P.; Patzak, E.; Saniter, J.; Strebel, B.; Walf, G.; Weber, H.-G. | Journal Article |
| 1993 | Polarisation insensitive frequency conversion of a 10-channel OFDM signal over 275 GHz in a semiconductor laser amplifier
Schnabel, R.; Hilbk, U.; Hermes, T.; Meissner, P.; Helmolt, C. von; Magari, K.; Raub, F.; Pieper, W.; Westphal, F.J.; Ludwig, R.; Kuller, L.; Weber, H.G. | Conference Paper |
| 1992 | Absolute CMC frequency stabilisation with 0.8 THz control range and OEIC front-end module
Fischer, U.H.P.; Helmolt, C. von; Kruger, K.; Kruger, U. | Journal Article |
| 1991 | Engineered automatic control and frequency stabilization unit for the RACE project R 1010: Coherent multichannel (CMC) system demonstrator
Fischer, U.H.P.; Helmolt, C. von; Kruger, K.; Kruger, U. | Conference Paper |
| 1989 | Reflection suppression by orthogonal modes
Helmolt, C. von | Journal Article |
| 1987 | Efficiency of guided wave acoustooptic interaction for selected cuts in LiNbO3
Helmolt, C. von; Schaffer, C.H. | Journal Article |
| 1987 | Integrated optic strip waveguide phase modulator driven by a SAW
Helmolt, C. von | Journal Article |
| 1987 | Polarisation transformer on Ti:LiNbO3 with reset-free optical operation for heterodyne/homodyne receivers
Heidrich, H.; Helmolt, C. von; Hoffmann, D.; Hensel, H.-J.; Kleinwachter, A. | Journal Article |
| 1987 | Stable operation of a laser diode directly coupled to a LiNbO3 chip using optical isolation by orthogonal polarization
Helmolt, C. von; Heidrich, H.; Schunk, N. | Journal Article |
| 1986 | Broadband single-mode Te/TM convertors in LiNBO3: a novel design
Helmolt, C. von | Journal Article |