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Dive into the research topics where P Karlsson is active.

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Featured researches published by P Karlsson.


symposium on communications and vehicular technology in the benelux | 2000

Initial investigation of multiple-input multiple-output (MIMO) channels in indoor environments

Darren McNamara; Mark A Beach; Pn Fletcher; P Karlsson

Theoretical investigation of multiple-input multiple-output (MIMO) channels has shown the potentially huge increases in spectral efficiency that this architecture can offer. The performance of such MIMO systems is dependent on the propagation environment exhibiting sufficient multipath scattering. This paper presents some initial analysis of MIMO channel measurements taken in indoor environments at 5.2 GHz. Outage capacities are calculated and compared between different locations and for different antenna array configurations. Surprisingly, it is shown that the highest channel capacities were actually calculated from data measured in an empty room.


vehicular technology conference | 2001

Throughput performance of WLANs operating at 5 GHz based on link simulations with real and statistical channels

Angela Doufexi; Simon Armour; P Karlsson; Andrew R. Nix; David R. Bull

At present, wireless local area networks (WLANs) supporting broadband multimedia communication are being developed and standardized in the 5 GHz band. Two such standards are HIPERLAN/2, defined by ETSI BRAN, and the IEEE 802.11a. This paper presents the throughput performances of the two standards based on link simulations with real and statistical channels. Physical layer performance results are presented for real channel measurements and the impact of sectorised antennas at the access point is given for HIPERLAN/2.


Electronics Letters | 2000

Capacity variation of indoor multiple-input multiple-output channels

Darren McNamara; Mark A Beach; Pn Fletcher; P Karlsson


Antennas and Propagation, 2001. Eleventh International Conference on (IEE Conf. Publ. No. 480) | 2001

Temporal variation of multiple-input multiple-output (MIMO) channels in indoor environments

Darren McNamara; Mark A Beach; Pn Fletcher; P Karlsson


Antennas and Propagation, 2001. Eleventh International Conference on (IEE Conf. Publ. No. 480) | 2001

UMTS spatio-temporal propagation trial results

Ben Allen; Jl Webber; P Karlsson; Mark A Beach


Electronics Letters | 2000

Spatial decorrelation of frequency division duplex links

Mark A Beach; Ben Allen; P Karlsson


Electronics Letters | 2001

Performance of HIPERLAN/2 using sectorised antennas

Angela Doufexi; S. Armour; Andrew R. Nix; P Karlsson; David R. Bull


3G Mobile Communication Technologies, 2001. Second International Conference on (Conf. Publ. No. 477) | 2001

Simulated performance of the HIPERLAN/2 physical layer with real and statistical channels

Angela Doufexi; Michael R. G. Butler; Simon Armour; P Karlsson; Andrew R. Nix; D. Ball


Electronics Letters | 2001

On the Performance of HIPERLAN/2 Systems Using Sectorised Antennas

Angela Doufexi; Simon Armour; Andrew R. Nix; P Karlsson; David R. Bull


Archive | 2001

IEE 3G Conference 2001

Angela Doufexi; Simon M D Armour; Mrg Butler; P Karlsson; Andrew R. Nix; David R. Bull

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