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Peer Reviewed
See detailOpportunistic Beamforming and Scheduling for OFDMA Systems
Svedman, Patrick; Wilson, Sarah Kate; Cimini, Leonard J. et al

in IEEE Transactions on Communications (2007), 55(5), 941952

Detailed reference viewed: 126 (0 UL)
Peer Reviewed
See detailCorrelation properties of large scale fading based on Indoor measurements
Jaldén, Niklas; Hong, Aihua; Zetterberg, Per et al

in IEEE Wireless Communications and Networking Conference (2007)

Statistical channel models are attractive for their simplicity but sometimes lack in precision. In to improve modelling accuracy, statistical model parameters, which are dependent on the environment, are ... [more ▼]

Statistical channel models are attractive for their simplicity but sometimes lack in precision. In to improve modelling accuracy, statistical model parameters, which are dependent on the environment, are extended to include spatial and temporal correlation. In outdoor scenarios these parameters are assumed constant over large areas of several wavelengths hence the name large scale parameters. This paper studies the large scale fading (LSF) and the applicability of bringing this previously used outdoor variable to the indoor case. The impacts of the model of the LSF on the outdoor system-performance have been studied and several relevant models have been proposed for outdoor cases. We present the intra-site autocorrelation as well as the inter-site cross correlation of the LSF for an indoor channel. The results are based on two separate measurement campaigns conducted at KTH, Stockholm and TUI, Ilmenau, using a single mobile station (MS) and multiple base stations (BSs) to investigate such models. We observe that the areas under which the LSF could be assumed constant are, in indoor scenarios, so small that it can be assumed independent from one local area to another. Furthermore, we find results that point towards the existence of inter-site correlation in some specific scenarios. [less ▲]

Detailed reference viewed: 52 (3 UL)
Peer Reviewed
See detailJoint Estimation of Mutual Coupling, Element Factor, and Phase Center in Antenna Arrays
Mowlér, Marc; Larsson, Erik G.; Lindmark, Björn et al

in EURASIP Journal on Wireless Communications and Networking (2007), 2007

Detailed reference viewed: 25 (3 UL)
Peer Reviewed
See detailFull Diversity Detection in MIMO Systems with a Fixed-Complexity Sphere Decoder
Jaldén, Joakim; Barbero, Luis G.; Ottersten, Björn UL et al

in Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (2007)

Detailed reference viewed: 28 (0 UL)
Peer Reviewed
See detailOn Downlink Beamforming with Indefinite Shaping Constraints
Hammarwall, David; Bengtsson, Mats; Ottersten, Björn UL

in IEEE Transactions on Signal Processing (2006), 54(9), 35663580

Detailed reference viewed: 39 (0 UL)
Peer Reviewed
See detailSystem Evaluation of Optimal Downlink Beamforming with Congestion Control in Wireless Communication
Stridh, Rickard; Bengtsson, Mats; Ottersten, Björn UL

in IEEE Transactions on Wireless Communications (2006), 5(4), 743751

Detailed reference viewed: 18 (0 UL)
Peer Reviewed
See detailRealization of a Spatially Multiplexed MIMO System
Samuelsson, David; Jaldén, Joakim; Zetterberg, Per et al

in EURASIP Journal on Applied Signal Processing (2006), 2006

Detailed reference viewed: 26 (0 UL)
Peer Reviewed
See detailInterference Robustness Aspects of Space-Time Block Code-Based Transmit Diversity
Klang, Göran; Ottersten, Björn UL

in IEEE Transactions on Signal Processing (2005), 53(4), 12991309

Detailed reference viewed: 24 (0 UL)
Peer Reviewed
See detailOn the Complexity of Sphere Decoding in Digital Communications
Jaldén, Joakim; Ottersten, Björn UL

in IEEE Transactions on Signal Processing (2005), 53

Detailed reference viewed: 25 (0 UL)
Peer Reviewed
See detailArray Interpolation and DOA MSE Reduction
Hyberg, Per; Jansson, Magnus; Ottersten, Björn UL

in IEEE Transactions on Signal Processing (2005), 53(12), 44644471

Detailed reference viewed: 42 (0 UL)
Peer Reviewed
See detailMinimum BER Linear Transceivers for MIMO Channels via Primal Decomposition
Palomar, Daniel Pèrez; Bengtsson, Mats; Ottersten, Björn UL

in IEEE Transactions on Signal Processing (2005), 53(8), 28662882

Detailed reference viewed: 17 (0 UL)
Peer Reviewed
See detailMIMO Channel Capacity and Modeling Issues on a Measured Indoor Radio Channel at 5.8 GHz
Stridh, Rickard; Yu, Kai; Ottersten, Björn UL et al

in IEEE Transactions on Wireless Communications (2005), 4(3), 895903

Detailed reference viewed: 42 (0 UL)
Peer Reviewed
See detailWhen will smart antennas be ready for the market? Part II - results
Kaiser, T.; Bourdoux, A.; Choi, S. et al

in IEEE Signal Processing Magazine (2005), 22(6), 174176

Detailed reference viewed: 19 (0 UL)
Peer Reviewed
See detailWhen will smart antennas be ready for the market? Part I
Kaiser, T.; Bourdoux, A.; Choi, S. et al

in EURASIP Journal on Wireless Communications and Networking (2005), 22(2), 87-92

Detailed reference viewed: 37 (1 UL)
Peer Reviewed
See detailAsymptotic Eigenvalue Distributions and Capacity for MIMO Channels under Correlated Fading
Martin, Cristoff; Ottersten, Björn UL

in IEEE Transactions on Wireless Communications (2004), 3(4), 13501359

Detailed reference viewed: 25 (0 UL)
Peer Reviewed
See detailArray Interpolation and Bias Reduction
Hyberg, Per; Jansson, Magnus; Ottersten, Björn UL

in IEEE Transactions on Signal Processing (2004), 52(10), 27112720

Detailed reference viewed: 34 (0 UL)
Peer Reviewed
See detailDesign of channel estimate dependent space-time block codes
Jöngren, George; Skoglund, Mikael; Ottersten, Björn UL

in IEEE Transactions on Communications (2004), 52(7), 11911203

Detailed reference viewed: 35 (0 UL)
Peer Reviewed
See detailA QoS-aware Proportional Fair Scheduler for Opportunistic OFDM
Svedman, Patrick; Wilson, Sarah Kate; Ottersten, Björn UL

in Proceedings IEEE Vehicular Technology Conference, Fall (2004)

Detailed reference viewed: 32 (1 UL)
Peer Reviewed
See detailModeling of Wideband MIMO Radio Channels Based on NLOS Indoor Measurements
Yu, Kai; Bengtsson, Mats; Ottersten, Björn UL et al

in IEEE Transactions on Vehicular Technology (2004), 53(3), 655665

Detailed reference viewed: 23 (0 UL)
Peer Reviewed
See detailPower Allocation and Bit Loading for Spatial Multiplexing in MIMO Systems
Zhang, Xi; Ottersten, Björn UL

in Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (2003)

The power assignment problem is important for Multiple-Input-Multiple-Output (MIMO) systems to achieve high capacity. Although this problem is solved by well-known water filling algorithms, this does not ... [more ▼]

The power assignment problem is important for Multiple-Input-Multiple-Output (MIMO) systems to achieve high capacity. Although this problem is solved by well-known water filling algorithms, this does not provide an optimal solution if the system is constrained to a fixed raw bit error rate threshold and to discrete modulation s. In this work an approximate approach, called QoS based WF, is proposed to solve the power assignment problem with such constrains. It is shown to outperform quantization of the conventional water filling solution and a well known bit loading algorithm (Chow's algorithm) used in the Digital Subscriber Lines (DSL). [less ▲]

Detailed reference viewed: 25 (0 UL)