Search Results - "Zetterberg, P."

The spectrum efficiency of a base station antenna array system for spatially selective transmission by Zetterberg, P., Ottersten, B.

“…In this paper we investigate the spectrum efficiency gain using transmitting antenna arrays at the base stations of a mobile cellular network. The proposed…”
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Fennoscandian summers from AD 500 : temperature changes on short and long timescales by BRIFFA, K. R, JONES, P. D, BARTHOLIN, T. S, ECKSTEIN, D, SCHWEINGRUBER, F. H, KARLEN, W, ZETTERBERG, P, ERONEN, M

“…Quantitative estimates of 1480 years of summer temperatures in northern Fennoscandia have previously been derived from continuous treering records from…”
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A 1,400-year tree-ring record of summer temperatures in Fennoscandia by Briffa, K. R, Bartholin, T. S, Eckstein, D, Jones, P. D, Karlén, W, Schweingruber, F. H, Zetterberg, P

“…Maximum latewood density and raw mean ring width data have been determined for living and remnant Scots pines in Sweden, dating back to AD 443. Qualitative…”
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A comparison of two systems for downlink communication with base station antenna arrays by Zetterberg, P.

“…We compare the performance of the downlink of two systems with antenna arrays at the base stations. One system uses a third of the available spectrum per cell…”
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Capacity Limits and Multiplexing Gains of MIMO Channels with Transceiver Impairments by Bjornson, E., Zetterberg, P., Bengtsson, M., Ottersten, B.

“…The capacity of ideal MIMO channels has a high-SNR slope that equals the minimum of the number of transmit and receive antennas. This letter analyzes if this…”
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Approximate Maximum Likelihood Estimation of Rician K-Factor and Investigation of Urban Wireless Measurements by Medawar, S., Handel, P., Zetterberg, P.

“…We consider the problem of estimating the K-factor of a Rician fading wireless channel based on observations of the envelope only, i.e., without…”
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System comparison of smart and dumb antennas by Bengtsson, M., Svedman, P., Xi Zhang, Zetterberg, P.

“…Different approaches have been proposed to utilize multiple antennas at both transmitters and receivers of wireless systems. Herein, we provide a system…”
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The Downside of Gender Quotas? Institutional Constraints on Women in Mexican State Legislatures by Zetterberg, Par

“…In recent years, a rich and varied body of literature has developed that focuses on the way that institutional structures limit women's substantive…”
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WiFi fingerprint indoor positioning system using probability distribution comparison by Le Dortz, N., Gain, F., Zetterberg, P.

“…Positioning services are increasingly used for applications such as navigation, advertising and social media. While outdoor navigation based on GPS and/or…”
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Receiver I/Q Imbalance: Tone Test, Sensitivity Analysis, and the Universal Software Radio Peripheral by Handel, P., Zetterberg, P.

“…The problem of determining the gain imbalance, quadrature skew, and local oscillator leakage of contemporary radio frequency receivers by tone test is…”
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Cost drivers and deployment scenarios for future broadband wireless networks - key research problems and directions for research by Giles, T., Markendahl, J., Zander, J., Zetterberg, P., Karlsson, P., Malmgren, G., Nilsson, J.

“…The most prominent problem in providing anywhere, anytime wideband mobile access is the towering infrastructure cost as it is basically proportional to the…”
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Performance of multiple-receive multiple-transmit beamforming in WLAN-type systems under power or EIRP constraints with delayed channel estimates by Zetterberg, P., Bengtsson, M., McNamara, D., Karlsson, P., Beach, M.A.

“…Downlink beamforming in a WLAN-type system employing access points and mobiles equipped with multiple antennas and associated receivers and transmitters are…”
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A spectroscopic study of S III by Johansson, L, Magnusson, C E, Joelsson, I, Zetterberg, P O

“…This paper presents a list of some 240 lines from laboratory data identified as S III transitions, 12 percent of which are intercombination lines. About 60…”
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Performance of narrow-beams in an suburban environment by Zetterberg, P.

“…Based on measurement results, an analysis of antenna gain and side-lobe levels in a realistic propagation environment is performed. In particular, emphasis is…”
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Downlink beamforming with delayed channel estimates under total power, element power and equivalent isotropic radiated power (EIRP) constraints by Zetterberg, P., Bengtsson, M., McNamara, D., Karlsson, P., Beach, M.A.

“…A WLAN-type scenario where a base-station (access point) equipped with multiple antennas is transmitting and a mobile with only a single antenna is receiving,…”
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Transceiver Inphase/Quadrature Imbalance, Ellipse Fitting, and the Universal Software Radio Peripheral by Rojas, C. R., Zetterberg, P., Handel, P.

“…In this paper, we introduce a method for inphase/quadrature imbalance parameter estimation based on ellipse fitting. The performance of the method is…”
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Evidence on climatic variability and prehistoric human activities between 165 B.C. and A.D. 1400 derived from subfossil Scots pines (Pinus sylvestris L.) found in a lake in Utsjoki, northernmost Finland by Zetterberg, P., Eronen, M., Briffa, K.R.

“…Samples from 1265 subfossil pines have been collected from small lakes and peat deposits in the forest-limit zone of northern Fennoscandia in order to study…”
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The supra-long Scots pine tree-ring record for Finnish Lapland: Part 1, chronology construction and initial inferences by Eronen, Matti, Zetterberg, Pentti, Briffa, Keith R., Lindholm, Markus, Meriläinen, Jouko, Timonen, Mauri

“…This paper reviews the development of the current ‘supra-long’ pine chronology for northern Finnish Lapland. In the forest-tundra ecotone region of northern…”
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A Preliminary Study on Waveform Candidates for 5G Mobile Radio Communications above 6 GHz by Zaidi, Ali A., Jian Luo, Gerzaguet, Robin, Wolfgang, Andreas, Weiler, Richard J., Vihriäla, Jaakko, Svensson, Tommy, Yinan Qi, Halbauer, Hardy, Zhao Zhao, Zetterberg, Per, Honglei Miao

“…This paper provides an overview and preliminary comparison of several multi-carrier and single-carrier waveforms that are potential candidates for future 5G…”
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Cost reference particle filter in data aided channel estimation and phase noise tracking for OFDM systems by Negusse, S., Zetterberg, P.

“…In this paper, we present a robust technique based on cost reference particle filter (CRPF) for combined channel impulse response (CIR) estimation and phase…”
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