Dhananjay Ashok Gore
Qualcomm
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Publication
Featured researches published by Dhananjay Ashok Gore.
Proceedings of the IEEE | 2004
Arogyaswami Paulraj; Dhananjay Ashok Gore; Rohit U. Nabar; Helmut Bölcskei
High data rate wireless communications, nearing 1 Gb/s transmission rates, is of interest in emerging wireless local area networks and home audio/visual networks. Designing very high speed wireless links that offer good quality-of-service and range capability in non-line-of-sight (NLOS) environments constitutes a significant research and engineering challenge. Ignoring fading in NLOS environments, we can, in principle, meet the 1 Gb/s data rate requirement with a single-transmit single-receive antenna wireless system if the product of bandwidth (measured in hertz) and spectral efficiency (measured in bits per second per hertz) is equal to 10/sup 9/. A variety of cost, technology and regulatory constraints make such a brute force solution unattractive, if not impossible. The use of multiple antennas at transmitter and receiver, popularly known as multiple-input multiple-output (MIMO) wireless, is an emerging cost-effective technology that offers substantial leverages in making 1 Gb/s wireless links a reality. The paper provides an overview of MIMO wireless technology covering channel models, performance limits, coding, and transceiver design.
asilomar conference on signals, systems and computers | 2000
David Gesbert; Helmut Bölcskei; Dhananjay Ashok Gore; Arogyaswami Paulraj
Using a multiple-input multiple-output (MIMO) outdoor wireless fading channel model previously introduced by the authors, we study the impact of physical propagation parameters in a full scattering scenario on outage capacity and ergodic capacity. In particular, introducing the concept of scatterer-to-scatterer (STS) rank, we show that a MIMO channel with correlated inputs (or outputs) but with full STS rank yields better performance from an outage capacity point-of-view than a channel with i.i.d. inputs and outputs and low STS rank.
vehicular technology conference | 2008
Harris Teague; Chirag Sureshbhai Patel; Dhananjay Ashok Gore; Hemanth Sampath; Ayman Fawzy Naguib; Tamer Kadous; Alexei Gorokhov; Avneesh Agrawal
The paper presents MIMO field performance results observed using a ultra mobile broadband (UMB) testbed network. We evaluate metrics such as antenna correlations and channel condition number to characterize the MIMO channel. Results show that low condition numbers, which are beneficial to MIMO, are prevalent for a majority of the coverage area in our network. We demonstrate that the use of MIMO provides gains of the order of 20-40% over SIMO transmissions. These gains are made possible by the use of cross-polarized transmit antennas and advanced UMB features that allow dynamic MIMO vs. SIMO transmission selection based on channel conditions. These results are obtained in a truly mobile, wireless wide-area deployment, which makes them unique. Our results point to the viability and value of MIMO in future mobile wireless networks.
Archive | 2005
Alexei Gorokhov; Ayman Fawzy Naguib; Arak Sutivong; Dhananjay Ashok Gore; Tingfang Ji
Archive | 2006
Ji Tingfang; Ayman Fawzy Naguib; Arak Sutivong; Dhananjay Ashok Gore; Alexei Gorokhov
Archive | 2006
Alexei Gorokhov; Dhananjay Ashok Gore; Gwendolyn Denise Barriac; Tamer Kadous
Archive | 2005
Dhananjay Ashok Gore; Alexei Gorokhov; Ji Tingfang; Aamod Khandekar; Tamer Kadous
Archive | 2005
Tamer Kadous; Aamod Khadekar; Dhananjay Ashok Gore; Alexei Gorokhov
Archive | 2004
Dhananjay Ashok Gore; Avneesh Agrawal; Tamer Kadous
Archive | 2005
Dhananjay Ashok Gore; Alexei Gorokhov; Hemanth Sampath; Tingfang Ji; Tamer Kadous