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2011 National Conference on Communications (NCC)
Significant throughput gains can be achieved in a multi-user MIMO (MU-MIMO) wireless system by exploiting the combination of multi-user scheduling and multi-user diversity. Open-loop MU-MIMO (OL-MU-MIMO) is a codebook based precoding technique where precoders are fixed a priori at the base station (BS) in a known fashion and the user needs to feedback which precoding vector is to be chosen referred to as precoding vector index (PVI) or stream indicator. This scheme feedbacks the channel qualitydoi:10.1109/ncc.2011.5734749 fatcat:lso2bwhetfe3ljnzvuj5okt7za
more »... indicator (CQI) which is used by the BS for allocation of modulation and coding scheme (MCS) to the scheduled users. As the precoders used at all the base stations are known a priori, estimation of co-channel interference (CCI) is accurate and there is negligible mismatch between the CQI fed back by the user in present frame and SINR experienced by the user during next frame for low Doppler, resulting in stable CQI modeling. In this paper, an extensive study is made on OL-MU-MIMO and open loop single-user MIMO (OL-SU-MIMO), with an emphasis on how OL-MU-MIMO exploits multi-user diversity to achieve high spectral efficiencies. We also derive the SINR and CQI expressions for such MU-MIMO systems, and provide simulation results which indicate that OL-MU-MIMO outperforms OL-SU-MIMO only when there are large number of users in the system.
Different-complexity Multi-Cell Processing (MCP) schemes employing Distributed Signal-to-Interference-Leakageplus-Noise-Ratio (SILNR) precoding techniques are proposed, which require reduced back-haul data exchange in comparison to the conventional MCP structure. Our results demonstrate that the proposed structures are capable of increasing the achievable cell-edge throughput and offering different geographic rate profile distributions as well as meeting different delay requirements.doi:10.1109/wcnc.2011.5779343 dblp:conf/wcnc/ZhangGH11 fatcat:7hz2vkma7fc6hkqt2nlyyavc4a
Emerging wireless communication systems use MIMO-OFDM with adaptive modulation and Hybrid Automatic Repeat Request (HARQ) techniques to enables high bit rate and low packet error rate. In this work, a 3-Stage packet scheduling algorithm that is HARQ aware is proposed, which supports real time service with multi-level delay constraints and retransmission constraints in OFDM systems. For performance analysis, three Quality of Service (QoS) parameters namely packet loss rate, fairness, andfatcat:elbaqqzh4zbprjotsxgoz7ypnm
more »... ut are studied. Corresponding to these three metrics and depending upon the delay and retransmission constraints, a 3-Stage scheduling strategy is proposed. It is assumed that the packets are lost due to violation of the delay constraint and/or channel induced error, even after allowing the maximum number of retransmissions. Simulation result shows that this novel 3-Stage scheduler achieves a balance between the three QoS metrics, and could therefore be preferred over Modified Largest Weighted Delay First, Proportion Fair, and Max Rate schedulers, which can not simultaneously satisfy all the three QoS metrics.
As Jiddu Krishnamurthy put it, "there is in every one of us the rest of humanity". ... As Jiddu Krishnamurthy would say, anything that separates the self from the other (outside the self) is ill-founded. ... Giridhar ...doi:10.46623/tt/2005.2.1.ed fatcat:qjhv7hsx3vgdxhns22t7hvjrpa
Giridhar, and G. K. Viswanadh. "Watershed delineation and stream network analysis uisng gis." and 4 shows delineated watershed of both of the Aster and Landsat DEM data. ... The basin morphometric characteristics of the various basins have been studied by many scientists using conventional (Horton, 1945; Smith, 1950; Strahler, 1957) and remote sensing and GIS methods (Krishnamurthy ...doi:10.28991/cej-2015-00000007 fatcat:h47yls7upve2zgbvlghll2edhm
Hence improvement of mulberry leaf quality and quantity is essential (Chaudhary and Giridhar, 1987) . ... Better response could be attributed to better nutritive value of leaves resulting in better silkworm cocoon yield and quality (Vishwanth and Krishnamurthy, 1984; Sinha et al., 2006) . ...doi:10.29321/maj.2019.000224 fatcat:mv7ykpq2arayxl4bvt4hr5vkl4
Br and Phalaenopsis in MS medium supplemented with BA (Mohan & Krishnamurthy, 2002; Rey & Mroginski, 2006; Jha et al., 2009; Gow et al., 2010) . ... Ethylene biosynthesis Another factor affecting somatic embryogenesis is ethylene biosynthesis which has been reported to inhibit regeneration (Giridhar et al., 2004) , it has been reported that by blocking ...doi:10.5772/36345 fatcat:rfcqrhfswrbrzficrhrurrlp7m
African Journal of Biotechnology
., 2003) and Decalepis hamiltonii (Giridhar et al., 2005) . ...doi:10.5897/ajb2014.13852 fatcat:jnmceo5xrzefbjjzz7mzsbkrre
Perovskite and Piezoelectric Materials [Working Title]
Journal of Hazardous Materials. 2009;162:899-905  Gomathi Devi L, Krishnamurthy G. ... International Journal of Hydrogen Energy. 2014;39:13481-13485  Gomathi Devi L, Krishnamurthy G. ...doi:10.5772/intechopen.91680 fatcat:w7qqa2smdffxbbbp5ekkm555ba
Correlation between carbon-carbon bond length and the ease of retro Diels-Alder reaction 1369 Kothurkar N K see Yamuna R 75 Kottalanka R K see Panda T K 1463 Krishna Reddy J see Hari Padmasri A 387 Krishnamurthy ... calcium phosphate 649 Baishya A see Biswal H S 1781 see Nembenna S 1781 Bajpai A see Moorthy J N 1323 Bakardjieva S see Labhsetwar N 517 Balachandran C see Perumal P T 177 Balaji S S see Giridhar ...doi:10.1007/s12039-015-0766-5 fatcat:fvwhltszuned7jlkrb4t7kquci
Dandona R, Dandona L, Srinivas M, Giridhar P, McCarty CA, Rao GN. Population-based assessment of refractive error in India: the Andhra Pradesh eye disease study. ... Krishnamurthy H, Tanushree V¸D'Silva AJ, Mobin G, Kantharaju KP. Prevalence of refractive errors among school children of 5-15 years age group in Mysore district. Int J Sci Stud 2014; 2(8):150-154. ...doi:10.1371/journal.pone.0240750 pmid:33075102 fatcat:aobraujg4bdkrahyhagbb54c2e
Shoot regeneration from in vitro derived explants have been reported in other plants such as Decalepis hamiltonii by Giridhar et al. (2004) ; Vaccinium corymbosum (Billings et al. 1988) ; Pyrus communis ... explant of Momordica cymbalaria (Nikam et al. 2009 ); Elaeagnus angustifolia (Karami and Piri 2009 ) and from internode of Withania somnifera (Kulkarni et al. 2000) and Piper colubrinum (Kelkar and Krishnamurthy ...doi:10.1590/s1516-89132013000300010 fatcat:6h426hyonraq5c7i2ildowpdvi
., (2002) in fennel, Krishnamurthy et al., (2000) , Premnath et al., (2008) and Naruka et al., (2012) in ajowan. ...doi:10.20546/ijcmas.2020.907.101 fatcat:cmczoaawg5eihltttkzrpdzyja
Giridhar, Balachandra B. Krishnamurthy, Chunhua Zhao, Priyan R. Patkar, and Santhoji Katare. ...arXiv:2008.09575v1 fatcat:abp2objhbfhwnnzciib6is3zm4
Indian Journal of Fundamental and Applied Life Sciences
Krishnamurthy and Giridhar (1976) used the water soluble annatto dye in orange squash, synthetic syrup, mango pulp and tomato ketchup, and found that the colour is stable for a period of 2 months. ... It was also shown that using abiotic elicitors as a tool to improve the annatto pigment yield on standing crop (Giridhar and Parimalan 2010) is feasible. ...fatcat:otkeqye6dvbhbpn5cxr4e6ixpy
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