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ICASSP
2011
IEEE
8 years 2 months ago
Robust frequency synchronization for an OFDMA uplink system disturbed by a Cognitive Radio system interference
In Cognitive Radio (CR) systems, spectrum sensing plays a key role to determine the free frequency bands. However, when the primaryuser (PU) signal spectrum exhibits localized fad...
Hector Poveda, Guillaume Ferre, Eric Grivel
TWC
2010
8 years 5 months ago
Fairness-aware radio resource management in downlink OFDMA cellular relay networks
Abstract-- Relaying and orthogonal frequency division multiple access (OFDMA) are the accepted technologies for emerging wireless communications standards. The activities in many w...
Mohamed Salem, Abdulkareem Adinoyi, Mahmudur Rahma...
TWC
2011
275views more  TWC 2011»
8 years 6 months ago
A Novel Uplink Multiple Access Scheme Based on TDS-FDMA
—This contribution proposes a novel time-domain synchronous frequency division multiple access (TDS-FDMA) scheme to support multi-user uplink application. A unified frame struct...
Linglong Dai, Zhaocheng Wang, Sheng Chen
ICC
2009
IEEE
118views Communications» more  ICC 2009»
8 years 9 months ago
Downlink Resource Allocation for OFDMA-Based Multiservice Networks with Imperfect CSI
Abstract--This paper addresses practical implementation issues of resource allocation in OFDMA networks: inaccuracy of channel state information (CSI) available to the resource all...
Mohamad Khattar Awad, Veluppillai Mahinthan, Mehri...
GLOBECOM
2010
IEEE
8 years 9 months ago
Carrier Frequency Offset Estimation for Uplink OFDMA Using Partial FFT Demodulation
Fast and accurate Carrier Frequency Offset (CFO) estimation is a problem of significance in many multi-carrier modulation based systems, especially in uplink Orthogonal Frequency D...
Srinivas Yerramalli, Milica Stojanovic, Urbashi Mi...
GLOBECOM
2010
IEEE
8 years 9 months ago
Performance of Opportunistic Spectrum OFDMA Network with Users of Different Priorities and Traffic Characteristics
We propose an analytical model to assess the throughput and connection blocking rate of Opportunistic Spectrum Orthogonal Frequency Division Multiple Access network constituted of ...
Jihoon Park, Przemyslaw Pawelczak, Pål Gr&os...
WIOPT
2010
IEEE
8 years 9 months ago
Fractional frequency reuse and interference suppression for OFDMA networks
—The downlink performance of cellular networks is known to be strongly limited by inter-cell interference. In order to mitigate this interference, a number of frequency reuse sch...
Rizwan Ghaffar, Raymond Knopp
VTC
2010
IEEE
147views Communications» more  VTC 2010»
8 years 9 months ago
Generalized Proportionally Fair Scheduling for Multi-User Amplify-and-Forward Relay Networks
—Providing ubiquitous very high data rate coverage in next generation wireless networks is a formidable goal, requiring cost-effective radio access network (RAN) devices, such as...
Alireza Sharifian, Petar Djukic, Halim Yanikomerog...
TWC
2008
119views more  TWC 2008»
8 years 11 months ago
Flow-level performance of opportunistic OFDM-TDMA and OFDMA networks
Abstract--In this paper, the flow-level performance of opportunistic scheduling in orthogonal frequency division multiplexing (OFDM) networks is studied. The analysis accounts for ...
Lei Lei, Chuang Lin, Jun Cai, Xuemin Shen
JSAC
2007
130views more  JSAC 2007»
8 years 11 months ago
Cross-layer QoS Analysis of Opportunistic OFDM-TDMA and OFDMA Networks
Abstract— Performance analysis of multiuser orthogonal frequency division multiplexing (OFDM-TDMA) and orthogonal frequency division multiple access (OFDMA) networks in support o...
Yu-Jung Chang, Feng-Tsun Chien, C. C. Jay Kuo
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