Results 171 to 180 of about 5,465 (214)
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A MC-CDMA Indoor Geolocation System
2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications, 2006A direct sequence spread spectrum (DSSS), orthogonal frequency division multiple access (OFDM), code division multiple access (CDMA) and frequency division multiple access (FDMA) (or MC-CDMA) indoor geolocation system is presented and discussed in this paper.
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MC-CDMA Indoor Optical Wireless System
IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference, 2007Multicarrier code division multiple access (MC-CDMA) is a transmission scheme that combines the robustness of orthogonal modulation with the flexibility of CDMA schemes. It can lower the symbol rate and is therefore suited to the bandwidth limited optical wireless indoor channel.
Fuad E. Alsaadi, Jaafar M. H. Elmirghani
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Forward-Link Capacity Analysis for MC-CDMA
IEICE Transactions on Communications, 2005OFDM-based networks utilizing the frequency reuse factor of 1 may produce the severe ICI (intercell interference) at the cell boundary even though overall cell capacity is increased and network deployment is facilitated. In the forward-link, the ICI may rise above a QoS (quality of service) threshold beyond some distance from BSs (base stations).
Hyukmin Son, Sanghoon Lee 0001
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MC-CDMA HARQ with Variable Spreading Factor
2006 IEEE 63rd Vehicular Technology Conference, 2006This paper presents a hybrid automatic repeat request (HARQ) with variable spreading factor (VSF) suitable for a multicarrer code division multiple access (MC-CDMA). We consider a HARQ based on incremental redundancy (IR) strategy. The throughput of MC-CDMA HARQ is a tradeoff among the frequency diversity gain, the coding gain and the inter-code ...
Shinsuke Takaoka +2 more
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2008 International Conference on Microwave and Millimeter Wave Technology, 2008
MC-CDMA is a promising candidate for the next generation network (NGN). In MC-CDMA systems, each data undergoes a different channel condition and arrives with a different error rate at the base station. By transmitting message data based on the Channel State Information (CSI), a new data transmission scheme called "Adaptive Multi-Carrier CDMA" is ...
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MC-CDMA is a promising candidate for the next generation network (NGN). In MC-CDMA systems, each data undergoes a different channel condition and arrives with a different error rate at the base station. By transmitting message data based on the Channel State Information (CSI), a new data transmission scheme called "Adaptive Multi-Carrier CDMA" is ...
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Joint Transceiver Optimization in MC-CDMA Systems
IEICE Transactions on Communications, 2009Multicarrier code division multiple access (MC-CDMA) systems are well suited for high data rate wireless multimedia services, due to their ability to convert frequency-selective fading channels to distinct flat fading channels with low complexity fast Fourier transform (FFT) devices.
Kyoungnam Seo, Haniph A. Latchman
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Cross-Layer Resource Allocation for MC-CDMA
2007 4th International Symposium on Wireless Communication Systems, 2007In this work we investigate the behaviour of a cross- layer resource assignment scheme for a multi-carrier code division multiple access cellular system composed of two separate stages named Resource Allocation and Scheduling, air interface- aware and unaware respectively. More precisely, we consider different combinations of three scheduling and three
CORVINO, VIRGINIA +2 more
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Channel construction in SCS-MC-CDMA system
IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004, 2005This paper promises a chip-by-chip channel estimation method for time domain spreading MC-CDMA systems to allow the use of MMSEC. MMSEC effectively compensates the loss of orthogonality among spreading codes, so that we can realize high communication quality even in very fast fading environments.
Teruya Fujii +3 more
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Multi-Rate Access Schemes for MC-CDMA
Wireless Personal Communications, 2003In order to accommodate different types of traffic in future wireless communications, it is necessary to consider a system, which can operate satisfactorily at multiple transmission rates. Due to its capability to cope with the hostile frequency selective fading, that limits transmission rate, and its suitability to handle multi-rate data, multi ...
Mizhou Tan +2 more
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DOA Estimation for MC-CDMA Uplink Transmissions
2007We consider the uplink of an MC-CDMA network and assume that the base station is endowed with a uniform linear array. Transmission takes place over a multipath channel and the goal is the estimation of the directions of arrival (DOAs) of the signal from the active users.
D'AMICO, ANTONIO ALBERTO +2 more
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