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antenna
(4519 results)-
Whitepapers
System Layer Evaluation of Joint Detection and Imperfect Adaptive Beam-Forming Antenna for Packet Services in the LCR TD-CDMA System
August 20, 2007 12:00am PDT
Both Adaptive Beam-forming Antenna (ABA) and Joint Detection (JD) are key techniques in the LCR (Low Code Rate) TD-CDMA system. ABA is adopted to suppress multi-path fading with antenna diversity...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Joint Optimization of the Transmit Antenna Array Geometry and Linear Precoding for MIMO Systems
August 20, 2007 12:00am PDT
For a cellular system with a fixed number of transmit antennas at each base station, the authors investigate how the data rate on the downlink varies as a joint function of the geometry of the...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
On Cellular MIMO Spectrum Efficiency
August 20, 2007 12:00am PDT
To increase the transmission rate without bandwidth expansion, Multiple-Input Multiple-Output (MIMO) technique has been attracting much attention. When MIMO technique is applied to a cellular...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
A New MIMO System for Gbps Transmission
August 20, 2007 12:00am PDT
In this paper, a receiver algorithm for an 8x8 MIMO system is considered for Giga-bps data transmission, in which the decoding complexity and latency are crucial factors for implementation of MIMO...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Low-Complexity Transmit Beamforming for MIMO Systems
August 20, 2007 12:00am PDT
This paper proposes a simple downlink transmit beamforming scheme for multiple-input multiple-output systems with low complexity. The authors first introduce the beamforming system where the Base...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Outage Probability of MIMO Systems with Receive Antenna Selection in Spatially Correlated Rayleigh Fading Channels
August 20, 2007 12:00am PDT
The authors consider a receive antenna selection MIMO system, where only one receive antenna is selected out of Nr antennas. Spatial channel correlation will be considered at the receiver side...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Downlink Steered Space-Time Spreading Assisted Generalised Multicarrier DS-CDMA Using Sphere-Packing-Aided Multilevel Coding
August 20, 2007 12:00am PDT
This paper presents a novel generalised Multi-Carrier Direct Sequence Code Division Multiple Access (MC DS-CDMA) system invoking smart antennas for improving the achievable performance in the...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Peak Power Characteristics of Single Carrier FDMA MIMO Precoding System
August 20, 2007 12:00am PDT
A salient advantage of Single Carrier Frequency Division Multiple Access (SC-FDMA) is low Peak-to-Average Power Ratio (PAPR) which is lower than that of OFDMA. Precoding using Transmit BeamForming...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Finite Impulse Response Cyclic Shift Transmit Diversity for Broadband Mobile OFDM
August 20, 2007 12:00am PDT
This paper introduces an open-loop transmit diversity method called Finite Impulse Response Cyclic Shift Diversity (FIR-CSD) for broadband mobile OFDM systems. Ordinary CSD operates in OFDM by...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Design of Novel Orthogonal Space-Time-Frequency Block Codes for OFDM Systems Over Fading Channel Environments
August 20, 2007 12:00am PDT
In this paper, the authors propose a novel orthogonal Space-Time-Frequency Block Codes using Alamouti scheme for OFDM systems (STFBC-OFDM) employing two transmit antennas. Space-Time Block Coded...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Generalized Cyclic Delay Diversity for Orthogonal Frequency Division Multiplexing
August 20, 2007 12:00am PDT
In this paper, the authors propose a generalized version of Cyclic Delay Diversity (CDD) which is a popular form of space - frequency coding for multi - antenna Orthogonal Frequency Division...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Data Aided Symbol Timing Estimation in Space-Time Coded CPM Systems Over Rayleigh Fading Channels
August 20, 2007 12:00am PDT
The technology of Space-Time Coded Continuous Phase Modulation (STC-CPM) has aroused considerable attention recently in wireless communication systems for improving the capacity and data rate...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Impact of Array Configuration on Channel-And Noise-Covariance in Multiple Antenna Systems
August 20, 2007 12:00am PDT
In this paper an analytical description for the transmission between multiple antennas is developed. The method allows the determination of co-variances and channel capacity with respect to...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Effect of Line-of-Sight on Dual-Hop Nonregenerative Relay Wireless Communications
August 20, 2007 12:00am PDT
In this paper, the authors analyze the effect of the Line-Of-Sight (LOS) on the Symbol Error Probability (SEP) of non-regenerative cooperation in Multiple-Input Multiple-Output (MIMO) dual-hop...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
EXIT Chart Analysis of Low-Complexity Bayesian Turbo Multiuser Detection for Rank-Deficient Multiple Antenna Aided OFDM
August 20, 2007 12:00am PDT
This paper studies the mutual information transfer characteristics of a novel low-complexity Bayesian Multi-User Detector (MUD) proposed for employment in Space Division Multiple Access (SDMA)...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Space-Time Trellis Coding Exploiting Superimposed Transmissions in Half-Duplex Relay Networks
August 20, 2007 12:00am PDT
This paper presents and analyzes a cooperative relaying approach which offers large scale spatial diversity and an additional coding advantage in a virtual antenna array. It utilizes a network of...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Enhanced Lattice-Reduction-Based Precoder with List Quantizer in Broadcast Channel
August 20, 2007 12:00am PDT
In the multiple-antenna broadcast channel, each user is not allowed to cooperate with other users, so the efficient and well-designed precoding scheme to reduce other users' interferences is...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
On Sum Rate of Multi-User Distributed Antenna System with Circular Antenna Layout
August 20, 2007 12:00am PDT
In this paper, the authors investigate the uplink of a power-controlled multi-user Distributed Antenna System (DAS) with antennas deployed on a circle. Applying results from random matrix theory,...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Non-Collaborative Zero-Forcing Beamforming in the Presence of Co-Channel Interference and Spatially Correlated Channels
August 20, 2007 12:00am PDT
Recent results proposed optimal Zero-Forcing BeamForming (ZFBF) methods for non-collaborative space division multiple access systems when the Base Station (BS) as well as the Subscriber Stations...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Frequency Impact on the Indoor MIMO Channel Capacity Between 2 and 12 GHz
August 20, 2007 12:00am PDT
The spectral efficiency of MIMO (Multiple Input Multiple Output) channels is limited by both the spatial correlation and rank deficiency of the channel. Precedent studies have focused less...
Provided by: Institute of Electrical & Electronic Engineers
