Journal ArticleDOI
Smart antenna arrays for CDMA systems
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TLDR
Channel-modeling issues, receiver structures, and algorithms, and the potential capacity gains that can be achieved in antenna arrays for the mobile-to-base-station or reverse link of a CDMA cellular system are considered.Abstract:
There are a diverse range of products and services currently on the market, but cellular or personal communications services (PCS) radio networks probably have the highest public profile. These services provide highly mobile, widely accessible two-way voice and data communications links. In general, the most complex and expensive part of the radio path for these systems is the base station. As a result, manufacturers have been designing networks that have high efficiency in terms of the bandwidth occupied and the number of users per base station. Base station antenna arrays are a promising method for providing large capacity increases in cellular mobile radio systems. This article considers channel-modeling issues, receiver structures, and algorithms, and looks at the potential capacity gains that can be achieved. It considers antenna arrays for the mobile-to-base-station or reverse link of a CDMA cellular system. It begins with an introduction to CDMA communications systems and also addresses the general topic of antenna array receivers.read more
Citations
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Journal ArticleDOI
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TL;DR: A spatial and temporal communication theory based on an adaptive antenna array, such as spatial andporal channel modeling, equalization, optimum detection for single-user and multi-user CDMA, precoding in a transmitter, and joint optimization of both transmitter and receiver is introduced.
Journal ArticleDOI
Power control and capacity of spread spectrum wireless networks
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TL;DR: Although spread-spectrum communications has been traditionally viewed as a physical-layer subject, it is argued that by suitable abstraction, many control and optimization problems with interesting structure can be formulated at the network layer.
References
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Journal ArticleDOI
Beamforming: a versatile approach to spatial filtering
B.D. Van Veen,K.M. Buckley +1 more
TL;DR: An overview of beamforming from a signal-processing perspective is provided, with an emphasis on recent research.
Journal ArticleDOI
The impact of antenna diversity on the capacity of wireless communication systems
TL;DR: In this paper, the authors show that a significant increase in system capacity can be achieved by the use of spatial diversity (multiple antennas), and optimum combining, for a broad class of interference-dominated wireless systems including mobile, personal communications, and wireless PBX/LAN networks.
The impact of antenna diversity on the capacity of wireless communication systems
TL;DR: For a broad class of interference-dominated wireless systems including mobile, personal communications, and wireless PBX/LAN networks, the authors show that a significant increase in system capacity can be achieved by the use of spatial diversity (multiple antennas), and optimum combining.
Journal ArticleDOI
Linear Diversity Combining Techniques
TL;DR: Analysis of three types of diversity combining systems in practical use, finding that the simplest possible combiner, the equal-gain system, will generally yield performance essentially equivalent to the maximum obtainable from any quasi-linear system.
Journal ArticleDOI
Overview of cellular CDMA
TL;DR: A general description of CDMA is presented in this paper, where the authors highlight the potential for increasing capacity in future cellular communications, and the power control schemes in CDMA are analyzed in detail.