Proceedings ArticleDOI
Dynamic time-division-duplex wireless local loop
Junsong Li,S. Farahvash,Mohsen Kavehrad,Reinaldo A. Valenzuela +3 more
- Vol. 3, pp 1078-1085
TLDR
In this paper, the authors show that in D-TDD cellular systems, performance is unacceptable, when an omni-directional antenna is used at base stations, due to a steady interference on an uplink in any cell caused by downlink transmissions in other cells.Abstract:
There are many benefits in using time-division-duplex (TDD) instead of frequency division duplex (FDD) schemes in fixed wireless cellular systems. To name a few channel reciprocity for a single carrier frequency used on both up and down-link will allow easy access to channel state information, reduced complexity of RF design, much higher flexibility in handling dynamic traffic, simpler frequency plan, etc. However, there exists a serious limiting factor in using dynamic-TDD (D-TDD) in cellular systems. This is due to a steady interference on an up-link in any cell caused by down-link transmissions in other cells. Simulation results show in D-TDD cellular systems, performance is unacceptable, when an omni-directional antenna is used at base stations. Simulation results also suggest great potential for smart antennas in achieving substantial performance improvement in fixed D-TDD bandwidth-on-demand wireless systems.read more
Citations
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Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Andrew J. Viterbi,L.A. Weaver,Charles E. Iii Del Mar Wheatley +5 more
TL;DR: It is concluded that properly augmented and power-controlled multiple-cell CDMA (code division multiple access) promises a quantum increase in current cellular capacity.
Patent
System access and synchronization methods for mimo ofdm communications systems and physical layer packet and preamble design
TL;DR: In this article, a method and apparatus for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system is provided, where correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values.
Journal ArticleDOI
Cochannel interference reduction in dynamic-TDD fixed wireless applications, using time slot allocation algorithms
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TL;DR: The proposed system shows promise, and offers a compromise between system complexity and network guaranteed availability, and the max{SIR} is a simpler and efficient algorithm for improving the outage performance.
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Frame structure, system and method for OFDM communications
TL;DR: In this paper, a method and apparatus for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system is provided, where correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values.
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Method and system for performing cell selection for OFDM communications
TL;DR: In this paper, a method and apparatus for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system is provided, where correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values.
References
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Journal ArticleDOI
On the capacity of a cellular CDMA system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Andrew J. Viterbi,L.A. Weaver,Charles E. Iii Del Mar Wheatley +5 more
TL;DR: In this paper, the interference-suppression feature of CDMA (code division multiple access) can result in a many-fold increase in capacity over analog and even over competing digital techniques.
Proceedings Article
On the capacity of a cellular CDMA system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Andrew J. Viterbi,L.A. Weaver,Charles E. Iii Del Mar Wheatley +5 more
TL;DR: It is concluded that properly augmented and power-controlled multiple-cell CDMA (code division multiple access) promises a quantum increase in current cellular capacity.
Book
Principles of mobile communication
TL;DR: The Principles of Mobile Communication, Third Edition stresses the "fundamentals" of physical-layer wireless and mobile communications engineering that are important for the design of "any" wireless system.
Book
Introduction to Adaptive Arrays
TL;DR: This second edition is an extensive modernization of the bestselling introduction to the subject of adaptive array sensor systems, taking the reader by the hand and leading them through the maze of jargon that often surrounds this highly technical subject.
Journal ArticleDOI
Signal acquisition and tracking with adaptive arrays in the digital mobile radio system IS-54 with flat fading
TL;DR: In this paper, the performance of the least-mean-square (LMS) and direct matrix inversion (DMI) algorithms in the North American digital mobile radio system IS-54 was investigated.