Frame-extended linear decorrelating detector for asynchronous CDMA

Frame-extended linear decorrelating detector for asynchronous CDMA

The standard linear decorrelating detector (LDD) for asynchronous code-division multiple access involves complicated computations and long detection delay. The one-shot LDD with a frame of 1-bit period length leads to a simpler architecture with less than 1-bit detection delay but significant noise...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology Vol. 49; no. 5; pp. 1918 - 1927
Main Authors: Mengkang Peng, Sasabo, M.F., Hingjie Jay Guo, Downing, O.J., Barton, S.K.
Format: Journal Article
Language:English
Published: New York, NY IEEE 01-09-2000
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Applied sciences
Code division multiplexing
Code standards
Computer architecture
Computer simulation
Decorrelation
Delay
Detectors
Equipments and installations
Exact sciences and technology
Feasibility
Frames
Mobile radiocommunication systems
Multiaccess communication
Multiple access
Noise
Noise reduction
Radiocommunications
Regulation
Scholarships
Telecommunications
Telecommunications and information theory
Anticorrelation
Asynchronism
Coding
Code division multiple access
Theoretical study
Numerical simulation
Processing time
Feasibility
Delay time
Detection
Asynchronous transmission
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Description
Summary:The standard linear decorrelating detector (LDD) for asynchronous code-division multiple access involves complicated computations and long detection delay. The one-shot LDD with a frame of 1-bit period length leads to a simpler architecture with less than 1-bit detection delay but significant noise enhancement compared with the standard LDD. In this paper, extending the frame to more than one bit period, a frame-extended LDD (FELDD) is proposed. With a slight increase of complexity and detection delay, the noise enhancement of the FELDD is greatly reduced compared with the one-shot LDD and approaches that of the standard DD. The total number of users supported is also increased compared with that of the one-shot LDD. Theoretical analysis and computer simulations are used to demonstrate the feasibility of the proposed scheme.
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ISSN:0018-9545
1939-9359
DOI:10.1109/25.892594