Successive AF/DF Relaying in the Cooperative DS-CDMA Uplink: Capacity Analysis and its System Architecture
Successive AF/DF Relaying in the Cooperative DS-CDMA Uplink: Capacity Analysis and its System Architecture
A successive relaying aided network (SRAN) is designed for a multi-user spread-spectrum scenario conceived for noncoherent (NC) detection in order to convert the typical 50% half-duplex relaying-induced throughput loss to a potential user-load reduction of the CDMA system, where the NC allows us to avoid the extra power consumption imposed by channel estimation. We commence by evaluating the noncoherent Discrete-input Continuous-output Memoryless Channel (DCMC) capacity of both the Amplify-and-Forward (AF) based and of the Decode-and-Forward (DF) based SRAN in the DS-CDMA uplink. Whilst NC detection has the added benefit of eliminating both the pilot-overhead and power-hungry channel estimation, it tends to form an error-floor at high Doppler frequencies. We mitigate this problem using multiple-symbol detection, which increases the detection complexity upon extending the detection window. Finally, a relay-aided soft-input soft-output Multiple-Symbol Differential Sphere Detection (SISO-MSDSD) CDMA regime is proposed, which significantly reduces the system’s complexity without sacrificing its performance.
655-666
Li, Li
8e6fbabd-aac6-4bb0-a273-a77750dc5b92
Wang, Li
48544830-2bcb-4cfa-a33e-343ebfbe4aac
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
February 2013
Li, Li
8e6fbabd-aac6-4bb0-a273-a77750dc5b92
Wang, Li
48544830-2bcb-4cfa-a33e-343ebfbe4aac
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Li, Li, Wang, Li and Hanzo, Lajos
(2013)
Successive AF/DF Relaying in the Cooperative DS-CDMA Uplink: Capacity Analysis and its System Architecture.
IEEE Transactions on Vehicular Technology, 62, .
(doi:10.1109/TVT.2012.2227855).
Abstract
A successive relaying aided network (SRAN) is designed for a multi-user spread-spectrum scenario conceived for noncoherent (NC) detection in order to convert the typical 50% half-duplex relaying-induced throughput loss to a potential user-load reduction of the CDMA system, where the NC allows us to avoid the extra power consumption imposed by channel estimation. We commence by evaluating the noncoherent Discrete-input Continuous-output Memoryless Channel (DCMC) capacity of both the Amplify-and-Forward (AF) based and of the Decode-and-Forward (DF) based SRAN in the DS-CDMA uplink. Whilst NC detection has the added benefit of eliminating both the pilot-overhead and power-hungry channel estimation, it tends to form an error-floor at high Doppler frequencies. We mitigate this problem using multiple-symbol detection, which increases the detection complexity upon extending the detection window. Finally, a relay-aided soft-input soft-output Multiple-Symbol Differential Sphere Detection (SISO-MSDSD) CDMA regime is proposed, which significantly reduces the system’s complexity without sacrificing its performance.
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VT-2011-01075.pdf
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Published date: February 2013
Organisations:
Southampton Wireless Group
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Local EPrints ID: 344900
URI: http://eprints.soton.ac.uk/id/eprint/344900
ISSN: 0018-9545
PURE UUID: 4de646e3-ee25-4a14-8665-34102be466dd
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Date deposited: 05 Nov 2012 21:53
Last modified: 18 Mar 2024 02:35
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Author:
Li Li
Author:
Li Wang
Author:
Lajos Hanzo
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