Paper Info
Title
Turbo Receiver for MIMO-CDMA Systems Employing Parity Bit Selected and Permutation Spreading.
Abstract
In this paper, a turbo receiver for MIMO-CDMA systems employing parity bit selected and permutation spreading is proposed. In such systems, spreading codes used by transmit antennas are dependent on the transmitted data. In the proposed system, convolutional coding is used as an outer code, while the parity bit selected scheme is used as the inner code. Detection and decoding are performed iteratively for each detected bit. When parity bit selected spreading is used, the parity bits generated by a linear block encoder are used to select a spreading code from a set of orthogonal spreading sequences. The selected spreading code is then used to spread the signals in all transmit antennas. In contrast, in permutation spreading, a permutation of orthogonal spreading sequences is used in each transmit antenna. In the proposed receiver, soft information passes between the detector and the decoder on multiple iterations. Detection is performed using the received signal from all receive antennas in combination with the extrinsic likelihood provided by a SISO decoder. The turbo receiver is further extended to a multiple user system, where the MAI is estimated in each iteration and subtracted out from the received signal. Simulations show a significant improvement in BER when a turbo receiver is used in these systems.
Year
DOI
Venue
2013
10.1186/1687-1499-2013-266
EURASIP J. Wireless Comm. and Networking
Keywords
Field
DocType
Spreading Code, Extrinsic Information, Multiple Access Interference, Code Division Multiple Access System, Multiple Input Multiple Output System
Turbo,Parity bit,Concatenated error correction code,Convolutional code,Computer science,Permutation,MIMO,Algorithm,Real-time computing,Theoretical computer science,Encoder,Decoding methods
Journal
Volume
Issue
ISSN
2013
1
1687-1499
Citations 
PageRank 
References 
8
0.35
8
Authors
2
Name
Order
Citations
PageRank
Alireza Mirzaee1133.15
Claude D'Amours24412.78