Paper Info
Title
Permutation spreading for asynchronous MIMO-CDMA systems using Hadamard codes and gold scrambling sequences
Abstract
Permutation spreading has been proposed as an alternative technique for assigning spreading codes to the different transmit antennas of a user in a Multiple Input Multiple Output Code Division Multiple Access (MIMO-CDMA) system. In this paper, we propose the use of the permutation spreading technique using Hadamard codes for antenna separation and Gold scrambling codes for user separation. All users are assigned the same set of Hadamard sequences, thus our proposed technique reduces the overall number of spreading sequences required by the system. In the example shown in the paper, the proposed spreading combination allows both an increase in spectral effciency and a four-fold decrease in the number of spreading codes needed by the system. Moreover, permutation spreading shows more than 7dB advantage over conventional MIMO-CDMA system in a heavily loaded environment.
Year
DOI
Venue
2009
10.1109/WCNC.2009.4917905
WCNC
Keywords
Field
DocType
asynchronous mimo-cdma system,overall number,hadamard sequence,antenna separation,proposed technique,multiple input multiple output,user separation,alternative technique,code division multiple access,conventional mimo-cdma system,hadamard code,indexing terms,bit error rate,cdma,correlators,mimo,gold,data engineering,spectral efficiency,frequency,error correction
Scrambling,Computer science,Permutation,MIMO,Algorithm,Error detection and correction,Theoretical computer science,Real-time computing,Code division multiple access,Hadamard code,Hadamard transform,Bit error rate
Conference
ISSN
Citations 
PageRank 
1525-3511
1
0.36
References 
Authors
5
2
Name
Order
Citations
PageRank
Claude D'Amours14412.78
Adel Omar Dahmane2248.77