DocumentCode :
3505023
Title :
Improved Throughput over Wirelines with Adaptive MC-DS-CDMA
Author :
CrussiÈre, Matthieu ; Baudais, Jean-Yves ; HÉlard, Jean-Franqois
Author_Institution :
Electron. & Telecommun. Res. Inst. of Rennes, INSA, Rennes
fYear :
2006
fDate :
28-31 Aug. 2006
Firstpage :
143
Lastpage :
147
Abstract :
In this paper, we present a finite-granularity loading algorithm for multicarrier direct sequence code division multiple access (MC-DS-CDMA). The resulting adaptive scheme represents an extension of classical digital multitone (DMT) with spreading in the time domain. The presented algorithm assigns subcarriers, spreading codes, bits and energy per code in order to maximize the data rate in a single user network, or to maximize the minimum data rate in a multiuser network. The optimization is realized at a target symbol error rate and for a given power spectral density (PSD). Optimal allocation is performed through analytical study, and simulation results of the new scheme are presented in single user digital subscriber line (DSL) and multiuser power line communication (PLC) contexts. Compared to DMT, it is shown that the time spreading component of MC-DS-CDMA system yields throughput improvement against a weak increase of complexity
Keywords :
carrier transmission on power lines; code division multiple access; digital subscriber lines; error statistics; spread spectrum communication; time-domain analysis; DSL; PLC; PSD; adaptive MC-DS-CDMA; digital subscriber line; finite-granularity loading algorithm; multicarrier direct sequence code division multiple access; multiuser network; multiuser power line communication; optimal allocation; power spectral density; spreading codes; symbol error rate; time domain analysis; Analytical models; Context modeling; DSL; Direct-sequence code-division multiple access; Error analysis; OFDM modulation; Performance analysis; Power line communications; Programmable control; Throughput;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Spread Spectrum Techniques and Applications, 2006 IEEE Ninth International Symposium on
Conference_Location :
Manaus-Amazon
Print_ISBN :
0-7803-9779-7
Electronic_ISBN :
0-7803-9780-0
Type :
conf
DOI :
10.1109/ISSSTA.2006.311751
Filename :
4100540
Link To Document :
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