Title :
Orthogonal code division multiplexed DSL for interference suppression in cable networks
Author :
Su, Hsuan- Jung ; Geraniotis, Evaggelos ; Gerakoulis, Diakoumis P.
Author_Institution :
Inst. for Syst. Res., Maryland Univ., College Park, MD, USA
Abstract :
A new scheme termed orthogonal code division multiplexing (OCDM) is proposed for digital subscriber line (DSL) applications. Through the use of serial to parallel conversion and orthogonal codes, a “spreading gain” is achieved against narrowband interference without expanding the required transmission bandwidth of the information signal. Groups of orthogonal codes with different spreading gains and bandlimited (chip) filtering are used together with M-PAM data modulation. Spectral matching (to input power density that achieves the capacity of the copper cable channel) is performed followed by throughput optimization under a symbol error rate (SER) constraint in order to select the system parameters. The OCDM/DSL system performance is evaluated for several scenarios of interest
Keywords :
codes; digital subscriber lines; error statistics; interference suppression; multiplexing; optimisation; pulse amplitude modulation; spectral analysis; twisted pair cables; M-PAM data modulation; OCDM; OCDM/DSL system; bandlimited filtering; cable networks; chip filtering; copper cable channel; digital subscriber line; input power density; interference suppression; narrowband interference; orthogonal code division multiplexed DSL; orthogonal codes; serial to parallel conversion; spectral matching; spreading gain; symbol error rate; throughput optimization; Bandwidth; Code division multiplexing; Copper; DSL; Filtering; Impedance matching; Interference; Modulation coding; Narrowband; Throughput;
Conference_Titel :
Communications, 2000. ICC 2000. 2000 IEEE International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-6283-7
DOI :
10.1109/ICC.2000.853662
