Multiple access over wireline channels using orthogonal signaling

Ahmed F. Shalash, Keshab K. Parhi

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


With the emerging high-rate wireline channels, multiple access is inevitable. In this paper the multiple access problem over wireline channels is solved using orthogonal signaling. The 2-D FIR CAP/QAM based line code is extended to multi-dimensional system to accommodate multiple access topology. Using the well known Orthogonality Division Multiple Access, ODMA, we can achieve better theoretical and practical advantages over the Time Division Multiple Access and Frequency Division Multiple Access. The problem of increasing the number of dimensions is stated as a minimax optimization problem, then solved using the sequential quadratic programming. 3, 4, and 6-dimensional systems are introduced to support multiple access applications. The superiority of the ODMA over other multiple access techniques is shown in light of the receiver equalizer performance. Computer simulations are carried out to evaluate the performance of the new line code.

Original languageEnglish (US)
Pages (from-to)IV-580-IV-583
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - 1999
EventProceedings of the 1999 IEEE International Symposium on Circuits and Systems, ISCAS '99 - Orlando, FL, USA
Duration: May 30 1999Jun 2 1999


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