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An Optimal Asynchronous IDMA Receiver

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Date

2009

Authors

Senanayake, Bathiya
Reed, Mark
Shi, Zhenning

Journal Title

Journal ISSN

Volume Title

Publisher

Institute of Electrical and Electronics Engineers (IEEE Inc)

Abstract

In this paper we develop an optimal receiver for an asynchronous IDMA system. A super-block structure is used to formulate the band diagonal matrix model for asynchronous IDMA. We show that the cost function for the ML decoder can be viewed as a path metric through a structured trellis. We use a dynamic programming algorithm to find the maximum likelihood transmitted bit sequence. We compare the performance of the optimal receiver with the conventional iterative receiver. Our results show that the optimal asynchronous IDMA receiver outperforms the iterative IDMA receiver for the IDMA systems with small block sizes that we simulated.

Description

Keywords

Keywords: Block sizes; Block structures; Diagonal matrices; Dynamic programming algorithm; Iterative receivers; ML decoder; Optimal receiver; Path metric; Maximum likelihood; Optimization; Systems engineering; Dynamic programming

Citation

URI

http://hdl.handle.net/1885/51582

Collections

ANU Research Publications

Source

Proceedings of the Australian Communications Theory Workshop (AusCTW 2009)

Type

Conference paper

Book Title

Entity type

Access Statement

License Rights

DOI

10.1109/AUSCTW.2009.4805595

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