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ABSTRACT: Beyond third generation (B3G) and fourth generation (4G) communication systems require bandwidth efficiency and low complexity receivers to accommodate high data rate and large number of users per cell. This paper provides the recommendations for why interleave division multiple access (IDMA) stands out among all the present day multiple access systems. Even if IDMA is a special case of code division multiple access (CDMA), it simply trounces CDMA as far as the cell capacity is concerned. In IDMA, interleavers are used as the only means for user separation. Interleaver size can be varied for a set of users but the recommended interleaver size is 1024 bits at which it provides better efficiency and minimum processing delay. Investigations carried throughout this paper are while using 1024 bit interleavers. IDMA exhibits the tendency to handle huge number of users.
Innovations in Information Technology, 2008. IIT 2008. International Conference on; 01/2009
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ABSTRACT: The parallel and simultaneous execution of repetitive functions can be used to overcome the significant time delays involved in previous simulations of IDMA system. A practical suboptimal design of the IDMA system involving parallel execution techniques is implemented in Simulink and the simulations demonstrate that the time delays are considerably reduced without compromising the results.
Sarnoff Symposium, 2008 IEEE; 05/2008
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ABSTRACT: This paper adopts a deterministic approach to propose a modified elementary signal estimator (ESE) for chip by chip iterative multi-user detection (MUD) in IDMA systems. We first outline the basic principles of IDMA and then proceed to provide the details of the detection algorithm. The technique is remarkably simple and involves fewer iterations as compared to the elementary signal estimatorpsilas detection algorithm.
High Capacity Optical Networks and Enabling Technologies, 2007. HONET 2007. International Symposium on; 12/2007
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ABSTRACT: Modulation identification and the recovery of the carrier lead to many applications in the digital communication system. Techniques developed so far for carrier recovery and modulation identification are all statistical. In this paper efforts are made to use a deterministic method rather than statistical. Zero crossing detection method is recommended for use to recover carrier from frequency and amplitude modulated systems. In this paper some modifications have been suggested for the application of the same system to make it useful for QAM and PSK as well. Based on the method presented by R. W. Wall, a modified Zero Crossing Detection algorithm has been used for carrier and phase extraction from an M-ary PSK (differential and non-differential) system. In addition, method has been developed for M-ary PSK system identification.
Emerging Technologies, 2007. ICET 2007. International Conference on; 12/2007
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ABSTRACT: Interleave Division Multiple Access (IDMA) is one of the competitors for next generation wireless systems. IDMA not only inherits all the advantages of CDMA but also has the capability to overcome its deficiencies. In this paper, security analysis of IDMA system has been carried out through NIST tests and it has been found that it is highly secure on its own, not requiring any additional security device. In other words, IDMA exhibits security features of an efficient crypto system.
Wireless and Mobile Communications, 2008. ICWMC '08. The Fourth International Conference on;
