MC-CDMA (MultiCarrier Code Division Multiple Access), currently regarded as a promising multiple access scheme for broadband communications, is known to combine the advantages of an OFDM-based (Orthogonal Frequency Division Multiplexing), CP-assisted (Cyclic Prefix) block transmission with those of CDMA systems. Recently, it was recognized that DS-CDMA (Direct Sequence) implementations can also...

This paper discusses the application of different algorithm transformation techniques in Code Division Multiple Access receivers (CDMA). This is achieved by looking at some of the computational blocks that constitute the CDMA receivers. We focus on the Look-Ahead, Relaxed Look-ahead and Strength Reduction algorithm transformation techniques and demonstrate how CDMA receivers could benefit when ...

The crop model data assimilation approach has been acknowledged as an effective tool for monitoring growth and estimating yield. However, the choice of assimilated variables mismatch in scale between remotely sensed observations model-simulated state have various effects on performance yield estimation. This study aims to examine accuracy estimation through joint leaf area index (LAI) soil mois...

In this paper, the near-far resistance of the minimum mean square error (MMSE) detector is derived for the multicarrier direct sequence code division multiple access (MC-DS-CDMA) communication systems. It is shown that MC-DS-CDMA has better performance on near-far resistance than that of DS-CDMA.

This report examines optical CDMA communication techniques with optical orthogonal codes. Simulations that show the desired properties of theses codes and their use in optical CDMA are reported. Based on the simulations, we investigate the properties of optical CDMA. Proba bility of error is also evaluated.

it is shown in [1] that the optimal downlink radio resource allocation for non-realtime traffic in cellular cdma/tdma networks can be mapped to a multi-dimensional multiple-choice knapsack problem (mmkp) which is np-hard. in this correspondence we propose a heuristic algorithm with polynomial time complexity for this problem. numerical results indicate significant computational performance impr...

This paper proposes a Multi-Code Multi-Carrier CDMA, best suited for multi-rate services using multicode schemes and multi-carrier services used for high rate transmission as required for the Universal Telecommunication Mobile Systems (UMTS) Long Term Evolution (LTE). The system performance has been analyzed and evaluated by means of signal-to-noise plus interference ratio and bit error rate un...

A Scalable hierarchical architecture based Code-Division Multiple Access (CDMA) is proposed for high performance Network-on-Chip (NoC). This hierarchical architecture provides the integration of a large number of IPs in a single on-chip system. The network encoding and decoding schemes for CDMA transmission are provided. The proposed CDMA NoC architecture is compared to the conventional archite...