There has been intense effort in the past decade on developing multiuser receiver structures which mitigate interference between users in spread-spectrum systems. While much of this research is performed at the physical layer, the appropriate power control and choice of signature sequences in conjunction with multiuser receivers and the resulting network user capacity is not well understood. In...

We study the transmission rate (R) and bit-energy-to-interference ratio (Eb/I0) needed to maintain the desired QoS requirement for a given traffic while maximizing the user capacity in multimedia CDMA networks. Closed form functions among transmission rate, bit error rate (or equivalently Eb/I0), QoS requirements, and traffic characteristics are derived. Based on the dependence between R and Eb...

This paper describes the application of cognitive mapping techniques, for eliciting and representing cognitive structure, to the problem of user requirement capture for the design of an electronic database. The research is based upon the assumption that organising information so as to be compatible with the structure of users' knowledge will enhance information retrieval by supporting more effe...

This paper presents an overview of user studies in the Music Information Retrieval (MIR) literature. A focus on the user has repeatedly been identified as a key requirement for future MIR research; yet empirical user studies have been relatively sparse in the literature, the overwhelming research attention in MIR remaining systems-focused. We present research topics, methodologies, and design i...

41 Abstract The capability to easily find useful components has become increasingly importance in software reuse field. Current researches on component retrieval are mostly limited to retrieve the component whose function is most close to the user requirement. However, in the process of component retrieval, we frequently face the problem that the individual component can’t completely meet user’...

The Object-Oriented Petri Nets (OOPN) based integrated solution to a grid-based application system modeling and enacting is proposed in this paper for simplifying designs and developments of the grid-based applications. An Integrated Development Environment is also provided to support the methodology proposed. Visual modeling to the system can be made by using OOPN to give a reliable system str...

The requirements elicitation is a step between the user and developers to be precise and formal. This step requires understanding the requirements to be covered by the system and to express and formalize these requirements. For structuring, documenting and analysing user requirements, UML enjoys popularity within the academic and industrial communities. The use case diagram illustrates all func...

A Smart Grid (SG) facilitates bidirectional demand-response communication between individual users and power providers with high computation and communication performance but also brings about the risk of leaking users' private information. Therefore, improving the individual power requirement and distribution efficiency to ensure communication reliability while preserving user privacy is a new...

Interleave division multiple access (IDMA) scheme, uses interleavers for user separation. The selection of interleaver along with optimum design methodology for IDMA system leads to satisfactory results. An efficient interleaver must be easy to generate and should require low memory along with low correlation among interleavers. Existing Tree based interleaver has distinct advantage of low comp...