The demand for spectrum resources has increased in the past decade due to the flourishing wireless industry worldwide. This change requires Japan's Ministry of Internal Affairs and Communications (MIC) to establish a transparent, fair and efficient spectrum allocation process that will enable it to select an optimal set of licensees to realize efficient spectrum use. This thesis proposes an auc...

Buuer management schemes are needed in shared-memory ATM switches to regulate the sharing of memory among diierent output port queues and among traac classes with diierent loss priorities. Earlier we proposed a single-priority scheme called Dynamic Threshold, in which the maximum permissible queue length is proportional to the unused buuering in the switch. In this paper, we propose and analyze...

Cross-layer design approaches are critical to efficiently utilize radio resources. Resource allocation decision is made by assuming a single user. Multiple access scheme used is an Orthogonal Frequency Division Multiple Access (OFDM). With the goal of choosing best error detection technique, various techniques are compared. A resource allocation algorithm is required to efficiently allocate pow...

This paper 1 presents a novel approach to dynamic transmission bandwidth allocation for transport of real-time variable-bit-rate video in ATM networks. Describe video traf-c in the frequency domain: the low frequency signal captures the slow time-variation of consecutive scene changes; the high frequency signal exhibits the feature of strong frame autocorrelation. Our study indicates that the v...

It is foreseen that a single (wideband) air interface mode is not sufficient for achieving the high spectral efficiency targets set for next generation wireless system. A dual-bandwidth approach is adapted to simultaneously provide wide coverage and high capacity in a large range of different operating environments. In this paper, hybrid diversity-multiplexing scheme, where Space-time Turbo Cod...

This pape? presents a novel approach to dynamic transmission bandwidth allocation for transport of real-time variable-bit-rate video in ATM networks. Describe video traffic in the frequency domain: the low frequency signal captures the slow time-variation of consecutive scene changes; the high frequency signal exhibits the feature of strong frame autocorrelation. Our study indicates that the vi...

This paper presents a novel approach to dynamic transmission bandwidth allocation for transport of real-time variable-bit-rate video in ATM networks. Describe video traac in the frequency domain: the low frequency signal captures the slow time-variation of consecutive scene changes; the high frequency signal exhibits the feature of strong frame autocorrelation. Our study indicates that the vide...

This paper presents a novel approach to dynamic transmission bandwidth allocation for transport of real-time variable-bit-rate video in ATM networks. Video traac statistics are measured in the frequency domain: the low frequency signal captures the slow time-variation of consecutive scene changes while the high frequency signal exhibits the feature of strong frame autocorrelation. Our queueing ...

In reading research, a longstanding question is whether any stages of lexical processing require central attention, and whether such potential demands are frequency-sensitive. In the present study, we examined the allocation of cognitive effort in lexical processing by examining pupil dilations and naming latencies in a modified delayed naming procedure. In this dual-task/change procedure, part...

In the prevailing cellular environment, it is important to provide the resources for the fluctuating traffic demand exactly in the place and at the time where and when they are needed. In this paper, we explored the ability of hierarchical cellular structures with inter layer reuse to increase the capacity of mobile communication network by applying total frequency hopping (T-FH) and adaptive f...