báo cáo hóa học:" Research Article Resource Allocation for the Multiband Relay Channel: A Building Block for Hybrid Wireless Networks" ppt

... multiple frequency bands available from the source and the relay are mutually orthogonal. In particular, the situation where, among total k channels, there are m channels available for the source node and k − ... investigate optimal resource allocation for the multiband relay channel. We find the optimal power and bandwidth allocation strategies that maximize the...

Ngày tải lên: 21/06/2014, 18:20

... to maximize the data rate and the range of the communication system. The optimization is realized at a target symbol error rate and under spectral mask constraint as usually imposed. The analytical ... im- plies that the channel state information (CSI) can be made available at the transmitter by sending adequate feedback information from the receiver. Under this assumption,...

Ngày tải lên: 22/06/2014, 19:20

... This paper presents radio resource allocation and reallocation algorithms for overlapping MBS Zones. In initialization, the Anchor ASN- GW uses the radio resource allocation algorithm to allocate radio ... Reallocation Random Reallocation One Edge Reallocation Two Edges Reallocation Figure 7: Performance of the radio resource reallocation algorithm. the proposed radio res...

Ngày tải lên: 21/06/2014, 05:20

... available at the transmitter. We now establish an analogous relationship when only partial CSI is available. The imperfect CSI that is available to the BS is modeled as follows. We assume that ... BER was derived. This relationship was used to study the performance of a resource allocation scheme when only partial CSI is available. It is found that the performance varies great...

Ngày tải lên: 21/06/2014, 11:20

... amplification gain of each relay; in the case of DF and EF, the power allocation policy between the two cooperative signals at each relay that is, the parameter ν (q) . Therefore, the relay can be thought ... the amplification gain a r is not always straightforward. In the vast majority of the papers available in the literature, a r is chosen in order to saturate...

Ngày tải lên: 21/06/2014, 11:20

... T wls data and T wls ack are the time that takes to transmit a TCP data and an ACK packet successfully over a wireless link, and are obtained as T wls data = ∞  k=0 kT data ( P data ) k ( 1 −P data ) + ... message has to be transmitted over a wireless link. Furthermore, Balakrishnan et al.’s scheme has another delay component for successful transmission of the next data packe...

Ngày tải lên: 21/06/2014, 20:20

... Vijayaraju, B. E. Rhoades, and R. Mohanraj, A fixed point theorem for a pair of maps satis- fying a general contractive condition of integral type,” International Journal of Mathematics and Mathematical ... of Mathematics, Faculty of Science and Arts, Kirikkale University, 71450 Yahsihan, Kirikkale, Turkey Email address: ishakaltun@yahoo.com Duran T ¨ urko ˘ glu: Department of Mathemati...

Ngày tải lên: 22/06/2014, 19:20

... radios to relay signals for each other and effectively create a virtual antenna array for combating multipath fading in wireless channels. The attractive feature of these techniques is that each ... amplify- and-forward (AF) mode. It is assumed that the relays have statistical channel state information (CSI) of the local source -relay channels, while the destination has full...

Ngày tải lên: 21/06/2014, 19:20

... B Search Ack Ack Search Ack Search Ack Search Search Search Ack Accept Ack & data Setup Data One-hop ad hoc transmission Search SearchSearch Ack Accept Ack & data Setup Data Setup Data Accept Ack ... data Setup Data Setup Data Accept Ack & data Setup Accept Data Ack & data Multi-hop combined transmission Search SearchSearch Ack Accept Ack & data Ack Setup Data Setup Accept...

Ngày tải lên: 21/06/2014, 22:20

... systems. Therefore, it is important to compare the performance corresponding to the NE with an optimal strategy. The mathematical tractability and fact that complete and partial overlaps are not, ... each player allocates equal power at NE for the subcarriers corresponding to a partial overlap. Interestingly, such an initial allocation of power is necessary to achieve a partia...

Ngày tải lên: 21/06/2014, 22:20