[PDF] Top 20 Dynamic Subcarrier Allocation for Real Time Traffic over Multiuser OFDM Systems

... The average delay is the mean of the delay of all packets not dropped. For each successfully delivered packet, the delay is calculated as the difference between the departure and arrival times. In DSA-RT, packets which ... See full document

... Resource allocation for multiuser OFDM networks has attracted a lot of interest [15], The goal is to jointly allocate subcarriers, rate and power in order to maximize (respectively minimize) the ... See full document

... OFDMA systems can be improved by allocating radio resources ...resource allocation schemes: 1) fixed resource allocation [4]; and 2) Adaptive or dynamic resource allocation ...resource ... See full document

... resource allocation for OFDM-based CR networks has attracted much attention ...power allocation schemes were proposed to maximize the sum capacity of the CR system under the interference constraints ... See full document

... sub-carrier allocation, and rate ...communication systems due to the scarcity of the former, time varying channel conditions, and heterogeneous classes of traffics and very diverse QoS requirements ... See full document

... shows subcarrier selection procedure for each ...same time user 1 has the worst conditions in the channel and the lowest MC ...data traffic [9]. In the second phase NRT data traffic is joined ... See full document

... For PM strategy, the goal would be to minimize the modu- lation on each subcarrier and, as a consequence, the number of subcarriers is increased to support the rate requirement. Whereas for BCPM strategy, the aim ... See full document

... multicarrier systems can be enhanced by the water filling strategy, in which different rates and powers are allocated to ...each subcarrier per ...resource allocation problems in multi-carrier ... See full document

... power allocation optimization problem for cogni- tive user and cognitive relay is considered ...joint subcarrier and power allocation algorithm for coopera- tive multiuser orthogonal frequency ... See full document

... complexity dynamic subcarrier and power allocation methodology for downlink communication in an OFDM-based multiuser environment is ...Adaptive Multiuser OFDM, ... See full document

... From this graph we have observed that the transmission bit rate is increased and power consumption reduced by increasing the levels of QAM modulation techniques as 64-QAM, 128-QAM and 256- QAM modulations. In each level ... See full document

... in OFDM relaying SWIPT systems ...models, time switching (TS) model and power switching (PS) model were put for- ward in [13–15], ...SWIPT systems including two- user MIMO broadcast channels, ... See full document

... a real time information display unit which helps in providing passengers with the necessary information related to their ...expected time to reach the destination or the nearest metro station ... See full document

... transmitted over a radio channel, even in multipath ...and time synchronization of the carriers are chosen in such a way that the carriers are orthogonal, meaning that they do not cause interference to each ... See full document

... power allocation schemes for AF multi-user system using different objectives such as maximizing the minimum rate, maximizing the sum rate, and minimizing the total power consumption with a constrained minimum ... See full document

... using OFDM communication ...addition, OFDM can greatly improve the spectral efficiency [6] [7], which is very suitable for the narrow bandwidth of seawater electromagnetic ... See full document

... bandwidth overhead, which is a particularly exploitable feature in optical fibre systems. For example, certain short distance applications such as local area networks (LANs), may use multi-mode or singlemode fibre ... See full document

... the USSCH/SDMA-OFDM system was capable of achieving a sig- nificantly better performance in comparison to the other systems, as shown in Figure 5. More precisely, the conventional and the RSFH or RSSCH ... See full document

... practical OFDM systems, the number of available subcarriers is usually smaller than the discrete Fourier transform (DFT) size [3], ...cellular systems [3], all available subcarriers are allocated to ... See full document

... one OFDM symbol, but they are faded at the beginning of each OFDM ...communicating over the three- path SWATM CIR given on page 78 of [1], assuming that the channels’ transfer functions are perfectly ... See full document