Wireless communication systems are tending towards progressive data transfer over a long range of transmission. With the raise in required quality of services, the allocation of the available resource is to be maintained efficiently. A load matrix approach for multi cellular architecture is proposed, which allocate the communication power based on channel estimated SINR. The allocation of power...

In this work, we propose a dynamic buffer-aided distributed space-time coding (DSTC) scheme for cooperative direct-sequence code-division multiple access systems. We first devise a relay selection algorithm that can automatically select the optimum set of relays among both the source-relay phase and the relay-destination phase for DSTC transmission according to the signal-to-interference-plus-n...

This paper 1 shows initialsynchronization techniques including the base station identification (BS ID) for the cellular orthogonal frequency division multiplexing (OFDM) downlink systems. The novel preamble and pilot structures are proposed and simplified three-stage synchronization process is shown. The simulation results indicate that the proposed techniques work well even at low signal-to-in...

We investigate the relative output signal-to-interference-plus-noise ratio (SINR) performance of two linear direct-sequence code-division multiple-access multiuser detectors: the full decorrelator and the partial decorrelator. We derive necessary and sufficient conditions on the system parameters under which the partial decorrelator outperforms the full decorrelator in the output SINR sense. As...

This paper addresses the problem of computing the achievable rates for two (and three) users sharing a same frequency band without coordination and thus interfering with each other. It is thus primarily related to the field of cognitive radio studies as we look for the achievable increase in the spectrum use efficiency. It is also strongly related to the long standing problem of the capacity re...

In this paper, we address the problem of optimal relay placement in a cellular network assuming network densification, with the aim of maximizing cell capacity. In our model, a fraction of radio resources is dedicated to the base-station (BS)/relay nodes (RN) communication. In the remaining resources, BS and RN transmit simultaneously to users. During this phase, the network is densified in the...

In this paper we study medium access control with interference management. We formulate a SINR-based dynamic channel access as a stochastic game in which the players adapt their retransmission scheme based on their own backoff state. We analyze the asymptotics of the system using mean field dynamics. Both stable and unstable behaviors are illustrated.

Signal to Interference and Noise Ratio (SINR) may not be the best scheme for selecting the service access point or base station. Although this SINR-based scheme has higher system throughput and low disconnection probability as compared with other vertical handoff schemes. In this paper we study the performance of SINR scheme and motivate the probability of using other distance based schemes ins...

In an asynchronous DS-CDMA system using random signature sequences and correlation receivers, the signal-to-interference-plus-noise ratio (SINR) at the output of each correlation receiver depends on the shape of the chip waveform employed. The use of double chip waveforms instead of a single chip waveform is investigated, in order to increase the SINR performance. An analytical expression for t...

Improved Phantom cell is a new scenario which has been introduced recently to enhance the capacity of Heterogeneous Networks (HetNets). The main trait of this scenario is that, besides maximizing the total network capacity in both indoor and outdoor environments, it claims to reduce the handover number compared to the conventional scenarios. In this paper, by a comprehensive review of the Impro...