In this paper, we investigate the random access (RA) problem in a massive MIMO scenario. To deal with continuous increase number of users, and difficulty associated sharing pilots among such users order to organize channel access, strongest-user collision resolution (SUCRe) protocol is modified include non-orthogonal multiple (NOMA) approach. The proposed NOMA-RA allows resolve collisions betwe...

Rate splitting multiple access (RSMA), a recent generalization and merging of spatial division (SDMA) superposition coding has exponential complexity. Hierarchical streams that transmit subset possible encoded messages are proposed for rate analyzed. To reduce precoding complexity, RSMA with interference nulling (RSMA-IN), nulls the portion is not decoded investigated by formulating sum maximiz...

State Sstimation over Fading Channels: Outage and Diversity Effects Kimmo Kansanen Department of Electronic and Telecommunications, Norwegian University of Science and Technology (NTNU), Norway Uncoded (analog) transmission of a scalar first-order Gauss-Markov process over fading channels is considered. This model is applicable in real-time applications and for settings such as wireless sensor ...

We compute the exact rate sum of a symmetric Gaussian interference channel for the HanKobayashi region with Gaussian signaling for a subset of parameters in the weak interference regime. In this subset we identify three regimes of operation: an initial set where treating interference as noise is optimal, an intermediate regime where one employs a time-sharing strategy (with power control) betwe...

Abstract—An effort has been made to illustrate the performance comparison of the Rayleigh and Rician fading channel models by using MATLAB simulation in terms of Sum rate and signal to noise ratio (SNR). We have developed algorithms for the Rayleigh and Rician fading channels, which computes the Sum rate for the primary and the secondary user. Cognitive radio is regarded as one the most promisi...

Multiple-Input-Multiple-Output (MIMO) is one of the most important communication techniques that allow wireless systems to achieve higher data rate. To overcome the practical difficulties in implementing Dirty Paper Coding (DPC), various suboptimal MIMO Broadcast (MIMO-BC) scheduling algorithms are employed which choose the best set of users among all the users. In this paper we discuss such a ...

In an M × N interference network, there are M transmitters and N receivers with each transmitter having independent messages for each of the 2 −1 possible non-empty subsets of the receivers. We consider the 2 × 2 interference network with 6 possible messages, of which the 2 × 2 interference channel and X channel are special cases obtained by using only 2 and 4 messages respectively. Starting fr...