Non-orthogonal multiple access (NOMA) as an efficient method of radio resource sharing has its roots in network information theory. For generations wireless communication systems design, orthogonal schemes the time, frequency, or code domain have been main choices due to limited processing capability transceiver hardware, well modest traffic demands both latency and connectivity. However, for next generation systems, given vision connect everything much evolved hardware capability, NOMA...

Today link-to-system (L2S) interfaces are more and used in order to speed up complete system-level simulations. In this paper a simple extension generic incremental redundancy (IR) hybrid automatic repeat request (HARQ) strategies is presented for two well-known L2S interfaces: the exponential effective SNR metric (EESM) mutual information (MIESM). Then we focus on problem of interface tuning, which necessary achieve highest accuracy prediction models. The standard calibration procedure...

We analyze and compare several strategies for iteratively decoding trellis-encoded signals over channels with memory. Soft-in/soft-out extensions of reduced-complexity trellis search algorithms such as delayed decision-feedback sequence estimating (DDFSE) or parallel (PDFD) are used instead conventional BCJR min-log-BCJR algorithms. It has been shown that long channel impulse responses and/or high modulation orders where the algorithm becomes prohibitively complex, proposed offer very good...

In this paper, we consider a generic model of space-time bit-interleaved coded modulation (ST-BICM) on multiple-input multiple-output (MIMO) Rayleigh fading multipath channel. A practical low-complexity receiver structure performing iteratively MIMO data detection, channel decoding and estimation, is presented. The employing reduced-state list-type soft output Viterbi algorithm enables to cope with severe intersymbol interference (ISI) without prefiltering. Among other results, simulations...

In this paper, two semi-analytical performance prediction methods are proposed and compared for multiuser MIMO transmission over block-fading multipath channels iterative MMSE successive interference cancellation based joint decoding. the first method, we develop a completely analytical parameterisation of whole turbo receiver up to users' channel decoders. The method which follows classical framework extrinsic information transfer charts tracks evolution average mutual defined at coded bit...

This paper addresses the issue of advanced equalization methods for space-time communications over multiple-input multiple-output block fading channel with intersymbol interference. Instead resorting to conventional multiuser detection techniques (based on straightforward analogy between antennas and users), we adopt a different point view, separate time from space equalization, thus introducing higher degree freedom in overall equalizer design. Time-domain relies minimum mean-square error...

In this paper, we derive the individual and common symmetric ε-outage achievable rate for relay assisted cooperative communication scheme, coined Non Orthogonal Multiple Access Relay Channel (NOMAMRC), defined as follows: (1) The sources are independent want to communicate with a single destination help of multiple relays; (2) Each is half-duplex apply Selective Decode Forward (SDF) strategy, i.e., it forwards only deterministic function error-free decoded messages; (3) allowed transmit...

We propose a theoretical evaluation of the matched filter bound (MFB) L-branch antenna diversity with maximal-ratio-combining (MRC) in frequency-selective Rayleigh-fading channel. The derivation is based on Karhunen-Loeve expansion. Although many previous approaches this kind have been presented past, we give more general and straightforward one as our model accounts for correlations between L branches channel taps within each branch, well mismatch average received power per branch....

In this paper, we investigate the benefit of joint network-channel distributed coding for multiple-access half-duplex relay channel. contrast with previous work, medium access is not orthogonal and source-to-relay links are error-free, which render reality wireless environments notably complicate problem. Indeed, due to broadcast nature media, transmitted signals interfere at destination form channels. This entails need more sophisticated multiuser detection decoding procedures. Moreover,...

The aim of this paper is to provide a reliable performance evaluation 3GPP Long Term Evolution (LTE) networks. A new kind simulation method, based on drive test measurements live network, used. are combined with link level results for different LTE device categories. Simulation show that all MIMO 2x2 devices have the same in macro-cell environment: average user throughput around 35Mbps, but there still differences depending user's location. Network upgrade 4x4 leads 60% improvement throughput.

In this paper, we study the benefit of Joint Network Channel Coding (JNCC) and Decoding (JNCD) for half-duplex slow fading Multiple-Access Multiple-Relay Channels (MAMRC), defined as follows: (1) Multiple statistically independent sources communicate with a single destination help multiple relays; (2) Each relay is half-duplex; (3) The links between different nodes are subject to additive white Gaussian noise; (4) Some interfere. State Information (CSI) available only at receivers (relays or...

A turbo-detector concept assuring a favorable tradeoff between performance and complexity is investigated for the novel radio access scheme at enhanced data rates GSM evolution (EDGE). The high level modulation employed in EDGE (8-PSK) precludes MAP or MLSE turbo-detection, consequently, computationally efficient sub-optimum solutions have to be considered. based on generic SISO delayed decision-feedback sequence estimator (DDFSE) shown very promising candidate, so long as we couple it with...

Assessing the performance of new technologies before deploying it is key for wireless network operators. It allows making right decision when considering balance between gain that can be expected from technologies, and associated deployment cost. In this paper, we propose a method consists in combining field measurements on LTE live networks, predictions link-level simulations. We then validate with end-to-end carried out different areas category 3 devices. The prediction turns to give...

BeamForming (BF) boosts the spectral efficiency of wireless communication link and energy transmitter. However, in some cases, BF can also create regions highly exposed to Electro-Magnetic Field (EMF). In particular, a near Line-of-Sight (LoS) propagation scenario, power will be intense on best paths between transmitter receiver. To comply with EMF thresholds, must reduce its power, thus degrading quality service. This drawback is typically associated Massive Multiple Input Output (M-MIMO)...

This letter presents a new receiver for Q-ary transmission, where all blocks are embedded in an iterative structure. Packet data transmission Global Systems Mobile communications (GSM) and Enhanced Data rates Evolution (EDGE) considered as examples. A low-complexity soft-in-soft-out detector EDGE is introduced its modification suitable detection derived. Application of channel estimation techniques GSM/EDGE shows significant performance enhancement. Additional improvement may be obtained if...

This paper presents a novel fast performance prediction method for iterative minimum-mean square error interference cancellation based joint decoding in very general multiuser MIMO setting considering transmission over block-fading frequency-selective channels. A Gaussian approximation is made all propagated messages between the outer codes and space-time detector. The relies on signal-to-interference-plus-noise ratio compression, by means of mutual information effective signal-to-noise...

In this paper, we study the individual and common symmetric ϵ-outage achievable rates of various cooperative strategies adapted to slow fading Multiple Access Relay Channel (MAMRC). links are independent subject Rayleigh additive white Gaussian noise. No State Information at Transmitter (CSIT) is available. Common all investigated cooperation schemes following assumptions: (1) The sources want communicate their messages a single destination with help multiple relays using Joint Network...

A novel technique is proposed, which enables each transmitter to acquire global channel state information (CSI) from the sole knowledge of individual received signal power measurements, makes dedicated feedback or inter-transmitter signaling channels unnecessary. To make this possible, we resort a completely new whose key idea exploit transmit levels as symbols embed and observed interference communication transmitters can use exchange coordination information. Although used allows any kind...

Several studies dealing with iterative Linear Minimum Mean Square Error Interference Cancellation (LMMSEIC) algorithms have concluded that better performances are obtained when soft interference cancellation is performed using Log a Posteriori Probability Ratios (LAPPRs) on coded bits rather than Extrinsic (LEXTPRs) bits. While LMMSE-IC can be rigorously derived and analyzed it based LEXTPRs, things become more complicated relies LAPPRs. The aim of this paper twofold: (1) Emphasize the...

This work proposes a new joint link adaptation and HARQ (Hybrid Automatic Repeat Request) scheme for URLLC (Ultra-Reliable Low-Latency Communication) services. We consider the case where transmitter knows only average SNR (Signal-to-Noise Ratio) not instantaneous one. In proposed scheme, optimal maximum number of allowable transmissions MCS (Modulation Coding Scheme) level are determined each packet to maximize spectral efficiency. Our adopted approach exploits channel diversity increases...

In this letter, we present several cooperative incremental redundancy hybrid automatic repeat request strategies for the slow-fading half-duplex time slotted multiple access relay channel. At a given retransmission round, proposed main steps are: 1) destination acknowledges successful decoding of sources via limited feedback control channels; 2) relays inform about result their own forward coordination 3) schedules re-transmission in order to minimize common outage probability system with...

This paper investigates the effect of channel estimation errors in presence spatial correlation for fading MIMO multiple access channels (MACs). Specifically, capacity is derived under notion reliable communication based on average error probability over all errors. Although not necessarily optimality errors, we restrict inputs to be Gaussians, allowing a closed-form expression mutual information, which leads an inner bound region. For different types transmitter information (e.g....

In this paper, a joint channel-network coding is proposed for the multiple access half duplex relay channel. To improve performance, classical constraints of orthogonality between links are partially relaxed, i.e., in first transmission phase two sources allowed to transmit simultaneously, while second phase, transmits alone and silent. order resolve subsequent collisions occurring at destination, related iterative multiuser detection structures suggested. Simulation results demonstrate...

In this paper, we investigate the benefit of joint network-channel (JNC) distributed coding for semi-orthogonal multiple-access half-duplex relay channel. The sources are allowed to transmit simultaneously during listening phase relay, while transmission phase, they constrained remain silent. contrast with previous work, introduce a general framework relaying function, based on selective approach, which depends number correctly decoded messages. We also study conditions where introduced...

In this paper, we investigate the benefit of Joint Network Channel Coding (JNCC) for a new class Multiple Access Relay (MARC), defined as follows: (1) Independent sources communicate with single destination in presence relay; (2) The relay is half-duplex and applies Selective Decode Forward (SDF) strategy, i.e, it forwards only deterministic function error-free decoded messages; (3) are allowed to transmit simultaneously during both listening phase transmission relay. We refer model...