LTE and LTE-Advance communication are based on the uplink reference signals to estimate the channel characteristics. A split transmission of sounding and demodulation signaling will cause many constraints; such as layers and reference signal symbols interferences, increase in delay and reduction in the overall throughput of the LTE uplink transmission. In this paper, we propose an energy effici...

License Assisted Access (LAA) LTE (LTE-LAA) is a new type of LTE that aggregates the licensed LTE bands with the unlicensed bands via carrier aggregation. To operate in unlicensed bands, LTE-LAA adopts the listen-before-talk policy and designs its channel access mechanism similar to WLAN’s DCF. In this paper, we consider an LAA network consisting of an LTE-LAA eNB coexisting with a Wi-Fi STA, a...

Executive Summary Spectrum, the single most important resource for telecommunication voice and mobile broadband service, is finite and limited. As subscribers demand faster and increased capacity anytime, anywhere, operators face the challenge of maximizing all available spectrum assets – FDD or TDD. In previous 3GPP standards, mobile operators have deployed Frequency Division Duplex (FDD) tech...

An LTE User Equipment (UE) can only be scheduled for uplink transmission if its uplink transmission timing is synchronized. The LTE Random Access Channel (RACH), therefore, plays a key role as an interface between nonsynchronized UEs and the orthogonal transmission scheme of the LTE uplink radio access.

In this paper, we study a class of kinetic equations describing radiative transfer in gases which include also the interaction molecules gas with themselves. We discuss several scaling limits and introduce some Euler-like systems coupled radiation as an aftermath specific limits. consider local thermodynamic equilibrium (LTE) holds, well situations assumption fails (non-LTE). The structure gas-...

This paper is concerned with the analysis of adjacent channel interference of the Long Term Evolution (LTE) mobile system operating in the Digital Dividend into Digital Video Broadcasting – Terrestrial (DVB–T) system. Field measurements in the real LTE network have been conducted in order to define the most significant scenarios and for each of these, Protection Ratios have been quantified. Var...

In this paper, a Bit Error Rate (BER) analysis is presented for Multiple-Input Multiple-Output (MIMO) schemes in the 3GPP Long Term Evolution (LTE) system. Analytical expressions for the average BER of the system are derived over flat Rayleigh fading channels for two different MIMO schemes as defined in LTE, assuming M-ary quadrature amplitude modulation (M-QAM) schemes and are evaluated numeri...

MIMO-OFDM technology joins together the focal point of MIMO and OFDM and is generally utilized as a part of high information rate frameworks. Conventional channel estimation of MIMO-OFDM experiences a high cost of huge number of pilots. Channel estimation is discriminating to collector execution in the long term evolution (LTE) system. Reference signs are scattered with information indicators a...

This paper presents an overview of radio interface technologies for cooperative transmission in 3GPP LTE-Advanced, i.e., coordinated multi-point (CoMP) transmission, enhanced inter-cell interference coordination (eICIC) for heterogeneous deployments, and relay transmission techniques. This paper covers not only the technical components in the 3GPP specifications that have already been released,...