Mohammad Irfan

Institut National de la Recherche Scientifique | INRS · Energy, Materials and Telecommunications Research Centre

In the context of orthogonal frequency-division multiplexing with index modulation (OFDM-IM), this paper first presents an improved index modulation (IIM) technique to address the well-known low spectral efficiency problem of IM techniques in general and OFDM-IM in particular. OFDM-IIM is realized by deriving the minimum required number of subcarri...

Spatial modulation (SM) conveys additional information bits via the index of an activated transmit antenna. When the number of antennas is not an integer power of two, the antenna activation becomes challenging. In such a case, only a subset of the available transmit antennas whose cardinality is an integer power of two is used. This leads to anten...

For multiple active spatial modulation (MASM) technique, this letter formulates the minimum number of transmit antennas (N <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</sub> ) and the required number of active RF chains (N <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www...

We present a novel interference free dual-hop cooperative spectrum sharing protocol in cognitive radio networks exploiting spatial modulation (SM) at both primary transmitter (PT) and secondary transmitter (ST). A ST equipped with multi-antenna acts as a half-duplex decode-and-forward relay for the primary system. During phase-1, SM is invoked at P...

In this paper, real-time monitoring of multiple lead-acid batteries based on Internet of things is proposed and evaluated. Our proposed system monitors and stores parameters that provide an indication of the lead acid battery’s acid level, state of charge, voltage, current, and the remaining charge capacity in a real-time scenario. To monitor these...

This paper presents a combination of spatial modulation (SM) and Walsh-Hadamard transform (WHT) for achieving robustness against wireless fading channels. The WHT operation merge together SM transmitting symbols, where the number of symbols depends on the order of WHT matrix. A WHT matrix of order two merges two transmitting symbols by their sum an...

This paper addresses the issues related with conventional near–far user pairing in non-orthogonal multiple access. Performance effects of near–far pairing on regions with negligible channel gain differences between users are investigated. These regions occur when pairing is performed between cell center and cell edge users, thus leaving the cell mi...

This paper addresses the issues related with conventional near-far user pairing in downlink non-orthogonal multiple access (NOMA). Performance effects of near-far pairing on regions with negligible channel gain differences between users is investigated. These regions occur when pairing is performed between cell center and cell edge users, thus leav...

In this paper, we proposed Archimedean spiral for UAV trajectory to localization position of military vehicle in tactical wireless networks. In our scenario, the vehicle called cluster head (CH), which is correspond to tank or humvee deploy randomly at Battlefield. Furthermore, Time differential of arrival (TDOA) technique is used for the communica...

Non-orthogonal multiple access (NOMA) is a promising candidate for future radio networks, as it effectively utilizes frequency and time resources and has higher spectral efficiency. In this problem we address a problem in NOMA based communication systems when both the users has the same channel gain, in which case NOMA performance degrades consider...

Non-orthogonal multiple access (NOMA) is a promising candidate for 5G networks. NOMA achieves superior spectral efficiency than conventional orthogonal multiple access (OMA), as in NOMA multiple users uses the same time and frequency resources. Multiple-input-multiple-output (MIMO) is one another promising technique that can enhance system performa...

Inthispaper,wepresentanewhybridmodulationschemebasedonquadratureamplitudemodulation (QAM) and the idea behind frequency shift keying (FSK) for multicarrier communication systems. The proposed scheme is a request based modulation scheme where the QAM modulated message signal bits are encoded to different subcarriers based on the message signal bits....

In this paper, we present a new hybrid modulation scheme based on quadrature amplitude modulation (QAM) and the idea behind frequency shift keying (FSK) for multicarrier systems. The proposed scheme is a request based modulation scheme where the QAM modulated message signal bits are encoded to different subcarriers based on the message signal bits....

Single Carrier Frequency Division Multiple Access (SC-FDMA) is a multiple access scheme that uses DFT spreading prior to OFDM modulation to map the signal from each user to a subset of the available subcarriers. That has similar performance and almost the same overall structure as those of an OFDMA system. Its advantage over OFDMA is that the SC-FD...