This paper studies a novel Radar and wireless communication fusion system namely, RadCom, using orthogonal frequency division multiplexing index modulation waveforms. From the perspective, information is conveyed not only through modulated subcarriers but also by active subcarrier indices that are dynamically updated at transmitted symbol rates. When compared with conventional systems, subset o...

The performance of Low-Density Parity-Check (LDPC)-coded Orthogonal Frequency Division Multiplexing (OFDM) is investigated over turbulence channels in underwater wireless optical communications (UWOC). relation between the bit error ratio (BER) and parameters such as scintillation coefficient, signal-to-noise (SNR), length LDPC code, order OFDM quantified by simulation. Results show that while ...

In this paper, it is proposed to enhance coherent optical orthogonal frequency-division multiplexing (OFDM) system by using index modulation in terms of bit error rate (BER) and spectral efficiency for different levels the fiber nonlinearity. OFDM with (CO-OFDM-IM), information conveyed not only through activated subcarriers but also indices active subcarrier that are dynamically updated at tra...

In this paper, we investigate the information-theoretic secrecy performance of recent precoded faster-than-Nyquist signaling (FTN) with aid optimal power allocation in eigenspace. More specifically, rate and outage probability a fading wiretap channel, which was derived for classical Nyquist-based orthogonal transmission, is extended to those our eigendecompsition-based FTN (E-FTN) quasi-static...

iii Preface I would like to thank my supervisor Dr. Jörgen Carlsson, Professor Hakan Pettersson and Dr. Lars Landin for their precious time and help. I am extremely glad that they made it possible for me to have such a high level education. I would like to thank Emil Nilsson for his continuous help even he was so busy. My thanks to Eva Strid Andersson for her support whenever I need. iv Abstrac...

An orthogonal frequency-division multiplexing (OFDM) waveform enables simultaneous radar sensing and communications. In the multiple-input multiple-output (MIMO) case with several transmit (Tx) antennas, signals is usually implemented using equidistant subcarrier interleaving (ESI), thus allowing separation of in frequency domain. this work, a technique denoted as range-division (RDMult) analyz...

The experimental demonstration of MOSAIC, a reconfigurable WDM add/drop network with subcarrier multiplexed control, is presented. The MOSAIC network implements the optical layer protocol to support bit-rate transparent multichannel lightpaths. Two types of add/drop multiplexers are implemented and combined in a three-node experiment. Multihop lightpaths are established giving an end-to-end bit...

We report the transmission of 40 quantum-key channels using WDM/SCM-QKD technology and 4 bidirectional classical channels over a PON. To our knowledge the highest number of quantum key channels simultaneously transmitted that has ever been reported. The quantum signal coexists with classical reference channel which is employed to process the qbits, but it has enough low power to avoid Raman cro...

High-order modulation formats with high symbol rates are promising candidates for meeting the growing traffic requirements of digital coherent transmission. In using these formats, impact transceiver impairment on signal quality becomes significant. this paper, we propose an 8×2 widely linear (WL) multiple-input multiple-output (MIMO) equalizer independent complex filtering IQ signals to mitiga...