Data Transmission with Terahertz Communication Systems
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Nowadays, academics are working on wireless communication systems at millimeter wave to provide a high data rate. THz waves are one of the promising systems for wireless communications technology because they provide huge bandwidth,
which is crucial for increasing capacity. Nevertheless, the implementation of a THz
communication system is controlled by various challenges. In this chapter, we work
on some of the issues such as the challenges confronted in the transmitter and receiver
sides.
Atmospheric Attenuation at THz Frequencies in wireless communication systems
is larger than that at microwave frequency band [1]; this problem affects not only
the coverture band, but it decreases the signal power of the communication system,
which influences data rate. For that reason, we propose multiple-input multipleoutput (MIMO) system to increase data rate too. MIMO system is one of the most
promising technologies for providing the high capacity of wireless communication
systems [2–4]. The growing admiration of the MIMO technique calls for a better
understanding to improve the spectrum efficiency of the THz communications system. The basic premise of the MIMO system over single-input single-output (SISO)
is that the theoretically capacity of the MIMO system is higher than for the SISO
system which allows MIMO system to provide a significant gain [5, 6]. The demand
for MIMO technology calls for a better understanding to improve the spectrum efficiency of THz communication system. Furthermore, MIMO systems affect positively
both link reliability and power efficiency. To bring these advantages in practice, we
need to be careful in the exploitation of large spatial dimensions.
To achieve ultra-high-speed THz communication system, authors have mainly
focused on items such as modulation schemes and indoor/outdoor narrowband radio
propagation models. There is still a lack of modulation techniques suitable for positioning applications; also, there is a need to study of propagation effects and THz
hardware components. THz communication systems have a higher bandwidth compared to microwave technology. For that reason, we are mainly focusing on receiver
techniques and MIMO technology to provide a data rate of 100 Gb/s over the THz
communication system. In this work, QPSK and BPSK demodulation with incoherent
and coherent receivers, respectively, are assumed. The performance of QPSK/BPSK
modulation was analyzed for the MRC diversity techniques at the receiver for the
deferent value of the roll-off-factor (α) considered for the RRC filter.
This chapter starts by introducing the concept and relevance of the THz communications system, then by discussing diverse modulation techniques, especially OOK,
QPSK, QAM, MSK, GMSK and the feasibility of the techniques in THz communication system. After that, we represent ALAMOUTI scheme with 2 × 2 diversity
order. We present also the simulation results of MRC receiver in MIMO wireless
channels with Alamouti encoding at THz frequencies.
123
Nowadays, academics are working on wireless communication systems at millimeter wave to provide a high data rate. THz waves are one of the promising systems for wireless communications technology because they provide huge bandwidth,
which is crucial for increasing capacity. Nevertheless, the implementation of a THz
communication system is controlled by various challenges. In this chapter, we work
on some of the issues such as the challenges confronted in the transmitter and receiver
sides.
Atmospheric Attenuation at THz Frequencies in wireless communication systems
is larger than that at microwave frequency band [1]; this problem affects not only
the coverture band, but it decreases the signal power of the communication system,
which influences data rate. For that reason, we propose multiple-input multipleoutput (MIMO) system to increase data rate too. MIMO system is one of the most
promising technologies for providing the high capacity of wireless communication
systems [2–4]. The growing admiration of the MIMO technique calls for a better
understanding to improve the spectrum efficiency of the THz communications system. The basic premise of the MIMO system over single-input single-output (SISO)
is that the theoretically capacity of the MIMO system is higher than for the SISO
system which allows MIMO system to provide a significant gain [5, 6]. The demand
for MIMO technology calls for a better understanding to improve the spectrum efficiency of THz communication system. Furthermore, MIMO systems affect positively
both link reliability and power efficiency. To bring these advantages in practice, we
need to be careful in the exploitation of large spatial dimensions.
To achieve ultra-high-speed THz communication system, authors have mainly
focused on items such as modulation schemes and indoor/outdoor narrowband radio
propagation models. There is still a lack of modulation techniques suitable for positioning applications; also, there is a need to study of propagation effects and THz
hardware components. THz communication systems have a higher bandwidth compared to microwave technology. For that reason, we are mainly focusing on receiver
techniques and MIMO technology to provide a data rate of 100 Gb/s over the THz
communication system. In this work, QPSK and BPSK demodulation with incoherent
and coherent receivers, respectively, are assumed. The performance of QPSK/BPSK
modulation was analyzed for the MRC diversity techniques at the receiver for the
deferent value of the roll-off-factor (α) considered for the RRC filter.
This chapter starts by introducing the concept and relevance of the THz communications system, then by discussing diverse modulation techniques, especially OOK,
QPSK, QAM, MSK, GMSK and the feasibility of the techniques in THz communication system. After that, we represent ALAMOUTI scheme with 2 × 2 diversity
order. We present also the simulation results of MRC receiver in MIMO wireless
channels with Alamouti encoding at THz frequencies.