A Distance and Bandwidth Dependent Adaptive Modulation Scheme for THz Communications

In this paper, we provide a novel distance and frequency dependent adaptive modulation scheme, which is suitable for communication systems operating in the terahertz (THz) band. After determining the transmission bandwidth, the proposed scheme evaluates the subcarrier bandwidth of the orthogonal frequency division modulated (OFDM) transmission signal, in order to countermeasure the frequency selectivity of the THz channel. Next, the power is allocated to the OFDM subcarriers and the modulation order of the quadrature modulated (QAM) symbol loaded in each subcarrier is selected, based on the instantaneous channel conditions and a predetermined bit error rate (BER) requirement. The proposed link adaptation algorithm has low computational complexity and can significantly increase the link's throughput.

[1]  Ian F. Akyildiz,et al.  Terahertz band: Next frontier for wireless communications , 2014, Phys. Commun..

[2]  Geoffrey Ye Li,et al.  Terahertz Communications: An Array-of-Subarrays Solution , 2016, IEEE Communications Magazine.

[3]  Carlo Fischione,et al.  Millimeter Wave Cellular Networks: A MAC Layer Perspective , 2015, IEEE Transactions on Communications.

[4]  Alenka G. Zajic,et al.  Statistical Modeling and Simulation of Short-Range Device-to-Device Communication Channels at Sub-THz Frequencies , 2016, IEEE Transactions on Wireless Communications.

[5]  Ian F. Akyildiz,et al.  Distance-aware multi-carrier (DAMC) modulation in Terahertz Band communication , 2014, 2014 IEEE International Conference on Communications (ICC).

[6]  T. Kurner,et al.  Short-Range Ultra-Broadband Terahertz Communications: Concepts and Perspectives , 2007, IEEE Antennas and Propagation Magazine.

[7]  Linglong Dai,et al.  Fast Channel Tracking for Terahertz Beamspace Massive MIMO Systems , 2017, IEEE Transactions on Vehicular Technology.

[8]  Markku J. Juntti,et al.  Performance Evaluation of THz Wireless Systems Operating in 275-400 GHz Band , 2018, 2018 IEEE 87th Vehicular Technology Conference (VTC Spring).

[9]  Ian F. Akyildiz,et al.  Distance-Aware Bandwidth-Adaptive Resource Allocation for Wireless Systems in the Terahertz Band , 2016, IEEE Transactions on Terahertz Science and Technology.

[10]  Geoffrey Ye Li,et al.  Indoor Terahertz Communications: How Many Antenna Arrays Are Needed? , 2015, IEEE Transactions on Wireless Communications.

[11]  Markku Juntti,et al.  Simplified Molecular Absorption Loss Model for 275-400 Gigahertz Frequency Band , 2018 .

[12]  Abbas Jamalipour,et al.  Wireless communications , 2005, GLOBECOM '05. IEEE Global Telecommunications Conference, 2005..

[13]  George K. Karagiannidis,et al.  MIMO Link Adaptation with Carrier Aggregation in LTE-A Heterogeneous Networks , 2015 .

[14]  Ian F. Akyildiz,et al.  Channel Modeling and Capacity Analysis for Electromagnetic Wireless Nanonetworks in the Terahertz Band , 2011, IEEE Transactions on Wireless Communications.

[15]  George K. Karagiannidis,et al.  Inter-band carrier aggregation in heterogeneous networks: Design and assessment , 2014, 2014 11th International Symposium on Wireless Communications Systems (ISWCS).

[16]  Alexandros-Apostolos A. Boulogeorgos,et al.  Interference mitigation techniques in modern wireless communication systems , 2016 .

[17]  Ian F. Akyildiz,et al.  Information capacity of pulse-based Wireless Nanosensor Networks , 2011, 2011 8th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks.

[18]  R. Eskridge,et al.  Improved Magnus form approximation of saturation vapor pressure , 1996 .

[19]  Markku J. Juntti,et al.  Terahertz Technologies to Deliver Optical Network Quality of Experience in Wireless Systems Beyond 5G , 2018, IEEE Communications Magazine.