Abstract
Energy is a scarce and most vital resource in a wireless sensor network (WSN). Since space-time block coding requires less transmission energy than SISO technique for the same bit error rate (BER), therefore, it is one of the most practical diversity technique for WSN studies. In this work, we have investigated the energy utilization of a simple multiple-input single-output system using STBC for a WSN scenario constituting a number of clusters communication under Rayleigh channels with popular modulation techniques like BPSK and M-QAM. By deriving the rationale expressions for energy utilized per bit metric \((E_{bit})\) in terms of various quantities such as—order of transmit diversity, data rate, BER and the distance between the cluster and the base station (BS) (cluster-BS), we have investigated the suitability of transmit diversity order for varying magnitudes of distances. It has been observed that for communication involving, medium and long cluster to BS distances, the diversity order constituting two transmit antennae results in better energy efficiency and enhances reliability, but, for smaller cluster-BS distances, the contribution is not significant for the case under consideration. Further, we have explored how the energy utilization levels are affected by transmission rates and acceptable error levels. In addition, we optimized the modulation constellation order and recommended best-fit modulation approaches for the varying ranges of cluster-BS distances. Simulation results demonstrate that with increasing cluster-BS distances, the optimized constellation order of the M-QAM modulated communications decreases. BPSK based communication are found to be better in performance for long cluster-BS distances in comparison to those in M-QAM. This work may help the network designers to tailor optimal permutation and combination of various physical layer parameters to facilitate energy-efficient WSN communications.
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I. F. Akyildiz, W. Su, Y. Sankarasubramaniam, and E. Cayirci. Wireless sensor networks: A survey. Comput. Netw., 38(4):393–422, 2002.
A. Sendonaris, E. Erkip, and B. Aazhang. User cooperation diversity. part i. system description. Communications, IEEE Transactions on, 51(11):1927–1938, 2003.
A. Sendonaris, E. Erkip, and B. Aazhang. User cooperation diversity. part ii. implementation aspects and performance analysis. Communications, IEEE Transactions on, 51(11):1939–1948, Nov 2003.
S. Alamouti. A simple transmit diversity technique for wireless communications. Selected Areas in Communications, IEEE Journal on, 16(8):1451–1458, 1998.
Vahid Tarokh, Hamid Jafarkhani, and A.R. Calderbank. Space-time block codes from orthogonal designs. Information Theory, IEEE Transactions on, 45(5):1456–1467, 1999.
F. Ng and X. Li. Cooperative stbc-ofdm transmissions with imperfect synchronization in time and frequency. In Signals, systems and computers, 2005. Conference Record of the Thirty-Ninth Asilomar Conference on, pp. 524–528, 2005.
Xiaohua Li. Energy efficient wireless sensor networks with transmission diversity. Electronics Letters, 39(24):1753–1755, 2003.
J.N. Laneman and Gregory W. Wornell. Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks. Information Theory, IEEE Transactions on, 49(10):2415–2425, 2003.
Shuguang Cui, A.J. Goldsmith, and A. Bahai. Energy-efficiency of mimo and cooperative mimo techniques in sensor networks. Selected Areas in Communications, IEEE Journal on, 22(6):1089–1098, 2004.
Xiaohua Li, Mo Chen, and Wenyu Liu. Application of stbc-encoded cooperative transmissions in wireless sensor networks. Signal Processing Letters, IEEE, 12(2):134–137, 2005.
Z. Huang, T. Yamazato, and M. Katayama. Energy efficiency of cooperative miso technique in multi-hop wireless sensor networks. In Intelligent sensors, sensor networks and information processing, 2008. ISSNIP 2008. International conference on, pp. 511–516, 2008.
Jun Zhang, Li Fei, Qiang Gao, and Xiao-Hong Peng. Energy-efficient multihop cooperative miso transmission with optimal hop distance in wireless ad hoc networks. Wireless Communications, IEEE Transactions on, 10(10):3426–3435, 2011.
Huijiang Li, N. Jaggi, and B. Sikdar. Relay scheduling for cooperative communications in sensor networks with energy harvesting. Wireless Communications, IEEE Transactions on, 10(9):2918–2928, 2011.
Xiaohu Ge, Jinzhong Hu, Cheng-Xiang Wang, Chan-Hyun Youn, Jing Zhang, and Xi Yang. Energy efficiency analysis of miso-ofdm communication systems considering power and capacity constraints. Mob. Netw. Appl., 17(1):29–35, 2012.
D. Zhang and Z. Chen. Energy-efficiency of cooperative communication with guaranteed E2E reliability in WSNs. IJDSN 2013, 2013.
Nischay Bahl, Ajay K. Sharma, and Harsh K. Verma. On the energy utilization for wsn based on bpsk over the generalized-k shadowed fading channel. Wireless Networks, 20(8):2385–2393, 2014.
S. Cui, A.J. Goldsmith, and A. Bahai. Modulation optimization under energy constraints. In Communications, 2003. ICC ’03. IEEE international conference on, vol. 4, pp. 2805–2811, 2003.
J. Proakis and M. Salehi. Digital communications. McGraw-Hill higher education. McGraw-Hill Education, 2007.
A. Paulraj, R. Nabar, and D. Gore. Introduction to Space-Time Wireless Communications. Cambridge University Press, 2003.
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Bahl, N., Sharma, A.K. & Verma, H.K. On the Energy Utilization of WSN Communications Using Space-Time Block Coding Over BPSK and M-QAM Modulations. Int J Wireless Inf Networks 22, 180–187 (2015). https://doi.org/10.1007/s10776-015-0276-x
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DOI: https://doi.org/10.1007/s10776-015-0276-x