Energy Optimization for Reliable Point-to-Point Communication in Energy-Constrained Networks

Costa, Felipe M.; Ochiai, Hideki

doi:10.1109/vetecs.2010.5494242

Cited by 11 publications

(7 citation statements)

References 6 publications

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“…This work extends our previous work [4,5], through the investigation of a more practical scenario: pulse shaping filters for MQAM and MPSK, various power consumptions of RF circuits, and the data rate requirement as well as bandwidth limitations of IEEE 802.15.4 standard are considered. The objective is to derive the optimum parameters for reaching energy minimization and to compare the overall performances of MQAM, MPSK, and noncoherent MFSK modulation schemes.…”

Section: Introductionmentioning

confidence: 59%

“…In our previous work [4,5], based on the relations between capacity (and cutoff rate) and SNR of MQAM, MPSK, and noncoherent MFSK, the optimum transmission scheme (constellation size and information rate) that results in minimum energy was derived for distances up to one hundred meters between WSN nodes. In [5], a comparison among the three cited modulation schemes was performed.…”

Section: Introductionmentioning

confidence: 99%

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Energy-Efficient Physical Layer Design for Wireless Sensor Network Links

Costa¹,

Ochiai

2011

2011 IEEE International Conference on Communications (ICC)

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We study the energy consumption of wireless sensor network links applying three widely used digital modulation schemes, i.e. MQAM, MPSK, and noncoherent MFSK. For MQAM and MPSK, pulse shaping is considered. Both transmitted signal power and circuit power are taken into account where the former is modeled using the relationship between cutoff rate and signal-to-noise ratio (SNR) and the latter is modeled considering the power consumption of typical hardware used in wireless sensor nodes. For each modulation type, the optimum parameters for minimizing the energy per information bit are derived. Moreover, a comparison among the three modulation types is presented. I. INTRODUCTIONEnergy efficient schemes are of paramount importance for wireless sensor networks (WSN) composed of battery-powered nodes, where energy efficiency directly affects the lifetime of the network.Energy consumption in energy-constrained networks has already been addressed in the literature. For example, Cui et al.[1] analyzed both transmission time and constellation size optimization for MQAM and MFSK modulations (both coded and uncoded), considering both transmission and circuit energy consumption. It has been shown that optimizing transmission time or, equivalently, constellation size, minimizes the total energy used for transmission of information.In [2], the energy performances of uncoded MPSK, MQAM, and MFSK modulations in both AWGN and Rayleigh fading channels were evaluated and compared for very short-range (less than 10 meters) communication. It has been concluded that MQAM is more energy-efficient than the other modulation schemes in this case.More recently, the combination of Reed-Solomon codes with MPSK, MQAM, and MFSK modulations has been studied in [3], where an optimum pair of coding and modulation were derived by computing required energy per bit.In our previous work [4,5], based on the relations between capacity (and cutoff rate) and SNR of MQAM, MPSK, and noncoherent MFSK, the optimum transmission scheme (constellation size and information rate) that results in minimum energy was derived for distances up to one hundred meters between WSN nodes. In [5], a comparison among the three cited modulation schemes was performed. A fixed circuit power consumption model developed in [1] was used.

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Section: Introductionmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Energy-Efficient Physical Layer Design for Wireless Sensor Network Links

Costa¹,

Ochiai

2011

2011 IEEE International Conference on Communications (ICC)

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“…This paper extends the work of [4] by considering more practical scenario; we consider three different modulation types frequently employed in wireless communications; MQAM, MPSK, and MFSK, and derive an energy minimization scheme for point-to-point wireless communications. Among these three modulation types, MFSK has been a preferable choice for WSNs due to its constant peak-to-average power ratio of the transmit signal and low complexity that allows the use of noncoherent detection at the receiver.…”

Section: Introductionmentioning

confidence: 85%

“…Minimization of energy for MQAM was previously studied in [4]. The function to be minimized was given in (12).…”

Section: A Mqammentioning

confidence: 99%

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A Comparison of Modulations for Energy Optimization in Wireless Sensor Network Links

Costa

Ochiai

2010

2010 IEEE Global Telecommunications Conference GLOBECOM 2010

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We study the energy consumption of individual links in wireless sensor networks (WSN). Three widely used digital modulation schemes, i.e. MQAM, MPSK, and MFSK, are analyzed and compared. Both transmitted signal power and circuit power consumptions are considered. For modeling the signal power, we use the relation between channel capacity or cutoff rate and signal to noise ratio (SNR). By numerical calculation, we find the optimized parameters for minimizing the energy consumption per information bit in a point-to-point wireless link.

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