The first item of Eq. (9) represents the energy consumption for reception of the polling frame of N sub-nodes.
where ε R D P represents the power consumption of the packet reception, ε T DACK is the power consumption in the transmission of acknowledgment message, and ε R D B represents the power consumption of the preamble reception.
where L is the length of the packet, R is the coding rate, k is the overhead energy consumption of transmission and reception operations of one packet.
The primary energy consumption of each transmission or reception is approximate to the same basic energy unit Eb.
In the above expressions, P filr RS and P LNA RTS are the power consumption of the active filters (reception) and the low-noise amplifier (LNA), respectively.
Because the energy consumption of packet transmission and reception is calculated in the equation before, ( {psi}_T^L ) and ( {psi}_R^L ) should be subtracted from the calculation for ( {E}_{mathrm{LPL}}^L ).
E i is the residual energy of node i at the end of time slot τ, P EH,i is the harvested energy of node i during slot τ, I is the binary indicator function and a i (j) is the event that node i receives and transmits packets, and E TX, E RX just represent the energy consumption of data transmission and reception.
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The total reception power consumption of node i is the sum of all power consumed to receive data from other nodes, as formulated below, where λ is a constant coefficient: {P}_{ri=}{displaystyle sum lambda cdot {r}_{ki}.} (7).
The energy consumption of the payload for transmission and reception is 97.5 and 73.5 μ J, respectively.
The core module of the DFE-Rx, the synchronization engine, has been measured at 1.2 V and reports an average power consumption of 1.9 mW during Wireless Local Area Network (WLAN) reception and 1.6 mW during configuration, while running at 10 MHz.
