Table 1 List of abbreviations
From: Efficient energy resource utilization in a wireless sensor system for monitoring water quality
ADC | Analog-to-digital converter | mc, a; gc, b | Class A channel power gain for UL channels; class B channel power gain for UL channels |
|---|---|---|---|
BS / c1 | Base station | nc, a; uc, b | Class A channel power gain for DL channels; class B channel power gain for DL channels |
CSI | Channel state information | Γ | SNR gap |
DL | Downlink | σ 2 | Noise power |
EH | Energy harvesting | jc; ξ0 | Time-length of class A energy harvesting; time-length of class B energy harvesting |
IPS | Intended RF power sources | ζa; ξb | Time-length of class A information transmission; time-length of class B information transmission |
IoT | Internet-of-Things | xc, a; xc, b | Power signal received by senor a; Power signal received by senor b |
ISM | Industrial, scientific and medical | za; zb | Background noise at sensor a; Background noise at sensor b |
MCMIS | Multi-class, multiple-intended-source | Ea; Eb | Total energy received by sensor a; total energy received by sensor b |
OAERA | Optimization algorithm for efficient resource allocation | jc; ξ0 | Time-length of class A energy harvesting; time-length of class B energy harvesting |
QoS | Quality-of-service | ζa; ξb | Time-length of class A information transmission; time-length of class B information transmission |
RF | Radio frequency | za; zb | Background noise at sensor a; Background noise at sensor b |
TDMA | Time division multiple access | Ea; Eb | Total energy received by sensor a; total energy received by sensor b |
UL | Uplink | εa; εb | RF-to-DC conversion efficiency |
WIPT | Wireless energy transmission and wireless information transmission | Pa; Pb | Average energy consumed by sensor a for data transmission; average energy consumed by sensor b for data transmission |
WSNs | Wireless sensor network | Ψa; Ψb | Fixed allowable portion of energy for sensor a data transmission; fixed allowable portion of energy for sensor b data transmission |
WPSN | Wireless powered sensor network | \( {x}_{c_1,a} \);\( {x}_{c_1,b} \) | Signal received by the BS from sensor a; signal received by the BS from sensor b |
a ∈ {a1, a2, .., A}; b ∈ {b1, b2, .., B} | Set of sensor nodes in class A; set of sensor nodes in class B | xa; xb | Sensor a arbitrary random signal; sensor b arbitrary random signal |
c ∈ {c1, c2, .., C} | Set of intended RF power sources | εa; εb | RF-to-DC conversion efficiency |
\( {\overset{\sim }{m}}_{c,a} \); \( {\overset{\sim }{g}}_{c,b} \) | Complex variable of class A UL channels from sensor a to the BS; complex variable of class B UL channels from sensor b to the BS | Pa; Pb | Average energy consumed by sensor a for data transmission; average energy consumed by sensor b for data transmission |
\( {\overset{\sim }{n}}_{c,a} \); \( {\overset{\sim }{u}}_{c,b} \) | Complex variable of class A DL channels from an IPS c to sensors a; complex variable of class B DL channels from an IPS c to sensors b | Ψa; Ψb | Fixed allowable portion of energy for sensor a data transmission; fixed allowable portion of energy for sensor b data transmission |
xc, a; xc, b | Power signal received by senor a; power signal received by senor b | E.coli | Escherichia coli |
pH | Potential of hydrogen (in logarithmic scale standard) |