qhjqhj00 energy-efficiency
Energy-Efficient Beamforming and Cooperative Jamming in IRS-Assisted MISO Networks — Wang et al. (2019) (arXiv:1911.05133, 2019)
What this evaluates
Evaluates the trade-off between energy efficiency and physical-layer security in an IRS-assisted MISO network with cooperative jamming. Probes how varying transmit power constraints and secrecy rate thresholds impact system performance compared to baseline beamforming strategies.
Datasets
- (no dataset; pure metric skill)
Metrics
Energy Efficiency(primary) — range: bits/Hz/Watt- Ratio of achievable secrecy rate to total power consumption (transmit power plus circuit power). Maximized under minimum secrecy rate constraints.
Achievable Secrecy Rate— range: bits/Hz/s- Maximum difference between the legitimate receiver's channel capacity and the worst-case eavesdropper's capacity, subject to power and phase-shift constraints.
Input / output format
Input: Simulation parameters including node coordinates, path loss exponents, channel fading coefficients, maximum transmit power (P_max), secrecy rate threshold (R_th), bandwidth, and circuit power values.
Output: Numerical values or plots of Energy Efficiency and Achievable Secrecy Rate across varying P_max and R_th.
Scoring recipe
def compute_metrics(P_max, R_th, channel_params, power_params):
C_legit = compute_capacity(channel_params['B_U'], P_max)
C_eve = max([compute_capacity(channel_params[f'B_E_{k}'], P_max) for k in K])
secrecy_rate = max(0, C_legit - C_eve)
total_power = P_max + power_params['circuit_power']
ee = secrecy_rate / total_power
return ee, secrecy_rate
Common pitfalls
- Energy efficiency peaks and then decreases as transmit power increases because power consumption grows faster than secrecy rate gains.
- Feasibility breakpoints appear in benchmarks when R_th exceeds the maximum achievable rate even at full power.
- Benchmarks like 'Rate-IRS' maximize secrecy rate without considering power costs, yielding high rates but poor energy efficiency.
Evidence (verbatim from paper)
Fig. 2 shows the energy efficiency versus the maximum transmit power achieved by different designs. The minimum secrecy rate threshold is set as $R_{th} = 0.5$ bits/Hz/s. It can be seen that the energy efficiency achieved by the proposed method is the best among all the benchmark schemes.
Citation
@misc{wang2019energy,
title={Energy-Efficient Beamforming and Cooperative Jamming in IRS-Assisted MISO Networks},
author={Wang et al. (2019)},
year={2019},
note={arXiv:1911.05133}
}
- arXiv: 1911.05133