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Maximum Power Transfer

Maximum Power Transfer

Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...

The Maximum Power Transfer Theorem

The Maximum Power Transfer Theorem

Consider a linear AC Thevenin equivalent circuit connected to a load impedance.
The load connected draws the current, and the circuit delivers the power to the load. The alternating current flowing through the load is determined using the rectangular form of voltages, currents, network impedance, and load impedance. The average power delivered to the load is obtained from the product of the square of current and load resistance.

The Power Superposition Principle

The Power Superposition Principle

Consider a circuit with two sinusoidal voltage sources. Each one influences the circuit independently, and the superposition principle helps us understand the combined effect by adding up the responses from each source.

Maximum Power Flow and Line Loadability

Maximum Power Flow and Line Loadability

The maximum power flow for lossy transmission lines is derived using ABCD parameters in phasor form. These parameters create a matrix relationship between the sending-end and receiving-end voltages and currents, allowing the determination of the receiving-end current. This relationship facilitates calculating the complex power delivered to the receiving end, from which real and reactive power components are derived.

Transmission Line Design Considerations

Transmission Line Design Considerations

Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...

Power Distribution in Three-phase and Single Phase Circuits

Power Distribution in Three-phase and Single Phase Circuits

Power distribution within electrical circuits is a foundational aspect of residential and industrial energy systems. While single-phase power is common in residential settings, three-phase power is the standard for industrial environments with heavy machinery. Each system is different and has advantages, and it's crucial to understand the underlying principles of power distribution and material efficiency.
Single-Phase Power Distribution:
Single-phase circuits are typical in household...

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The Optimal Power Allocation for Sum Rate and Energy Efficiency of Full-Duplex Two-Way Communication Network.

Hengdong Ye¹, Zhengchuan Chen^1,2, Yunjian Jia¹

¹School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China.

Entropy (Basel, Switzerland)

|April 23, 2022

Summary

This study optimizes power allocation for full-duplex two-way (FDTW) wireless systems to boost data rates and energy efficiency. The proposed iterative algorithm effectively enhances performance in both single-carrier and multi-subcarrier OFDM channels.

Keywords:

energy efficiency full-duplex two-way communication power allocation sum data rate

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Area of Science:

Wireless Communication Systems
Signal Processing

Background:

Full-duplex (FD) transmission offers potential for increased data rates in wireless systems.
Self-interference in FD systems presents a significant challenge for energy efficiency.
Optimizing power allocation is crucial for balancing data rate and energy efficiency in FD systems.

Purpose of the Study:

Investigate power allocation in full-duplex two-way (FDTW) OFDM networks.
Enhance both sum data rate and energy efficiency.
Develop algorithms for optimal transmit power allocation.

Main Methods:

Characterization of sum rate and energy efficiency in single-carrier FDTW systems.
Application of fractional programming for energy efficiency maximization.
Development of an iterative algorithm for sub-optimal power allocation in multi-subcarrier FDTW systems.
Combination of iterative algorithm and fractional programming for multi-subcarrier energy efficiency maximization.

Main Results:

Identified optimal transmit power for maximal sum data rate in single-carrier systems.
Achieved significant sum rate improvement using a sub-optimal iterative algorithm in multi-subcarrier systems.
Demonstrated substantial improvements in both sum rate and energy efficiency via the proposed power allocation algorithms.

Conclusions:

The proposed power allocation algorithms effectively improve sum rate and energy efficiency in FDTW OFDM systems.
The iterative algorithm provides a near-optimal solution for transmit power allocation.
The methods are applicable to both single-carrier and multi-subcarrier FDTW communication networks.