Minimizing Bit-Error-Rate by Optimizing Power Amplifier's Output Power in Wireless Links

This paper presents a comprehensive analysis of the impact of a generic power amplifier's (PA's) output power on the bit-error-rate (BER) in a transceiver employing a 4 M quadrature amplitude modulation (QAM) scheme. The study highlights the dual effects of excessive and insufficient outpu...

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Bibliographic Details
Published inIEEE International Symposium on Circuits and Systems proceedings pp. 1 - 5
Main Authors Chae, Seungwoo, Oveisi, Mohammad, Heydari, Payam
Format Conference Proceeding
LanguageEnglish
Published IEEE 25.05.2025
Subjects
Analytical models
Bit-error rate (BER)
Hands
power amplifier (PA)
Power amplifiers
Power generation
Quadrature amplitude modulation
quadrature-amplitude modulation (QAM)
Signal to noise ratio
System performance
Transceivers
Visualization
Wireless communication
Online AccessGet full text
ISSN2158-1525
DOI10.1109/ISCAS56072.2025.11043581

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Summary:This paper presents a comprehensive analysis of the impact of a generic power amplifier's (PA's) output power on the bit-error-rate (BER) in a transceiver employing a 4 M quadrature amplitude modulation (QAM) scheme. The study highlights the dual effects of excessive and insufficient output power on system performance. On one hand, low output power reduces the signal-to-noise ratio (SNR) at the receiver, leading to increased BER. On the other hand, high output power pushes the PA into its nonlinear region, similarly degrading BER. A quantitative analysis is conducted to examine the combined influence of noise and nonlinearity on BER. From this analysis, the globally optimal PA output power that minimizes BER for a wireless system is derived. Theoretical insights are validated through system-level simulations, demonstrating the effectiveness and high accuracy of analytical expressions.
ISSN:2158-1525
DOI:10.1109/ISCAS56072.2025.11043581