Throughput Analysis of Companding Peak-to-Average Power Ratio Reduction for OFDM System
Keywords:
PAPR, OFDM, A-law, Mu-LawAbstract
In wireless communication systems, OFDM, has become the predominant modulation technique for high-speed data transfer. The high PAPR of the transmitted signal, which results in ineffective power amplification and spectrum regrowth, is one of its main disadvantages. Companding methods, including μ-law and A-law, have been suggested to address this problem by lowering PAPR by compressing the signal's dynamic range prior to transmission. An extensive throughput analysis of companding strategies for OFDM system PAPR reduction is presented in this paper. We concentrate on the use of A-law and μ-law companding on a 512 sub-carrier OFDM system in particular. We assess the effect of companding on system throughput using comprehensive simulations and theoretical research. First, we look into how signal distortion is affected by the compression properties of the A- and μ-law companding functions. We examine the consequent decrease in PAPR and its effects on system performance by using these companding strategies. Furthermore, we evaluate the trade-offs between throughput improvement and PAPR reduction, taking into account elements like computational complexity, bit error rate (BER) performance, and signal-to-noise ratio (SNR). Additionally, we investigate the connection between companding settings and system throughput, such as quantization level and compression factor. We quantify the attainable throughput improvements with different companding configurations under different channel conditions using in-depth MATLAB simulations. The study's conclusions offer insightful information about how companding strategies for PAPR reduction in OFDM systems can be used in real-world settings. System designers can maximize the performance of OFDM-based communication systems in practical circumstances by knowing the trade-offs between PAPR reduction and throughput increase.
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