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SYSTEM AND METHOD FOR PEAK-TO-AVERAGE POWER RATIO REDUCTION OF OFDM SIGNALS VIA WEIGHTED GRADIENT-BASED ADAPTIVE PEAK CANCELLATION
SYSTEM AND METHOD FOR PEAK-TO-AVERAGE POWER RATIO REDUCTION OF OFDM SIGNALS VIA WEIGHTED GRADIENT-BASED ADAPTIVE PEAK CANCELLATION
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机译:通过基于加权梯度的自适应峰值取消消除OFDM信号的峰均功率比的系统和方法
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摘要
Embodiments include a system, method, and computer program product that receives an Orthogonal Frequency Division Multiplexing (OFDM) symbol, and utilizes a weighted gradient-based adaptive peak cancellation convergence algorithm to create a peak cancellation signal to reduce a peak-to-average power ratio (PAPR) as well as induced error rates of the OFDM symbol. Iterations of the weighted gradient-based adaptive peak cancellation convergence algorithm produce a peak cancellation signal that converges to a desired peak cancellation signal that satisfies a targeted PAPR. Some embodiments utilize a priori knowledge of a power spectral density of clipping noise and pre-defined transmission constraints in the frequency domain to create a peak cancellation signal with specific and desired spectral density properties. For example, some peak reduction tones (PRTs) may be scaled to take advantage of available power resources associated with the pre-defined transmission constraints, where the scaling is specific to each PRT.
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