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PEAK-TO-AVERAGE POWER RATIO REDUCTION FOR QAM MODULATION WITH HD RADIO SIGNALS.
PEAK-TO-AVERAGE POWER RATIO REDUCTION FOR QAM MODULATION WITH HD RADIO SIGNALS.
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机译:具有高清无线电信号的QAM调制的峰均功率比降低。
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摘要
A peak-to-average power reduction method includes: (a) quadrature amplitude modulating a signal including a set of subcarriers with a set of data to produce an OFDM modulated symbol vector; (b) limiting the magnitude of the modulated symbol vector to produce a first limited OFDM modulated symbol; (c) demodulating the first limited OFDM modulated symbol to recover distorted QAM constellations; (d) constraining points in the distorted QAM constellations recovered from the first limited OFDM modulated symbol to produce constrained QAM constellations; (e) modulating an OFDM symbol vector with the constrained QAM constellations to produce a modified modulated OFDM symbol; and (f) output the modified modulated OFDM symbol. A transmitter that implements the method is also provided.
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