17.11 Peak to Average Ratio Both OFDM and CDMA have what is known as high “peak to average ratios” or PAR, on the order 10–20 times, or 10–13 in dB. Every signal has an average power. The “peak to average power” level, usually expressed in dB, is the power level of the ...
PAR:峰值功率与均值功率的比。 crest factor:(波峰因素):波形之峰值除以有效值。 PAR针对功率而言。比如在频谱仪里面测量的显示结果crest factor针对波形(电压)。比如在基带信号处理里面用的CFR (crest factor reduction) 采用PAR还是crest factor,取决于表示或测量的方便而以。 OFDM中,N载波的峰均比最大值是单载波...
1.由于功率的峰均比是电压的峰均比的平方,PAR一般是指功率的峰均比,但也有书上把他当做电压的峰均比来用。 2.如果功率幅值随时间没有变化,即“包络的最大值”与“包络的平均值”处处相等,即“恒包络”信号的峰均比为1或者是0dB。 8楼2022-07-06 03:27 回复 L木-木 3.如果只考虑一个周期的无线...
Young-Hwan You,Hyeok-Koo Jung,Won-Gi Jeon.A Simple Peak-to-Average Power Ratio(PAR) Reduction Scheme for OFDM-CDMA Signals[J].International Journal of Electronics and Communications,2004(58):142-146.A Simple Peak-to-Average Power Ratio(PAR)Reduction Scheme for OFDM-CDMASignals. Young-Hwan ...
The peak-to-average ratio (PAR) of a signal is an important parameter in CDMA systems because it determines the backoff factor that needs to be applied to the power amplifier in order to avoid clipping of the input signal and hence spectral regrowth. In this chapter, we analyze the PAR ...
A new family of generalized raised cosine filters is formulated in an effort to reduce the peak-to-average ratio (PAR) of the baseband signal over that obtained using the conventional raised cosine filter, while maintaining the same excess bandwidth and the zero intersymbol interference condition....
必应词典为您提供peak-to-average-ratio的释义,un. 峰值与平均值比;峰值对平均值比; 网络释义: 峰均比;峰值平均功率比;最大值-平均值比;
aAlthough OFDM enables simple equalization, it is sensitive to carrier frequency offset [2], [7]. The peak to average ratio (PAR) of the transmitted signal power is large [4], [5], [7], [8]. OFDM system performance can be improved by channel coding [1], [6]. 虽然OFDM使能简单的...
We consider a smart power system with distributed users that request their energy demands to an energy provider and the energy provider dynamically updates the energy prices based on the load profiles of the users. The users try to minimize the Peak-to-Average Ratio (PAR) of the power system...
Techniques for performing spectral shaping to achieve a desired peak-to-average ratio (PAR) are described. Spectral shaping may be selectively performed for a single-carrier frequency division multiplexing (SC-FDM) signal based on one or more criteria, e.g., in transmit power limited conditions ...