The complexity and performance of staggered orthogonal frequency division multiplexed (OFDM)data transmission systems are discussed in this paper. As improved digital implemention with a computationalcomplexity reduct...The complexity and performance of staggered orthogonal frequency division multiplexed (OFDM)data transmission systems are discussed in this paper. As improved digital implemention with a computationalcomplexity reduction of 30% compared to previous systems￣[7] is Presented. Staggered OFDM data transmission canprovide high bandwidth efficiency vecy close to 2log_2M for M-ary signalling. For voiceband channels, improve-ment of 3dB and 12dB in Gaussian noise and impulse noise immunities respectively, are abtained over serial QAMtransmission. An analysis of the phase jitter immunsity for the staggered OFDM system with raised cosine shapingfilters is presented. The analysis and simulation results show that a staggered delay of half a baud period betweensubchannels with a 100% rolloff factor optimize the system performance phase jitter and provide an improve-ment of 2dB in phase jitter immunity over nonstaggered systems.展开更多
介绍了微波输能(MPT:Microwave Power Transmission)系统的工作原理和系统组成,指出系统各部分的技术水平。其次,对MPT技术的发展和应用做了全面概述,它主要用于太阳能卫星、临近空间飞行器等远距离输能,目前在低功率应用领域得到关注...介绍了微波输能(MPT:Microwave Power Transmission)系统的工作原理和系统组成,指出系统各部分的技术水平。其次,对MPT技术的发展和应用做了全面概述,它主要用于太阳能卫星、临近空间飞行器等远距离输能,目前在低功率应用领域得到关注。然后对微波无线输能系统的关键技术——整流天线研究进展做了详细分析。最后,讨论了微波输能技术的发展前景和尚待攻破的技术难题。展开更多
文摘The complexity and performance of staggered orthogonal frequency division multiplexed (OFDM)data transmission systems are discussed in this paper. As improved digital implemention with a computationalcomplexity reduction of 30% compared to previous systems￣[7] is Presented. Staggered OFDM data transmission canprovide high bandwidth efficiency vecy close to 2log_2M for M-ary signalling. For voiceband channels, improve-ment of 3dB and 12dB in Gaussian noise and impulse noise immunities respectively, are abtained over serial QAMtransmission. An analysis of the phase jitter immunsity for the staggered OFDM system with raised cosine shapingfilters is presented. The analysis and simulation results show that a staggered delay of half a baud period betweensubchannels with a 100% rolloff factor optimize the system performance phase jitter and provide an improve-ment of 2dB in phase jitter immunity over nonstaggered systems.
文摘介绍了微波输能(MPT:Microwave Power Transmission)系统的工作原理和系统组成,指出系统各部分的技术水平。其次,对MPT技术的发展和应用做了全面概述,它主要用于太阳能卫星、临近空间飞行器等远距离输能,目前在低功率应用领域得到关注。然后对微波无线输能系统的关键技术——整流天线研究进展做了详细分析。最后,讨论了微波输能技术的发展前景和尚待攻破的技术难题。
