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05441004
Multiple input multiple output techniques combined
with orthogonal frequency division multiplexing (MIMO-OFDM)
provide a promising approach for wireless systems. However, a
serious drawback of the OFDM system is the high peak-toaverage
power ratio (PAPR), which may severely affect the
power efficiency of RF power amplifiers. In this paper, we
propose a simple method to reduce the PAPR of MIMO-OFDM
signals based on the use of unused subcarriers. Instead of
processing the signals at each transmitter separately, a peak
cancelling signal is generated at one antenna and is then applied
to all the others with only simple modifications. Simulation has
shown that a minimum 2 dB reduction in PAPR can be achieved
for all transmit signals using this approach. As the signal
processing is nearly all done at a single transmitter, repetition of
the operations at each transmitter is avoided, and therefore the
overall cost of the system can be significantly reduced.
- 2011-11-05 01:46:42下载
- 积分：1
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frequency_estimation
QPSK开环载波同步技术研究 频偏估计算法(Open-loop carrier synchronization QPSK Research Frequency Offset Estimation Algorithm)
- 2020-12-11 19:59:18下载
- 积分：1
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HUAWEI_3G_EM770W_EM660
华为3G模块_EM770W_EM660资料和wince驱动(Huawei 3G module _ EM770W_EM660 data and WinCE driver)
- 2012-02-08 19:54:29下载
- 积分：1
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CRC-SEAQ
CRC seaQ资料，内涵peaq国际标准ITU-R Rec.BS-1116-1，对peaq进行设计和规范(RECOMMENDATION ITU-R BS.1116-1*
METHODS FOR THE SUBJECTIVE ASSESSMENT OF SMALL IMPAIRMENTS
IN AUDIO SYSTEMS INCLUDING MULTICHANNEL SOUND SYSTEMS)
- 2013-05-27 14:54:24下载
- 积分：1
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prn_ambig
用matlab写的m序列的模糊函数，运行后生成二维和三维仿真图(using Matlab m-sequences written by the fuzzy function after the operation generated 2D and 3D simulation map)
- 2007-05-22 15:48:26下载
- 积分：1
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pmuyg
采用加权网络中节点强度和权重都是幂率分布的模型，GPS和INS组合导航程序，做视觉测量的上位机代码。( Using weighted model nodes in the network strength and weight are power law distribution, GPS and INS navigation program, Do Vision Measurement PC code.)
- 2017-05-02 12:11:12下载
- 积分：1
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IEC 60870-5-101Transmission protocols
IEC 60870-5-101 通信规约英文版规范(IEC 60870-5-101-2003 Telecontrol equipment and systems Part 5-101 Transmission protocols)
- 2020-06-17 09:20:02下载
- 积分：1
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feng_uj11
音频信号通过LM386放大，包括四元数的各种计算,D-S证据理论数据融合。( LM386 audio signal amplification, Including quaternion various calculations, D-S evidence theory data fusion.)
- 2017-04-25 17:47:26下载
- 积分：1
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KSZ9021GQ
MICREL GIGABIT PHY KSZ9021GQ(I).pdf
- 2009-05-08 12:35:52下载
- 积分：1
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tuoyuanquxian
说明： 关于椭圆算法的，比较通俗易懂，供初学者用(Algorithm on the elliptical, more user-friendly for beginners with)
- 2008-11-24 00:17:52下载
- 积分：1
