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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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Semilogy_Plot
说明： intelligent transportation system and internet of vehicles
- 2020-06-24 21:40:01下载
- 积分：1
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UDP
udp协议介绍 是一个无连接的协议，快速等(udp protocol described is a connectionless protocol, fast, etc.)
- 2011-07-30 22:02:17下载
- 积分：1
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Tcha
acquisition tension and frequency of sector
- 2012-08-27 22:57:40下载
- 积分：1
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TUTORIALFORUWNETWORKCODINGUSINGOPNETANDmatlab
使用opnet与matlab实现网络编码，源码在说明文档中有下载地址(Using opnet realize network with matlab coding, source code in the description in the document have Download)
- 2009-11-16 17:27:04下载
- 积分：1
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analysisofIEEE802channel
分析了 IEEE 802.15.4a的信道模型，并分析了现今测距的方法：CHAN与TAYLOR等，并在此基础上做了改进(Analysised the channel of IEEE 802.15.4a,and analysised some methods for TDOA and TOA . )
- 2009-11-27 22:26:07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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ZTEWinCE_V1_2
说明： ZTEWelink Wireless Module Driver User Guide for WinCE-V1.2
- 2019-01-15 09:29:45下载
- 积分：1
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uCOSonTMS320F281x
uC OS_II在DSP芯片TMS320F281x上的移植(OS_II embedded DSP chip in the transplant TMS320F281x)
- 2007-03-12 17:24:53下载
- 积分：1
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ansys-APDL-training
APDL 培训资料，很好的学习ansys的资料(APDL training materials, information on good learning ansys)
- 2011-06-07 22:48:06下载
- 积分：1
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