-
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
-
Cluster-Head-Selection-using-a-Two-Level-Fuzzy-Lo
Cluster Head Selection using a Two-Level Fuzzy Logic in Wireless Sensor Networks
- 2012-12-06 17:09:30下载
- 积分：1
-
4GMobile
At the beginning of 2004, the standards for third
generation (3G) cellular technology were embodied in 483
Technical Specifications published by the two Partnership
Projects: 3GPP and 3GPP2.
- 2010-09-22 18:12:28下载
- 积分：1
-
to2to
二进制格雷码与自然二进制码的互换
它就是介绍怎么把二进制格雷码与自然二进制码的互换。主要是异或操作(itis to for 2to 2)
- 2011-10-21 18:42:17下载
- 积分：1
-
stghj
人脸识别中的光照处理方法，用MATLAB编写的遗传算法路径规划，空间目标识别，采用PM算法。( Face Recognition light treatment method, Genetic algorithms using MATLAB path planning, Space target recognition algorithm using PM.)
- 2017-04-21 18:02:01下载
- 积分：1
-
Soundsourcelocalizationforobotauditorysystemusingt
基于互相关函数，采用求和广义互相关函数(summed-GCC)法用于机器人系统平台。由于采用不同的映射函数(mapping functions)，GCC法在该平台下，只需三个麦克风即可进行三维定位，突破了基于TDOA法进行三维声源定位最少需4个麦克风的限制(Based on cross-correlation function, using generalized cross-correlation function sum (summed-GCC) method for the robot system platform. Because of using different mapping function (mapping functions), GCC method in the platform, the only three to three-dimensional microphone positioning, a breakthrough TDOA method based on three-dimensional sound localization will take at least four microphone restrictions)
- 2009-03-06 09:30:59下载
- 积分：1
-
the-design-of-MVB-and-ethenet
有关MVB与工业以太网网关的设计与研究，对列车通信网络感兴趣的朋友可以看看(MVB and industrial Ethernet gateway for the design and research on the train communication network interested friends can see)
- 2011-10-31 18:23:49下载
- 积分：1
-
LTE
一本介绍第四代移动通信LTE的英文书籍，详细介绍了从发送端到信道到接收端的原理及实现。(One introduces fourth-generation LTE mobile communication in English books, details from the sender to the receiver channel to the principles and implementation.)
- 2011-06-22 21:22:23下载
- 积分：1
-
optisystem7
optisystem7入门中文讲义（网络版）以及Demo(Introduction to Chinese optisystem7 notes (Online))
- 2011-10-20 09:39:47下载
- 积分：1
-
HCF-spec160-(Device-Families-Command-Specificatio
HART Communication Foundation - Device Families Command Specification
- 2020-11-20 14:39:37下载
- 积分：1
