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Underwater_Comm

于 2020-04-13 发布

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下载积分: 1 下载次数: 8

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代码说明：

说明：传输ofdm数据，采用了简单的多径信道，实现水下通信，整体程序还可以，可以参考参考(In order to transmit OFDM data, a simple multi-path channel is used to realize underwater communication. The overall program can also be used for reference)

文件列表：

UnderwaterAcoustic, 0 , 2020-04-13
UnderwaterAcoustic\apply_simple_multipath.m, 1490 , 2020-04-13
UnderwaterAcoustic\decode_ofdm.m, 1569 , 2016-11-11
UnderwaterAcoustic\decode_ofdm2.m, 1572 , 2016-11-11
UnderwaterAcoustic\do_tx_rx.m, 1172 , 2016-11-11
UnderwaterAcoustic\encode_ofdm.m, 1992 , 2016-11-11
UnderwaterAcoustic\encode_ofdm2.m, 1995 , 2016-11-11
UnderwaterAcoustic\img2qpsk.m, 529 , 2016-11-11
UnderwaterAcoustic\img2qpsk_ofdm.m, 906 , 2016-11-11
UnderwaterAcoustic\lena.gif, 69732 , 2016-11-11
UnderwaterAcoustic\ofdm_txrx_gui.fig, 8185 , 2016-11-11
UnderwaterAcoustic\ofdm_txrx_gui.m, 6873 , 2016-11-11
UnderwaterAcoustic\simple_gui.fig, 5155 , 2016-11-11
UnderwaterAcoustic\simple_gui.m, 5782 , 2016-11-11
UnderwaterAcoustic\test_ofdm_txrx.m, 819 , 2016-11-11
UnderwaterAcoustic\turtle.gif, 60005 , 2016-11-11
UnderwaterAcoustic\turtle.jpg, 97171 , 2016-11-11
UnderwaterAcoustic\underwater.gif, 41813 , 2016-11-11
UnderwaterAcoustic\underwater.jpg, 94466 , 2016-11-11

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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
Code
STM8S - for new member

2017-09-24 16:45:43下载

积分：1
RIL_whitepaper_MS_Intrinsyc_June2004
微软RIL白皮书。介绍了微软RIL(Radio Interface Layer)的架构和开发所必须具备的知识，包括简介、RIL Modem接口、开发环境、平台实现、测试，以及相关信息(Microsoft White Paper RIL. It introduced Microsoft RIL (Radio Interface Layer) architecture and the necessary knowledge for developer, including the Introduction, RIL Modem interface, development environment, platform, testing, and related information)

2009-07-12 12:09:38下载

积分：1
Modbus-function-code_and-format
modbus 详细解说，协议文档。。。,包括了function。。。(modbus detailed explanation of the protocol documentation. . .)

2013-08-14 09:47:49下载

积分：1
194947
说明：用TCP获得网路标准时间来设定您的PC时钟(Set your PC clock with TCP to get network standard time)

2018-12-31 15:05:46下载

积分：1
423132
OFDM channel estimation DFT single document, ultra-detailed, very helpful for understanding OFDM, but also helpful for understanding how to simulate channel estimation

2019-03-26 19:22:38下载

积分：1
4
说明： document qpsk vhdl code

2018-01-06 09:27:04下载

积分：1
Chow
MIMO-OFDM系统中的自适应算法中的一种。Chow算法是根据各个子信道的信道容量来分配比特的。与Hughes-Hartogs算法相比，没有了大量的搜素和排序，简化了算法复杂度。(MIMO- OFDM systems in one of the adaptive algorithm. Chow algorithm is based on the channel capacity of each channel to allocate bits. Compared with Hughes- Hartogs algorithm, not a lot of search and sorting, simplify the algorithm complexity.)

2020-11-19 05:49:38下载

积分：1
Zlg_Modbus
MODBUS是工业领域通信协议的业界标准。这是周立功MODBUS的源码，适合应用和学习，需要的朋友可以看看。(MODBUS communication protocol is the industry standard in the industry. This is Zhou Ligong MODBUS source code, suitable for application and study, need friends can look at.)

2013-10-29 16:35:44下载

积分：1
adder
说明：用hspice写了一个做了16bit kogge stone四层点操作的树形加法器静态逻辑网表，所有管子的尺寸按照0.25u的尺寸设计挂上测试文件跑以后逻辑没问题，但是按照拉贝尔那本书上讲的关于逻辑努力优化的方法优化，在输入级加了两级buffer，只对最长路径支路尺寸优化(Use HSPICE to write a 16bit kogge made stone four layer tree adder static logic netlist, all pipe sizes according to the size of design 0.25u hang test file to run after the logic is no problem, but in accordance with the method of logic optimization efforts of Labelle's book about the optimization, plus two buffer in the input stage, only the longest path branch size optimization)

2020-12-21 11:39:08下载

积分：1

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