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简单聊天室
简单的聊天室，分为服务器和客户端，开发环境为vc6.0，自己答辩用的代码。(Simple chat rooms are divided into servers and clients.)
- 2018-06-11 21:03:15下载
- 积分：1
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QC_codes
准循环ldpc编码在matlab上的实现(Quasi-cyclic ldpc coding in matlab on the realization of)
- 2012-11-26 10:43:15下载
- 积分：1
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nnalog
恒模算法(CMA)是实际中应用最广的一种盲均衡算法,这里主要时提出了改进的lc-cma算法的源程序代码()
- 2018-02-01 17:22:07下载
- 积分：1
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cdma_blind_detect
DS-CDMA系统中的多用户盲检测算法在多径信道下的比较；对比LMSRLSKALMAN性能；代码属原创(DS-CDMA system of blind detection algorithm of many users in multipath channel of the comparison Contrast LMS RLS KALMAN performance Code of original
)
- 2012-01-13 16:04:09下载
- 积分：1
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prbs
generate prbs pattern
- 2020-06-17 02:00:01下载
- 积分：1
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Wireless-collaborative-network
无线协作网络中存在干扰时的中继选择协议
无线协作网络中存在干扰时的中继选择协议(Wireless collaborative network exists in the relay selection protocol interference)
- 2011-04-26 23:15:59下载
- 积分：1
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aoc_song
The future satellite communication systems are re-
quired to support the higher transmission data rate
for providing the multimedia services by employing
the e铿僣ient modulation method such as multi-level
QAM.
- 2009-03-13 17:44:21下载
- 积分：1
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MATLAB
接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档。这里对程序的流程进行说明。
首先根据短训练字的特性进行相关运算，进行信号到达检测，当检测到相关值大于门限一定次数后，认为有信号到达。然后根据长训练字的特性，进行相关运算，进行OFDM符号FFT窗口起始位置的估计。估计出FFT窗口的位置后，先在时域进行小频偏的估计，将两个长训练字进行小频偏补偿后，进行FFT运算，根据FFT运算的结果进行整数倍频偏的估计。这些参数估计完成后，就可以进行数据解调了。先对数据部分进行完整的频偏补偿，然后根据估计的FFT窗口位置进行FFT运算得到频域的数据，进行解调。然后在对应于导频的子载波位置上提取出导频信息，根据导频信息估计出剩余定时误差以及剩余的信道响应误差，将误差量送入环路进行跟踪。当收到所有数据后，重新回到信号到达检测状态，进行下一次信号到达的检测和信号接收。
(good)
- 2020-11-04 23:49:52下载
- 积分：1
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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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mimo
说明： 一个4*8天线数的mimo仿真程序，采用16QAM调制解调，在平坦衰落环境下的误码率情况(a 4* 8 the number of MIMO antenna simulation program using 16QAM modulation and demodulation, the decline in flat environment of the BER)
- 2021-01-05 17:08:54下载
- 积分：1
