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vbchuankou
用VB编写的串口调试助手，附带51程序，大家可以学习，很经典，很地道(With VB serial debugging assistant, with 51 programs)
- 2013-08-28 16:44:14下载
- 积分：1
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5
说明： 5. 在三条径的瑞利信道中，对于直接序列扩频：
(1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法，接收机分别采用等均益合并、最大比合并。用Simulink进行仿真，画出比特信噪比与信道估计均方误差的关系曲线和比特信噪比与误码率的关系曲线。
(2) 设频率已经同步，请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。
(3) 设时间已经同步，请设计DS-CDMA一种具体的频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线。(5. In three-path Rayleigh channel, for direct sequence spread spectrum:
(1) please design a specific code division navigation aided channel estimation method for ds-cdma, and adopt equal-beneficial combination and maximum ratio combination for receivers respectively.Simulink is used to simulate and draw the relationship curve between bit SNR and channel estimation mean square error and the relationship curve between bit SNR and bit error rate.
(2) assuming that the frequency has been synchronized, please design a specific single-stop sliding correlation time synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and the acquisition probability curve.
(3) if the time has been synchronized, please design a specific frequency synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and frequency synchronization error curve.)
- 2019-01-15 10:58:23下载
- 积分：1
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cma
cma盲均衡算法，适用于MPSK,低阶MQAM信号。()
- 2021-04-19 16:28:51下载
- 积分：1
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code
PC与单片机通信的握手协议的建立，以及工业上单片机控制继电器的实例(PC with Single-chip communication handshake agreement set up, as well as industry examples Singlechip Control Relay)
- 2009-02-25 22:25:03下载
- 积分：1
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Modulation-recognition
AWGN信道、瑞利衰落信道、多径信道条件下的OFDM信号与单载波信号的识别(AWGN channel, Rayleigh fading channels, multipath channel conditions, single-carrier OFDM signal with the signal recognition)
- 2021-01-09 09:58:51下载
- 积分：1
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Co-Channel-Interference
关于GSM中同频干扰和邻频干扰的分析，和matlab仿真实现，有图(About the GSM co-channel interference and adjacent channel interference analysis, and matlab simulation, a map)
- 2021-04-23 02:28:48下载
- 积分：1
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4up-SensorNetHW
Wireless Sensor Network (WSN)
Platforms
- 2009-09-07 02:04:31下载
- 积分：1
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Semilogy_Plot
intelligent transportation system and internet of vehicles
- 2020-06-24 21:40:01下载
- 积分：1
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802.16标准
802.16E的协议文档，完整版本。其中包括3个版本。(802.16E protocol document, full version.)
- 2020-06-19 02:40:01下载
- 积分：1
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fwdmalawmc
Abstract—In this paper, we study the joint estimation of inphase
and quadrature-phase (I/Q) imbalance, carrier frequency
offset (CFO), and channel response for multiple-input multipleoutput
(MIMO) orthogonal frequency division multiplexing
(OFDM) systems using training sequences. A new concept called
channel residual energy (CRE) is introduced. We show that by
minimizing the CRE, we can jointly estimate the I/Q imbalance
and CFO without knowing the channel response. The proposed
method needs only one OFDM block for training and the training
symbols can be arbitrary. Moreover when the training block
consists of two repeated sequences, a low complexity two-step
approach is proposed to solve the joint estimation problem.
Simulation results show that the mean-squared error (MSE) of
the proposed method is close to the Cramer-Rao bound (CRB).
Index Terms—MIMO OFDM, CFO, I/Q imbalance, channel
estimation.
- 2012-03-29 16:33:58下载
- 积分：1
