qpsk_burst

采用GSM系统的GMSK调制方式，并画出出时频域图，计算BER，有利于了解GSM系统的调制解调。(Frequency domain using the GSM system GMSK modulation and draw the diagram, calculate the BER beneficial for GSM modem.)

通过对系统能量的收集 使系统的能效达到最大(leakage_minimization_k_user)

无线传感器网络的matlab仿真程序，有详细的仿真模块和程序说明。(Wireless sensor networks matlab simulation program, contains a detailed description of the procedures of simulation modules and.)

my first big assignment

Test for DatagramChannel Source Code for Andriod.

MIMO系统中基于压缩感知的有限反馈方法研究,D对研究有限反馈有很好的帮助。(MIMO systems with limited feedback based compressive sensing method study, D finite feedback of good help.)

删除卷积码的译码算法，分析其删除原理，给出常用删除模式(Punctured Convolutional code decoding algorithms, to analyze the deletion of principle, given the deletion of common mode)

说明：  前已提出的频谱感知方法主要包括匹配滤波器检测、 能量检测、 循环平稳特征检测以及多分辨率频谱感知. 这些方法均为单节点感知方法.然而，在阴影和深度衰落情况下， 单个节点的感知结果并不可靠， 因此， 需要对多个节点的感知结果进行融合，以提高检测可靠性， 即协作感知技术. 文献采用“或” 准则对各个 CR 感知结果进行融合. 文献则提出了基于 D-S 证据理论的协作频谱感知算法，虽然该算法的性能比“或” 准则或“与”准则要好， 但需要存储大量历史信息， 算法的计算复杂度也很高. 文献中分析了采用似然比检测(likelihood ratio test， LRT) 的软判决与采用“与” 准则的硬判决的性能， 结果表明采用软判决的协作感知性能更优(Previously proposed spectrum sensing methods mainly include matched filter detection, energy detection, cyclostationary feature detection and multi-resolution spectrum sensing. These methods are all single node sensing methods. However, in the case of shadow and deep fading, the sensing results of single node are not reliable, so, It is necessary to fuse the sensing results of multiple nodes to improve the detection reliability, i.e. cooperative sensing technology. In the literature, "or" criterion is used to fuse the CR sensing results. In the literature, a cooperative spectrum sensing algorithm based on D-S evidence theory is proposed. Although the performance of the algorithm is better than "or" criterion or "and" criterion, a large amount of historical information needs to be stored, The computational complexity of the algorithm is also very high. In the literature, the performance of the soft decision based on the likelihood ratio test)

A panel with test run counters.

对MIMO中GMD预编码性能进行仿真，采用基于QR分解的检测方法。(Simulation of GMD precoding performance in MIMO)