wcdma_code_malaysia

Hadamard Transform for PAPR reduction in OFDM

说明：  现代通信系统 使用matlab 刘树堂译 中文版pdf(The use of MATLAB in modern communication system)

由于一般的功率放大器不是线性的，且动态范围是有限的，所以当OFDM系统内这种变化范围大的信号通过非线性部件时，信号会产生非线性失真。( As the general power amplifier is not linear, and the dynamic range is limited, so that when a large range of variation within an OFDM system, the nonlinear signal components, the signal will produce nonlinear distortion.)

一种未知信源数的高分辨DOA 估计算法：众多性能优良的超分辨波达方向(DOA)估计算法通常需要预先判定信源数目，然而，现有的信源数估计 算法在有限采样快拍条件下，估计性能随着信噪比的降低而下降，错误概率也相应增加，最终导致DOA 估计失败。 该文提出一种超分辨的DOA 估计算法，此算法不需要预判信源个数和进行特征值分解，同时在时变环境中，针对 快拍数较少的情况下，依然保持较高的角度分辨能力，可以被认为是综合了Capon 法和MUSIC 法的优点。(Algorithm on High Resolution DOA Estimation without Sources Number：Many of the super resolution DOA(Direction-Of-Arrival) estimation algorithms presume the number of signal sources. Since the sample snapshot is limited, however, the available algorithms on source number estimation may fail at lower SNR. In this paper, a novel algorithm for high resolution DOA estimation is proposed, which not only skips sources number estimation and EVD, but also behaves satisfactorily with a few snapshot, it may be viewed as a combination of merit of conventional Capon and MUSIC method.)

相控阵雷达的重要性就不用多说了。本人仔细编写了相控阵雷达的仿真波束图，和切比雪夫加权矩阵波束图。虽然文件不大，但是编的很辛苦的。(err)

matlab7.0应用编程，中文资料，每章一个文件(Application Programming matlab7.0, English information, each devoted to a file)

carrier frequency estimation in MIMO OFDM system

steepest descent method for estimation

用AR模型和KARMAN功率谱对脉动风进行模拟，在此基础上叠加平均风，得到风序列(KARMAN power spectrum with AR model and simulate the fluctuating wind , the average wind overlay, get wind sequence)

calculating bit error rate in hamming code using soft decoding