tidutuxiang

正交频分复用是一种多载波宽带数字调制技术。相比一般的数字通信系统， 它具有频带利用率高和抗多径干扰能力强等优点，因而适合于高速率的无线通信系统。( OFDM Simulator -------------------------------------------------------------------------------- MIMO OFDM Simulator: OFDM.m: OFDM Simulator (outer function) create_channel.m: Generates a Rayleigh fading frequency-selective channel, parametrized by the antenna configuration, the OFDM configuration, and the power-delay profile. svd_decompose_channel.m: Since full channel knowledge is assumed, transmission is across parallel singular value modes. This function decomposes the channel into these modes. BitLoad.m: Apply the bit-loading algorithm to achieve the desired bit and energy allocation for the current channel instance. ComputeSNR.m: Given the subcarrier gains, this simple function generates the SNR values of each channel (each singular value on each tone is a separate channel). chow_algo.m: Apply Chow s algorithm to generate a particular bit and energy allocation. EnergyTableInit.m: Given the SNR values, form a table of energy increments for )

直流电动机 降压软启动 simulink模型 参考(Step-down DC Motor soft-start simulink model reference)

frequency modulator, in Simulink simulation system modulation fm.

用内点法实现电力系统潮流的优化问题上，代码完整，已经通过测试(Interior point method for power system optimization)

these are codes for thermodynamics.

说明：  本程序实现的功能是：bpsk在matlab上的调制解调(modulation and demodulation of bpsk on matlab.)

this is the function of the the differential of equation that program the modeling

matlab program about optimal load flows

matlab程序设计入门 广州大学土木工程学院力学教研室编写 2004年2月(matlab programming entry Guangzhou University School of Mechanics, Civil Engineering Department in February 2004, written)

在一张表中标注了CTFT，DTFT，DFT之间的对应关系，列出公式，给出了简单认证，同时加上文字说明(Marked in a table of correspondence between CTFT, DTFT, DFT between lists formula gives a simple certification, plus text)