06618_52RD_bluetooth

802.11无线网络权威指南+第二版（中文版）(Ppls of 802.11 Wireless Networks The Definitive Guide, Second Edition (Chinese Edition))

卷积码的Viterbi译码算法仿真程序 要求：递归卷积码，归零处理(Convolutional Codes Viterbi decoding algorithm simulation program requirements : recursive convolutional codes and zeroing treatment)

1）设计Butterworth型音频抗混叠滤波器； 2）参数： 下通带频率300Hz；上通带频率3400Hz； 下阻带频率280Hz；上阻带频率3600Hz； 通带最大衰减0.3dB； 阻带最小衰减40dB； 3）采用一低通滤波器和一高通滤波器级联； 4）分别确定LPF和HPF的性能指标； 5）求出两滤波器的系统函数和频率响应，并画出其幅频特性曲线； 6）求整个滤波器的系统函数和频率响应，并画出其幅频特性曲线。(1) the design of Butterworth-type audio anti-aliasing filter 2) parameters: passband frequency of 300Hz on pass-band frequency 3400Hz under the stop-band frequency of 280Hz on stop-band frequency 3600Hz passband maximum attenuation of 0.3dB minimum stopband attenuation of 40dB 3) the use of a low-pass filter and a high-pass filter cascade 4) separately to determine the performance of LPF and HPF target 5) to derive two-filter system function and frequency response, and draw its increase frequency characteristic curve 6) for the entire filter system function and frequency response, and draw its amplitude-frequency characteristic curve.)

说明：  用于FDD网络的D2D联合资源分配，matlab仿真程序。(D2D joint resource allocation for FDD network, matlab simulation program.)

MANET routing model with DSR

说明：  采用QAM调制的方式，实现OFDM信号的PAPR的降低，并且提供了由optisystem转换到MATLAB接口的代码(QAM modulation is adopted to reduce the PAPR of OFDM signal, and the optisystem port is provided to convert to MATLAB code)

说明：  利用伪随机序列作为发送信号，经过信道，产生了频偏和相位偏移，利用数字锁相环的原理实现对信号的频率估计和相位估计，实现信号的载波同步。(The frequency offset and phase offset are generated by using pseudo-random sequence as the transmitting signal through the channel. The frequency estimation and phase estimation of the signal are realized by using the principle of digital phase-locked loop, and the carrier synchronization of the signal is realized.)

2ASK(OOK)信号的解调.svu 2ASK与MASK的功率谱.svu 2DPSK的差分编码与解码.svu 2FSK非相干解调.svu 2FSK相干解调.svu 2PSK与2DPSK调制.svu ASK的OOK法生成.svu Costas锁相环解调2DPSK.svu(2ASK (OOK) signal demodulation. Svu 2ASK MASK with the power spectrum. Svu 2 DPSK Differential encoding and decoding. svu 2FSK non-coherent demodulation. svu 2FSK coherent demodulation. sv u 2PSK with 2DPSK modulation. svu ASK Generation of OOK. Costas PLL svu Demodulation two DPSK.svu)

本文提出在数字移动通信中子带滤波器组处理可以提高不同阵元信号的相关性，从而能改善自适应阵列抑制码间干扰(ISI)和共信道干扰(CCI)的能力．在文[6]的基础上，本文研究了子带滤波器组在宽带自适应天线旁 瓣相消中的应用，对其原理进行了理论分析，提出了有效的子带处理方法．经研究表明，子带滤波器组处理能有效增加主、辅助天线信号的相关性，从而提高系统干扰相消比．而且适当的过采样能使系统干扰相消比进一步提高．计算机仿真结果和实测雷达数据处理结果证实了子带处理方法的有效性和理论分析的正确性．(err)

GPRS is a communication technology that allows data acquisition systems to overcome the difficulty of cabling for wide area remote sites. GPRS applications are becoming more and more prevalent due to the ease with which they can be implemented, but the dynamic IP address issues associated with GPRS networking continue to frustrate system integrators.