搜索资源列表
QPSK_TRANSMITTER
- M-file for simulating a QPSK transmitter by modulating with a pseudo random bit stream. A serial to parallel conversion of the pseudo random bit stream is performed with mapping of two bits per symbol. A cosine and sine carrier is configured and the
sdr_model
- M-file for simulating a QPSK transmitter by modulating with a pseudo random bit stream. A serial to parallel conversion of the pseudo random bit stream is performed with mapping of two bits per symbol. A cosine and sine carrier is configured and the
dPe
- 双极性码元的误比特率计算，画出误比特率曲线。-bipolar symbol of the bit error rate calculation, to give the BER curves.
sPe
- 单极性码元的误比特率计算，画出误比特率曲线。-Unipolar symbol of bit error rate calculation, to give the BER curves.
huffman_src
- I ve written some many years ago dynamic Huffman algorithm to compress and decompress data. It is mainly targeted to data with some symbols occuring more often than the rest (e.g. having some data file consisted of 3 different symbols and their total
FixToFloat.将16位二进制有符号纯小数转换为32位单精度浮点数
- 将16位二进制有符号纯小数转换为32位单精度浮点数。实际应用时，最好加tsu、tco约束条件，速度会快些。,There will be 16-bit binary decimal symbol is converted to pure 32-bit single precision floating point. Practical applications, it is best to increase tsu, tco constraints, the speed will be faste
eg6_11
- 完成M=4的DPSK通信系统的蒙特卡洛仿真，信号波形为snr2ps(snr_in_dB) 求出以dB为单位的给定信噪比的比特误码率和符号误码率.-Completion of M = 4 of the DPSK communication system Monte Carlo simulation, the signal waveform is snr2ps (snr_in_dB) calculated in units of dB signal to noise ratio for a give
MATLAB
- 产生长度为1000的标准正太分布的随机信号，画出时域波形及频谱； 采用u=255的非均匀PCM编码，每符号为8bit，画输入-输出关系图； 计算信号量化噪声比（SQNR）； 信道误码率为10-3； 解码，并画出u律反变换后的信号时域波形及频谱。 扩展要求： 采用均匀PCM、量化级数可变、信道误码率可变。 - have a standard len
QAM的蒙特卡罗仿真程序
- 当M=4时，QAM的蒙特卡罗仿真程序，绘出误符号率和误码率曲线，并和理论曲线比较。-When M = 4 Shi, QAM of the Monte Carlo simulation program, draw the symbol error rate and bit error rate curve, and and the theoretical curves.
suanshubianma
- 算术编码是将累积分布函数的区间（0，1）分成许多互不重叠的小区间，每个信源符号对应于各个小区间，每个小区间的长度等于这个信源符号的概率分布值，在此小区间内取一点，取该点二进制小数点后l位作为这个信源符号的码字。把这基本思想运用到信源符号序列中来，能计算出信源符号序列的累积分布函数，使每个符号序列对应于累积分布函数上的不同区间，在此区间上取一点，将其二进制小数点后l位作为这符号序列的码字，只要这些区间不重叠，编的的码即为算术编码。-Arithmetic coding is the cumulati
bianmayuanli
- 算术编码方法是将被编码的一则消息或符号串（序列）表示成0和1之间的一个间隔（Interval），即对一串符号直接编码成[0,1]区间上的一个浮点小数。符号序列越长，编码表示它的间隔越小，表示这一间隔所需的位数就越多。信源中的符号序列仍然要根据某种模式生成概率的大小来减少间隔。可能出现的符号概率要比不太可能出现的符号减少范围小，因此，只正加较少的比特位。-Arithmetic coding method is to be a coded message or symbol strings (seq
shizhijisuan
- 设计数值计算及显示系统，程序运行要有显示界面。提示系统所使用的方法，若输入字符不是“1”，“Q”时提示输入错误，请重新输入。可以用英文或汉语拼音显示界面。 设计要求如下： 1.按“1”，本程序能从键盘读入二个五位十进制数（1为符号+4位数位），并将这个十进制数分别转换位二进制数。然后求其和再将和以十进制数形式进行显示 2.按“Q”键，退出。 -Design of numerical calculation and display systems, display inte
8PSK_mod_simulator
- Simulation of a baseband 8PSK modulator - TX : a pseudo random bit stream generation, Serial to parallel conversion, 8PSK Mapping (Gray mapping), Signal power computation - Channel : AWGN channel - Plot constellations-Simulation of a baseband 8
DSP
- 位同步也叫码元同步或比特同步，在数字通信系统中，接受端不论采用什么解调方式，都要用到码元同步。再模拟通信中不存在码元同步。我们知道消息是通过一连串的码元来表示并传递的，这些码元一般均具有相同的持续时间，接收端就收这些码元序列时，都必须知道每个码元的起该产生一个码元定时脉冲序列，-Bit synchronization code yuan, also known as synchronous or bit synchronization in digital communication syste
nbitamul
- 对于带符号数的乘法运算，首先根据被乘数和乘数的符号位确定乘积的符号位，再进行无符号数乘法运算。如果积符为负，对积求补。-Signed for the number of multiplication, first under the multiplicand and the multiplier sign bit to determine the product of the sign bit, and then carry out unsigned multiplication. If the
Traversalalgo
- Codes". Huffman coding uses a specific method for choosing the representation for each symbol, resulting in a prefix code (sometimes called "prefix-free codes") (that is, the bit string representing some particular symbol is never a prefix of th
he_fu_man_bian_ma
- 假设一个文件中出现了8种符号S0，SQ，S2，S3，S4，S5，S6，S7，那么每种符号要编码，至少需要3bit。假设编码成000，001， 010，011，100，101，110，111。那么符号序列S0S1S7S0S1S6S2S2S3S4S5S0S0S1编码后变成 000001111000001110010010011100101000000001，共用了42bit。我们发现S0，S1，S2这3个符号出现的频率比较大，其它符号出现的频率比较小，我们采用这样的编码方案：S0到S7的码辽分别01
bit-sychronization
- 全数字锁相环实现位同步，通过3个触发器实现码元的边沿提取。基带码采用M序列仿真。-DPLL to achieve bit synchronization, achieved through three trigger symbol of the edge extraction. Baseband codes using M-sequence simulation.
Process_Algebra_www.softarchive.net
- Research towards meeting the higher demands for higher data rates was the main reason for the birth of an evolution technology towards the 4th generation mobile communication systems. This evolution to the current 3rd generation UMTS systems
Design of Digital Simulation system for QAM
- The digital simulation system using MATLAB to illustrate the Quadrature Amplitude Modulation (QAM). QAM is a modulation scheme to convey two digital bit streams which can be converted to symbol signals by modulating the amplitudes and the phase of