Description: adsl 模块中的另一部分，Serial/Parallel, Parallel/Serial及Constellation Mapping部分。-adsl Module of the other part, Serial / Parallel, Parallel / Serial and Constellation Mapping part. Platform: |
Size: 1289 |
Author:sicenglou |
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Description: This project aim was to build wireless software modem for data communication
between two computers using an acoustic interface in the voice frequency range (20Hz–
20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz –
20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz –
16,000Hz). The test files used as information files were text files.
This goal was attained both in an incoherent scheme and in a coherent scheme.
Build under Matlab code, our modem uses OFDM (orthogonal frequency division
multiplexing) modulation, synchronization by LMS sequence, channel estimation (no
equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of
2 or 4. To optimize the probability of error, these symbols were mapped using Gray
mapping.
Report Platform: |
Size: 559541 |
Author:buyop |
Hits:
Description: This project aim was to build wireless software modem for data communication
between two computers using an acoustic interface in the voice frequency range (20Hz–
20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz –
20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz –
16,000Hz). The test files used as information files were text files.
This goal was attained both in an incoherent scheme and in a coherent scheme.
Build under Matlab code, our modem uses OFDM (orthogonal frequency division
multiplexing) modulation, synchronization by LMS sequence, channel estimation (no
equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of
2 or 4. To optimize the probability of error, these symbols were mapped using Gray
mapping.
Report-This project aim was to build wireless software modem for data communicationbetween two computers using an acoustic interface in the voice frequency range (20Hz-20000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz-20000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz-16000Hz). The test files used as information files were text files.This goal was attained both in an incoherent scheme and in a coherent scheme.Build under Matlab code, our modem uses OFDM ( orthogonal frequency divisionmultiplexing) modulation, synchronization by LMS sequence, channel estimation (noequalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of2 or 4. To optimize the probability of error, these symbols were mapped using Graymapping.Report Platform: |
Size: 559104 |
Author: |
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Description: 本程序用于完成BPSK、QPSK、pi/4QPSK、OQPSK、8PSK、16QAM、32QAM、64QAM和128QAM的调制仿真。并可任意扩展到MPSK和MQAM。程序分成四个部分，fir.m对基带码元序列进行脉冲成型，可选矩形脉冲，升余弦脉冲和平方根升余弦脉冲； modal.m 为主程序，完成岁各种信号的基带星座图映射、脉冲成型和调制；pi4QPSK.m 为pi/4QPSK信号的星座图映射程序；test1.m给出一个简单的频谱显示测试。-This procedure for the completion of BPSK, QPSK, pi/4QPSK, OQPSK, 8PSK, 16QAM, 32QAM, 64QAM and the modulation 128QAM simulation. Arbitrary and may be extended to MPSK and MQAM. Procedures are divided into four parts, fir.m of baseband symbol pulse sequences forming, optional rectangular pulse, raised cosine square root raised cosine pulse and pulse modal.m-based procedures, the completion of the age range of the base-band signal constellation diagram mapping, pulse shaping and modulation pi4QPSK.m for pi/4QPSK signal constellation diagram mapping procedures test1.m given spectrum shows a simple test. Platform: |
Size: 4096 |
Author:徐哲 |
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Description: OFDM系列之一：OFDM_demodulation
OFDM系统实现的C语言实现。绝对好程序，包括调制解调，星座映射等内容。-OFDM one of the series: OFDM_demodulation OFDM system of the C language. Definitely a good program, including the modulation and demodulation, constellation mapping and so on. Platform: |
Size: 362496 |
Author:Lv Sean |
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Description: 本程序用于完成BPSK、QPSK、8PSK的调制仿真。并可任意扩展到MPSK和MQAM。程序分成三个部分：phase.m对基带码元序列进行脉冲成型，可选矩形脉冲，升余弦脉冲和平方根升余弦脉冲； model.m 为主程序，完成各种信号的基带星座图映射、脉冲成型和调制； command.m给出一个简单的频谱显示测试。-This procedure for the completion of BPSK, QPSK, 8PSK modulation simulation. Arbitrary and may be extended to MPSK and MQAM. Program is divided into three parts: phase.m symbol of the baseband shaping pulse sequences, optional rectangular pulse, the square root raised cosine pulse and raised cosine pulse model.m-based procedures, completed a variety of base-band signal constellation mapping , pulse shaping and modulation command.m given spectrum shows a simple test. Platform: |
Size: 4096 |
Author:long |
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Description: BPSK信号的产生以及绘制信号的星座图，更好的理解了信号的时域和频域特性-BPSK signal generation and the mapping signal constellation, a better understanding of the signal in time domain and frequency domain characteristics Platform: |
Size: 1024 |
Author:zhouwt |
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Description: QAM是一种矢量调制，将输入比特先映射（一般采用格雷码）到一个复平面（星座）上，形成复数调制符号，然后将符号的I、Q分量（对应复平面的实部和虚部，也就是水平和垂直方向）采用幅度调制，分别对应调制在相互正交（时域正交）的两个载波（cos wt和sin wt）上-QAM is a modulation vector, the first mapping the input bits (Gray code commonly used) to a complex plane (constellation), the formation of complex modulation symbols, then symbols I, Q components (corresponding to the complex plane of the real and imaginary parts , that is, horizontal and vertical) using amplitude modulation, corresponding to the modulation in the orthogonal (orthogonal time-domain) of the two carriers (cos wt and sin wt) on Platform: |
Size: 169984 |
Author:baibai |
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Description: 一个非常完整的数字基带传输系统实现，包括信源产生，信道编码，交织，星座映射和基带成型，包括了完整的接收机设计，能够在此基础上做各种仿真，注释丰富，接口完善，极易扩展。-A very complete digital baseband transmission system implementation, including source generation, channel coding, interleaving, constellation mapping and baseband shaping, including a complete receiver design, this can be done on the basis of the simulation, rich annotation, interface perfect, easy to expand.
Platform: |
Size: 105472 |
Author:momi |
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Description: 这个程序是有关通信系统的仿真，调制、解调、加噪、滤波以及统计误码率，和星座图的绘制，包含很多个独立的小函数以及一个主函数！-This program is a simulation of the communication system , modulation, demodulation , adding noise, filtering and statistical BER, and constellation mapping, contains many independent functions as well as a main function !
Platform: |
Size: 5120 |
Author:吴明英 |
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Description: 实现完整的通信链路仿真，包含星座图、符号映射、ofdm、信道衰落、调制解调-Achieve complete communication link simulation, including constellation, symbol mapping, ofdm, channel fading, modulation and demodulation Platform: |
Size: 35840 |
Author:冯文 |
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Description: The paper deals with the Matlab implementation and simulation of channel coding
and modulation of DVB-T (Digital Video Broadcasting – Terrestrial). Transport
stream multiplex adaptation and randomization for energy dispersal, outer coding
and interleaving, inner coding and interleaving, constellation and mapping blocks of encoder and decoder are implemented. Channel encoder and decoder Platform: |
Size: 418816 |
Author:qasim |
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Description: 32QAM中的数据星座图映射用LAbview实现，可以进一步借鉴，实现其他QAM星座图映射。(The data constellation map in 32QAM is implemented by LAbview, and can be further used for reference to realize other QAM constellation mapping.) Platform: |
Size: 13312 |
Author:gunkunjun
|
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Description: Inter modulation (SM), as a novel multi antenna transmission scheme, creates a mapping relationship between input bits and transmit antenna ordinal numbers, which is used to carry certain transmission information. However, the scheme maps the sending bits to a uniform distribution signal constellation through a single layer modulation mode, which greatly limits the performance of the system. Hierarchical map coding (SCM) technology is applied to constellation point mapping, which satisfies different quality of service (QoS) requirements of different data services on the same transmission slot, and effectively improves system performance. Based on the principle of SCM, a low complexity detection algorithm is proposed. The simulation results show that the detection performance of the new algorithm is approximate to the maximum likelihood (ML), and the complexity of the receiver increases linearly with the modulation order. Platform: |
Size: 2582528 |
Author:appletime81 |
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Search - constellation and mapping