Location:
Search - rectangular QAM
Search list
Description: Abstract-The effect of the companding process on QAM signals
has been under investigation for the past several years. The
compander, included in the PCM telephone network to improve
voice performance, has an unusual affect on digital QAM data
signals which are transmitted over the same channel. The quantization
noise, generated by the companding process which is multiplicative
(and asymmetric), degrades the detectability performance
of the outermost points of the QAM constellation more
than that of the inner points.
The combined effect of the companding noise and the inherent
white gaussian noise of the system, leads us to a re-examination of
signal constellation design.
In this paper we investigate the detectability performance of a
number of candidates for signal constellations including, a typical
rectangular QAM constellation, the same constellation with the
addition of a smear-desmear operation, and two new improved
QAM constellation designs with two-dimensional warpi
Platform: |
Size: 1076882 |
Author: 雨笑了 |
Hits:
Description: Abstract-The effect of the companding process on QAM signals
has been under investigation for the past several years. The
compander, included in the PCM telephone network to improve
voice performance, has an unusual affect on digital QAM data
signals which are transmitted over the same channel. The quantization
noise, generated by the companding process which is multiplicative
(and asymmetric), degrades the detectability performance
of the outermost points of the QAM constellation more
than that of the inner points.
The combined effect of the companding noise and the inherent
white gaussian noise of the system, leads us to a re-examination of
signal constellation design.
In this paper we investigate the detectability performance of a
number of candidates for signal constellations including, a typical
rectangular QAM constellation, the same constellation with the
addition of a smear-desmear operation, and two new improved
QAM constellation designs with two-dimensional warpi
Platform: |
Size: 1076224 |
Author: 雨笑了 |
Hits:
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 |
Hits:
Description: 完成一个利用矩形信号星座图的M=16D的QAM通信系统的MonteCarlo的仿真-To complete a use of the rectangular signal constellation diagram of M = 16D of QAM communication system MonteCarlo Simulation
Platform: |
Size: 1024 |
Author: 欧米秋 |
Hits:
Description: rectangular qam simulink
Platform: |
Size: 10240 |
Author: 田加林 |
Hits:
Description: Neste TeleTexto vã o ser apresentadas principais características de QAM, uma modulaç ã o
digital híbrida, de amplitude e fase, de constelaç ã o habitualmente quadrada ou rectangular.
Veremos, entre outros assuntos, como gerar e desmodular um sinal de QAM e como quantificar o
desempenho da transmissã o. -Neste TeleTexto vã o ser apresentadas as principais características de QAM, uma modulaç ã o
digital híbrida, de amplitude e fase, de constelaç ã o habitualmente quadrada ou rectangular.
Veremos, entre outros assuntos, como gerar e desmodular um sinal de QAM e como quantificar o
desempenho da transmissã o.
Platform: |
Size: 107520 |
Author: Leo |
Hits:
Description: BPSK,QPSK, 8-QAM: BER curve for simulation UNCODED PERFORMANCE WITH RECTANGULAR PULSE SHAPING, With raside cosine,Coded with Hamming
Platform: |
Size: 9216 |
Author: Oana Neagu |
Hits:
Description: BER for BPSK,Qpsk, 8-QAm for UNCODED PERFORMANCE WITH RECTANGULAR PULSE SHAPING
Platform: |
Size: 1024 |
Author: Oana Neagu |
Hits:
Description: 完成一个利用矩形信号星座图的M=16的QAM通信系统monte carlo仿真。-Carlo simulation of QAM communication system Monte complete a use of the rectangular signal constellation diagram of M=16.
Platform: |
Size: 1024 |
Author: 刘艾 |
Hits:
Description: 完成一个利用矩形信号星座图的M=16的QAM通信系统的性能仿真-Completed using a rectangular signal of M =16 constellation communications system performance simulation QAM
Platform: |
Size: 1024 |
Author: xujianhui |
Hits:
Description: Create a rectangular QAM modulator, a QPSK modulator, and an AWGN Channel
Platform: |
Size: 1024 |
Author: Sha |
Hits:
Description: Theortical BER for uncoded AWGN channels for all cases, the function assumes the use of a Gray-coded signal constellation. QAM order M must be at least 4. When k=log2(M) is odd, a rectangular constellation of size M=I×J is used. berlb_CPFSK: returns a lower bound (LB) on the BER of uncoded CPFSK modulation over an AWGN channel. modindex is the modulation index, a positive real number. kmin is the number of paths.
Platform: |
Size: 1024 |
Author: Hussein |
Hits:
Description: 这个 matlab 代码仿真了M-QAM的传输。M的取值不同，调制方式分别为4QAM，16QAM，64QAM等。传输信道为AWGN信道，能出误码率曲线(Digital Unit Impulse Discrete Harmonic Signals and their Linear Combination
Harmonic Signal with Exponential Envelope.
Periodic Sequence of Rectangular Impulses
Mixture of Harmonic Signal and White Gaussian)
Platform: |
Size: 3072 |
Author: Bieke |
Hits: