PURPOSE: To reduce the cost by utilizing the same nonlinear 16 QAM signal as a maximum amplitude with respect to the amplitude of an intermediate amplitude signal. ;CONSTITUTION: In the nonlinear 16 QAM modulation system, a maximum amplitude detecting means 1 detects the input of a signal which...
It has 16 multiplexing channels, 16 scrambling channels, and 16 QAM (DVB-C) modulating channels, and supports a maximum of 512 IP input through the GE port and 16 non-adjacent carriers (50MHz~960MHz) output through the RF output interface. The device is also characterized b...
4.对16.QAM的全系统进行Simulink建模仿真。综上,本文对基于软件无线电的16.QAM调制解调技术进行了详细的分析与研究,并建立了一个比较完整的通信模型,最后通过Simulink仿真证明了设计结果的正确性。关键词:软件无线电16.QAM码元定时载波恢复ABSTRACTAsahighefficiencydigitalmodulationanddemodulationscheme,16一QAMiswidelyused...
Demodulation apparatus and method in communication system employing 16-ary QAMdoi:CN1324868 C本发明公开了一种16-元QAM(正交调幅)解调设备. The present invention discloses a 16-- per QAM (Quadrature Amplitude Modulation) demodulation device. 第一计算器通过从正交相位分量Y The first calculator from the...
The bit-error rate (BER) performance of differential 16 STAR-QAM in frequency-selective Rician fading channels with diversity reception is theoretically analyzed for three different types of delay profiles: double-spike, one-sided exponential, and Gaussian profiles as well as two kinds of pulse-shap...
16 QAM or 32 QAM out Module3 256*IP to 16 or 32*QAM modulation Module1 256*IP to 4*COFDM modulation Module2 256*IP to 8*ATSC-T modulation Module4 multiplexing & scrambling 108Mbps per IP address 840Mbps per IP port 2*GigE input port RJ45 and SFP, backup for each other. 2*GigE ...
ordermodulationmodeis worth exploring.This paper comparativeanalysis ber performance of1 6一APSK, 1 6・ -QAM and16-PSKinthesatellitenonlinearchannelandfocusonthat16・ ・ APSK performance howto adapt to thenonlinearsatellite channel.Then,it researchand improve themodulationanddemodulation algorithmof...
Since the 40 GHz dual-tone optical carrier is generated by frequency quadrupling via a LiNbO3 modulator and the two 10 Gbit/s \\{QAM\\} signal... LC Yu - 《Optics & Laser Technology》 被引量: 10发表: 2013年 Single-Channel Directly Detected Optical-OFDM Towards Higher Spectral Efficiency...
16APSK体制又称为星型16QAM,不同于一般的QAM信号,它的星座图是由内外2个同心圆组成,通过这样的星座设计,减少了信号的幅度变化,更易于对放大器的非线性进行补偿,适应线性特性不好的传输信道,以获得更高的频谱利用率,也有利于降低解调难度[2]。如果将16个星座点的APSK调制分解为2个独立的8PSK调制,这样形成的APSK...
512 IP (GE1only)input over UDP and RTP protocol 2 ASI input, BNC interface Tuner Section DVB-C Standard J.83A(DVB-C), J.83B, J.83C Frequency In 30 MHz~1000 MHz Constellation 16/32/64/128/256 QAM DVB-T/T2 Frequency In 30MHz ~999.999 MHz Ban...