举个例子:我在matlab中完成了sigma-delta的调制器的模拟,这个主要是根据一些资料和我自己的理解进行的,写完以后,我发现,整个调制,比如说针对32bit的pcm信号,那么一次只迭代32次。来产生32个bit流。虽然如此,但是为什么不能直接拆分这32bit的每一个bit进行输出呢? 谢谢!
This paper extends the reported work by investigating the sigma-delta modulation approaches for developing a computationally efficient low-power image processing algorithm. The proposed model is designed, developed, and simulated in MATLAB. The simulation results are analyzed using SNR,...
“After all, the field of delta-sigma modulation encompasses many diverse disciplines: systems and control theory, digital and analog signal processing, VLSI integrated circuit design, and knowledge of consumer and communications applications.” “We did not feel qualified by ourselves to write about ...
%SigmaDeltaModulationParametersSetting %*** a1=0.066;a2=0.12;a3=0.22;a4=0.4; g1=0.97;g2=0.97;g3=0.97;g4=0.97;g5=0.97; %*** %OpenSimulinkdiagramfirst %***
使用Matlab filter builder工具箱,分别设置通带波纹和阻带衰减为0.01 dB和90 dB,得到16阶补偿滤波器系数,对其进行CSD编码,从而减少系数中1的个数,进一步降低功耗。 3.3 半带滤波器 本文采用半带滤波器对信号进行最后一级的滤波和降采样。由于半带滤波器中一半的系数为0,功耗较低。使用Matlab filter builder工具箱...
1.6 Continuous-Time Delta-Sigma Modulation 连续时间ΔΣ调制器的原理和优势将在CHAP.8中说明,同时,CTΔΣ调制器也饱受诸多非线性影响,这将在CHAP.9详述,其电路模块实现将在CHAP.10给出。 Reference: Pavan S Schreier R Temes GC.Understanding Delta-Sigma Data Converters. 2nd ed. Piscataway Hoboken: IEEE ...
[2] J. Song and I. Park, "Spur-Free MASH Delta-Sigma Modulation," inIEEE Transactions on Circuits and Systems I: Regular Papers, vol. 57, no. 9, pp. 2426-2437, Sept. 2010, doi: 10.1109/TCSI.2010.2043993. PSD MATLAB 代码 1
The method relies on QRS/PT detection, Sigma-Delta Modulation (SDM), One-Dimensional Convolution Neural Networks (1D-CNN) algorithms. The QRS/PT wave detection system is based on the 1D-CNN and SDM framework with local minimum and local maximum point algorithms. We proposed a Long Short-Term...
Circuits and methods for eliminating charge errors caused by parasitic capacitances of delta sigma modulators, which comprises - provide in a modulation stage a first switching means for both positive and negative connections between an output of a differential Gm integrator and a correspondent integrati...
Im working on a project using Delta sigma modulator in OFDM but Im getting higher bit error rate (BER) while comparing to existing one.i want to reduce the BER.. Is there any method to reduce it within the toolbox or to use any other method outside the toolbox?