File Name: dsb sc modulation and demodulation writer.zip
In electronics , ring modulation is a signal processing function, an implementation of frequency mixing , performed by creating multiple frequencies from those of the two signals , where one is typically a sine wave or another simple waveform and the other is the signal to be modulated. A ring modulator is an electronic device for ring modulation. A ring modulator may be used in music synthesizers and as an effects unit. The function derives its name from the fact that the analog circuit of diodes originally used to implement this technique takes the shape of a ring; a diode ring.
A single tone corresponds to a shifted delta peak in the frequency domain; a multiplication corresponds to a convolution in the frequency domain. Hence, multiplying with a tone in time domain corresponds to convolving with a shifted delta peak in the frequency domain. Finally, convolution with a shifted delta peak is nothing but shifting - and that is what you want to do. I think you're already set, but the least computationally intensive way to shift your signal in frequency is to multiply it by a complex sinusoid in the time domain.
Are the sidebands identical? Or is it stereo AM or something. However, if it's vestigial sideband or you have some other carrier reference, a better way to receive it is to recover the carrier, then multiply the signal by your recovered carrier. A search on "exalted carrier AM reception" should give you some material to work with.
I have done this: say S w is my FFT output. What I should do? Every suggestion in very appreciated. So you need to perform your multiplication in the time domain I'm totally out of road. I'm developing Costas loop in order to demodulate my signal Thanks you so much Regards, Paolo.
What you're doing appears to just be a multiplication by a constant. Oy crap. Is it vestigial carrier, or do you otherwise have a carrier reference? Sign in Sign in Remember me Forgot username or password? Create account.
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Updated 08 Apr View Version History. Transmission in which: a frequencies produced by amplitude modulation are symmetrically spaced above and below the carrier frequency and b The carrier level is reduced to the lowest practical level, ideally completely suppressed. In the double-sideband suppressed-carrier transmission DSB-SC modulation, unlike AM, the wave carrier is not transmitted; thus, a great percentage of power that is dedicated to it is distributed between the side bands, which implies an increase of the cover in DSB-SC, compared to AM, for the same power used.
Светлые волосы тщательно уложены. - Прошу меня извинить, - пробормотал Беккер, застегивая пряжку на ремне. - Мужская комната оказалась закрыта… но я уже ухожу. - Ну и проваливай, пидор. Беккер посмотрел на нее внимательнее. К ней как-то не шло сквернословие - как неуместны сточные воды в хрустальном графине.
Мужские голоса. Они долетали до нее из вентиляционного люка, расположенного внизу, почти у пола. Сьюзан закрыла дверь и подошла ближе. Голоса заглушал шум генераторов. Казалось, говорившие находились этажом ниже.
(I) Double Sideband Suppressed Carrier AM Modulator DSB-SC. Hayder Abdalrahem SCICOS contains a graphical editor that can be used to construct block diagram Many digital modulation techniques are DSB-SC with a digital message signal. pmwiki/uploads/Workshop//teach_wireless.pdf.