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Feb 5, 2021 · Modulation is simply a widely used process in communication systems in which a very high-frequency carrier wave is used to transmit the low-frequency message signal so that the transmitted signal continues to have all the information contained in the original message signal.
May 26, 2021 · In this review, we explore how neuromodulators regulate the neuronal circuits that control context-dependent communication by describing several examples across species including frogs, birds, fish, and rodents. Communication behaviors can vary over a wide range of timescales, from milliseconds to the lifespan of the animal.
- Charlotte L Barkan, Elizabeth C Leininger, Erik Zornik
- 2021
To transmit signals with frequencies required by the communication channel, the transmitter centers the spectrum of the information signal at the transmission frequency. This process of shifting the frequency spectrum of a signal is called modulation. As an example human voice spans a 4 kHz range or bandwidth, and is centered at 0 kHz. In order ...
Dec 23, 2021 · Definition. Modulation is a process of mixing a signal with a sinusoid to produce a new signal. This new signal, conceivably, will have certain benefits over an un-modulated signal. Mixing of low frequency signal with high frequency carrier signal is called modulation.
Neuronal communication is therefore envisioned as the means of causing neurons to fire action potentials. A simplistic view is that such communication is the job of neurotransmission. However, neuromodulation plays just as direct a role in communicating such information.
Digital modulation (or channel encoding) is the process of converting an input sequence of bits into a waveform suitable for transmission over a communication channel. Demodulation (channel decoding) is the corresponding process at the receiver of converting the received waveform into a (perhaps noisy) replica of the input bit sequence.
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The idea of layering in communication systems is to break up communication functions into a string of separate layers as illustrated in Figure 1.2. Each layer consists of an input module at the input end of a communcation system and a ‘peer’
