Contents
What is the bandwidth range used in FHSS?
Frequency hopping spread spectrum is defined in the 2.4 GHz band and operates in around 79 frequencies ranging from 2.402 GHz to 2.480 GHz. Every frequency is GFSK modulated with channel width of 1MHz and rates defined as 1 Mbps and 2 Mbps respectively.
How do you choose ADC sampling rate?
For ADCs like Flash convertors and SAR, the sample rate for each channel can be calculated by dividing the specified sample rate by the number of channels.
How does FHSS share bandwidth?
For FHSS, a given bandwidth (range of frequencies) is divided into many different distinct channels. Bluetooth, for example, uses the 2.4 – 2.843 Ghz bandwidth, with 79 defined channels. In order to send a signal, the transmitter and receiver must first synchronize on a particular channel and seed value.
Which type of demodulator is used in frequency hopping techniques?
Which type of demodulator is used in the frequency hopping technique? Explanation: As it is difficult to maintain phase coherence, non coherent demodulator is used.
What kind of sampling frequency do you need?
A proper sampling requires a 6kHZ sampling frequency or higher Effects of aliasing: It can change the signal real frequency and the signal real phase (as we saw in previous slide) f m f s 2 =0.5″f s
What is the sample rate of a sinusoidal signal?
It is specified as the frequency at which a sinusoidal input signal is attenuated to 70.7% of its original amplitude (the -3 dB point). That may come as a surprise as designers often assume a scope gives an exact picture of the signal at the probe tip, but its not actually the case.
What is the analog bandwidth of an oscilloscope?
The frequency at which the amplitude of the transfer function is attenuated by 3 dB is considered the analog bandwidth f BW of the scope. This is illustrated in Figure 2.
Where does DAC and ADC conversion take place?
From digital signals to analog signals (DAC) – Signal reconstruction from sampled data III. DFT and FFT ADC and DAC Analog-to-digital conversion (ADC) and digital-to-analog conversion(DAC) are processes that allow computers to interact with analog signals. These conversions take place in e.g., CD/DVD players.