# Tag Info

Accepted

### Is there a condition for bandpass sampling?

It's generally not true that a band pass signal can be sampled and recovered without error if $f_s>2B$ is satisfied, where $B=f_h-f_l$ is the signal's bandwidth. This condition is just necessary ...
• 80.4k
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### What is a $BT$ (Bandwidth-Time) product with reference to modulation?

The $BT$ product is the bandwidth-symbol time product where $B$ is the $-3\textrm{ dB}$(half-power) bandwidth of the pulse/filter and $T$ is the symbol duration. For different applications you will ...
• 3,282

### How do I calculate the bandwidth from a waveform?

A sinusoidal signal is represented as $$x(t) = \mathrm{cos}(\omega t) = \mathrm{cos}(2\pi f t)$$ $\omega$ is the angular frequency and $f$ is the frequency. See Frequency definition. Your signal \...
• 5,780
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### Correct way to add AWGN to a signal

Short answer 10*log(bw/fs) to take into account the oversampling operation because the awgn() function specifies the signal-to-...
• 5,780
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### Relation between Bandwidth and Baud-Rate for 8-PSK

The final statement is correct, for PSK with proper pulse shaping the baud rate and the bandwidth are the same (the bandwidth will typically be 20-30% higher than the symbol rate, but read on). The ...
• 37.7k
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• 12.5k
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• 37.7k
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### How is the maximum theoretical data rate of a channel equal to $2B\log_2(V)$ bits/sec.?

Each sample is at one of $V$ total levels. The number of bits needed to encode $V$ levels is $\log_2(V)$. If you send $2B$ of these samples per second, then the total number of bits sent per second (...
• 23k