Table of Contents

## What is the AWGN channel?

An AWGN channel adds white Gaussian noise to the signal that passes through it. You can create an AWGN channel in a model using the comm. AWGNChannel System objectâ„¢, the AWGN Channel block, or the awgn function.

### Why do we add AWGN channel?

The random nature of noise can distort signals and the integrity of electrical systems. Therefore, noise generators can help measure a system’s response to noise, using an AWGN channel to introduce an average number of errors through the system.

#### What is matched filter receiver?

Advertisements. If a filter produces an output in such a way that it maximizes the ratio of output peak power to mean noise power in its frequency response, then that filter is called Matched filter.

**Why AWGN has zero mean?**

AWGN is additive white Gaussian noise. Its mean is zero according to Gaussian distribution. the power of real signal spreads over negative and positive frequency. So, No/2 stands for two-sided power spectral density.

**How can I increase my channel capacity?**

According to the equation, the only way to increase the channel capacity is to either increase the bandwidth or increase the SNR.

## What is optimum receiver?

Optimal Receiver: An optimal receiver is one that is designed to minimize the probability that a decision error occurs. There exists no other receiver structure that can provide a lower probability of error.

### What is the average power of white noise signal?

infinity

Explanation: White noise is a idealized process with two sided spectral density equal to constant N0/2 and frequencies varying from minus infinity to plus infinity. Thus the average noise power is infinity.

#### How do you remove noise from a signal in Matlab?

To apply the filter filt1 you just created to the signal noise ,

- In SPTool, select the signal noise[vector] from the Signals list and select the filter (named filt1[design] ) from the Filters list.
- Click Apply under the Filters list.
- Leave the Algorithm as Direct-Form FIR .
- Enter blnoise as the Output Signal name.

**What is the Shannon limit for AWGN channel?**

band-limited AWGN channel with W 3500 Hz and SNR 37 dB. The Shannon limit on spectral efficiency and bit rate of such a channel are roughly p < 37/3 12. 3 (b/s)/Hz and R < 43,000 b/s.

**How do I know my channel capacity?**

Hence, the channel capacity is directly proportional to the power of the signal, as SNR = (Power of signal) / (power of noise). So for example a signal-to-noise ratio of 1000 is commonly expressed as: 10 * log10(1000) = 30 dB.