Table of Contents
How do you plot a raised cosine pulse in Matlab?
Pass a Signal through a Raised Cosine Filter
- Copy Command Copy Code.
- rolloff = 0.25; % Rolloff factor span = 6; % Filter span in symbols sps = 4; % Samples per symbol.
- b = rcosdesign(rolloff, span, sps);
- d = 2*randi([0 1], 100, 1) – 1;
- x = upfirdn(d, b, sps);
- r = x + randn(size(x))*0.01;
- y = upfirdn(r, b, 1, sps);
How does Matlab implement pulse shaping?
Pulse Shaping Using a Raised Cosine Filter
- M = 16; % Modulation order k = log2(M); % Bits/symbol n = 20000; % Transmitted bits nSamp = 4; % Samples per symbol EbNo = 10; % Eb/No (dB)
- span = 10; % Filter span in symbols rolloff = 0.25; % Rolloff factor.
- txfilter = comm.
- fvtool(txfilter,’impulse’)
- errorRate = comm.
Why use root raised cosine?
Using 90% power Bandwidth (BW) measurement definition showed that the RRC filtering might improve spectrum efficiency by more than 75%. Furthermore using the matching RRC filters both in the transmitter and receiver provides the improved Bit Error Rate (BER) performance.
How do you create a pulse train in Matlab?
y = pulstran( t , d , func ) generates a pulse train based on samples of a continuous function, func . y = pulstran( t , d , func , fs ) uses a sample rate of fs . y = pulstran( t , d , p ) generates a pulse train that is the sum of multiple delayed interpolations of the prototype pulse in vector p .
Why is pulse shaping needed?
In electronics and telecommunications, pulse shaping is the process of changing the waveform of transmitted pulses. Its purpose is to make the transmitted signal better suited to its purpose or the communication channel, typically by limiting the effective bandwidth of the transmission.
How do you make a pulse train?
To generate a pulse train, scroll down to the bottom of the menu and select the Pulse Composer menu button….Each row in the table includes the following parameters:
- Segm. The index number of the segment.
- Level. The voltage level of the pulse.
- Segment Duration.
- Pattern Duration.
How can you generate pulses of train from sine wave?
The pulse train needs to be a function of parameters such as pulse-width (PW), pulse repetition frequency (PRF), sampling rate, amplitude, etc. I know that I can use zeros() to implement a delay between consecutive pulses, in order to represent the pulse train’s PRF.
Why is pulse shaping technique used?
Why is pulse shaping technique used? Explanation: Pulse shaping techniques reduces the intersymbol interference. They are also used to reduce the spectral width of the modulated digital signal.
How do you upsample in Matlab?
y = upsample( x , n ) increases the sample rate of x by inserting n – 1 zeros between samples. If x is a matrix, the function treats each column as a separate sequence. y = upsample( x , n , phase ) specifies the number of samples by which to offset the upsampled sequence.
How do you oversample in Matlab?
If you want to use an Oversampling factor greater than one, set ClockInputs to Single . If you specify an Oversampling factor greater than one, make sure that the clock-rate pipelining optimization is enabled. You can specify this setting in the HDL Code Generation > Target and Optimizations > Pipelining tab.
How do you do Upsampling in Matlab?
What is the need of Upsampling?
The purpose of upsampling is to add samples to a signal, whilst maintaining its length with respect to time. Consider again a time signal of 10 seconds length with a sample rate of 1024Hz or samples per second that will have 10 x 1024 or 10240 samples.
How do you create a Gaussian pulse in Matlab?
Description. yi = gauspuls( t , fc , bw , bwr ) returns a unit-amplitude inphase Gaussian RF pulse with a fractional bandwidth of bw as measured at a level of bwr dB with respect to the normalized signal peak. [ yi , yq ] = gauspuls(___) also returns the quadrature pulse.
How do you make a pulse waveform?
Generation. A pulse wave can be created by subtracting a sawtooth wave from a phase-shifted version of itself. If the sawtooth waves are bandlimited, the resulting pulse wave is bandlimited, too. A single ramp wave (sawtooth or triangle) applied to an input of a comparator produces a pulse wave that is not bandlimited.
How to plot root raised cosine pulse for beta?
pt_RootRaisedCosine = ( (sin (pi*t.* (1-B)) + 4*B*t.*cos (pi*t* (1+B))) ./ (pi*t.* (1- (4*B*t).^2))); I am trying to plot root raised cosine pulse for Beta equal to 0.5.
What is the impulse response of a square root raised cosine filter?
The impulse response of a square root raised cosine filter with rolloff factor R is The impulse response of a square root raised cosine filter convolved with itself is approximately equal to the impulse response of a normal raised cosine filter.
What is the difference between sinc pulse and raised cosine pulse?
As mentioned earlier, the shortcomings of the sinc pulse can be addressed by making the transition band in the frequency domain less abrupt. The raised-cosine (RC) pulse comes with an adjustable transition band roll-off parameter , using which the transition band’s rate of decay can be controlled.
How to generate a raised-cosine pulse at a singularity?
The value of the raised-cosine pulse at these singularities can be obtained by applying L’Hospital’s rule [1] and the values are The following Matlab codes generate a raised cosine pulse for the given symbol duration and plot the time-domain view and the frequency response (shown in Figure 1).