Write a matlab function, MATLAB Programming

Assignment Help:

Write a MATLAB function called pgm which calculates the periodogram. The function inputs should be the length input vector x and its output should be the length N periodogram estimate Pxx. Generate a length N discrete random signal with the randn function and use the pgm to estimate the PSD for N = 128, 256, and 512. Inspect and comment upon the results. The theoretical autocorrelation function for this discrete Gaussian random signal equals σ2δ (i.e. there is zero similarity between the signal and a shifted version of it), where is the standard deviation of the random signal; for the above random signal (see help randn), is equal to 1. Therefore its true PSD is a constant, unity, for all frequencies. Such a signal is referred to as white noise because it has a constant spectrum independent of frequency, as an, albeit approximate, analogy with white light. The difference between this ideal PSD and those estimated with the datasets is due, in part, to their ?nite lengths. One method to improve these estimates is to apply frequency domain smoothing.

- Employ the ?lt?lt command within MATLAB to smooth the PSD estimates with a zero phase FIR ?lter with impulse response sequence 0.2*[1 1 1 1 1]. Does this improve the apparent PSD estimate?

- Generate a length 1024 discrete random signal with the randn function and sub-divide the signal into eight separate 128 point signals. Estimate the PSD for each length 128 signal and display on two plots the eight results (Note: Break each window into 2× 2 sections. Read help ?gure on how to obtain the second window). Notice the variation of the estimates.

- These eight results can be averaged to yield a new PSD estimator called the averaged periodogram which has less variation than the individual PSDs. Display this result.


Related Discussions:- Write a matlab function

GAUSS ELIMNATION, 1;write a matlab of geuss elimination with scaling and pi...

1;write a matlab of geuss elimination with scaling and pivoting under consideration?

Digging the dirt - autonomous mining robots , Digging the Dirt: Autonomous...

Digging the Dirt: Autonomous Mining Robots   Mining is a multi-billion dollar industry and a critical part of the Australian economy. Much of the day-to-day work on mining sites

Compute the result - algorithms, Compute the result: To compute the ar...

Compute the result: To compute the area, the formula is required. In this situation, the area of the circle is π multiplied by the radius squared. Therefore, that means the va

Calculate the velocity of groundwater, The characteristic properties of an ...

The characteristic properties of an aquifer can be used to calculate groundwater velocities, v groundwater (L/T), according to: where KH (L/T) is the hydraulic conductivit

Illustration of switch statement, Illustration of switch statement: He...

Illustration of switch statement: Here are the two illustrations of calling this function: >> quiz = 22; >> lg = switchletgrade(quiz) lg = X >> quiz = 9; >>

Program for combination of dynamic memory allocation, This assignment deals...

This assignment deals with the combination of dynamic memory allocation and structures to create a common data structure known as a doubly-linked list, which is shown in Figure 1.

#title.s.tudent, AApproximate the number to the hundredth, ten-thousandths,...

AApproximate the number to the hundredth, ten-thousandths, and one-hundredmillionth.sk question #Minimum 100 words accepted#

ANFIS, how to design a digital fir filter using anfis in matlab.get the cod...

how to design a digital fir filter using anfis in matlab.get the code for that.

Build a single phase model for the simple 3-phase system, Build a single ph...

Build a single phase model for the simple 3-phase system shown in the single line diagram shown below using SimPowerSystems in MATLAB Simulink. Data: Source Voltage

Common form of a function definition, Common form of a function definition:...

Common form of a function definition: The common form of a function definition for a function which computes and returns one value looks like this: For illustration, t

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd