# EQ1270 Stochastic Signals and Systems 6.0 credits

#### Stokastiska signaler och system

The course gives a broad overview of modeling using stochastic processes in electrical engineering applications. Formulating problems using mathematical modeling is an important part of the course.

Basics about continuous time an discrete time stochastic processes, especially weakly stationary processes. Definitions of probability distribution and density functions, statistical mean, mean power, variance, autocorrelation function, power spectral density, Gaussian processes and white noise. Linear filtering of stochastic processes.

Ergodicity: Estimation of statistical properties from measurements.

Sampling and reconstruction: Transformations between continuous and discrete time signals. Influence of sampling, sampling theorem. Pulse amplitude modulation. Errrors in the reconstruction of stochastic signals.

Estimation theory: Linear estimation, orthogonality conditions. Prediction and Wiener filtering. Model based signal processing: Linear signal models, AR-models. Spectral estimation.

Application of the above to simpler electrical engineering applications.

### Offering and execution

#### No offering selected

Select the semester and course offering above to get information from the correct course syllabus and course offering.

## Course information

### Content and learning outcomes

#### Course contents *

The course gives a broad overview of modeling using stochastic processes in electrical engineering applications. Formulating problems using mathematical modeling is an important part of the course.

Basics about continuous time an discrete time stochastic processes, especially weakly stationary processes. Definitions of probability distribution and density functions, statistical mean, mean power, variance, autocorrelation function, power spectral density,Gaussian processes and white noise. Linear filtering of stochastic processes.

Ergodicity: Estimation of statistical properties from measurements.

Sampling and reconstruction: Transformations between continuous and discrete time signals. Influence of sampling, sampling theorem. Pulse amplitude modulation. Errrors in the reconstruction of stochastic signals.

Estimation theory: Linear estimation, orthogonality conditions. Prediction and Wiener filtering. Model based signal processing: Linear signal models, AR-models. Spectral estimation.

Application of the above to simpler electrical engineering applications.

#### Intended learning outcomes *

After passing the course you should be able to

• Show a basic understanding of properties of stochastic processes.
• Analyze given problems in estimation or optimal filtering.
• Apply mathematical modeling tools to problems in electrical engineering.
• Show an understanding about sampling and reconstruction of weakly stationary stochastic processes.
• Develop simple software codes using, e.g., Matlab, and use this to simulate and analyze problems in the area. Report the methodology and results.
• Use a given mathematical model, or formulate one on your own, to solve a given technical problem in the area, analyze the result and justify if it is reasonable.

If you are passing the course with higher grades, you should, in addition to the above, be able to

• Show a good understanding about properties of stochastic processes.
• Analyze given problems in filtering, sampling and reconstruction of weakly stationary processes.
• Analyze given problems in estimation and optimal filtering.
• Formulate mathematical models which are applicable and relevant to a given problem formulation within the area. When vital information is missing, you should be able to judge and compare different possibilities as well as make reasonable assumptions to achieve a satisfactorily modeling performance.
• Use a given mathematical model, or one formulated by yourself, to solve a problem in the area; e.g., a problem composed of several interacting sub-problems or other problems requiring a more complex modeling, analyze the result and its validity.

#### Course Disposition

No information inserted

### Literature and preparations

#### Specific prerequisites *

For single course students: General admission requirements, 120 credits and documented proficiency in English B or equivalent

#### Recommended prerequisites

SF1901 Probability Theory and Statistics, or equivalent

EQ1110 Continuous time signals and systems, or equivalent

EQ1120 Discrete time signals and systems, or equivalent

#### Equipment

No information inserted

#### Literature

See course homepage.

### Examination and completion

A, B, C, D, E, FX, F

#### Examination *

• PRO1 - Project Work, 1.0 credits, Grading scale: P, F
• PRO2 - Project Work, 1.0 credits, Grading scale: P, F
• TEN1 - Exam, 4.0 credits, Grading scale: A, B, C, D, E, FX, F

Based on recommendation from KTH’s coordinator for disabilities, the examiner will decide how to adapt an examination for students with documented disability.

The examiner may apply another examination format when re-examining individual students.

#### Other requirements for final grade *

Passing grade in all parts of the examination.

#### Opportunity to complete the requirements via supplementary examination

No information inserted

#### Opportunity to raise an approved grade via renewed examination

No information inserted

### Further information

#### Course web

Further information about the course can be found on the Course web at the link below. Information on the Course web will later be moved to this site.

Course web EQ1270

#### Offered by

EECS/Intelligent Systems

Technology

#### Education cycle *

First cycle

EQ2300 Digital Signal Processing

EQ2310 Digital Communications

EQ2321 Speech and audio signal processing

EQ2330 Image and video processing

EQ2341 Pattern recognition and machine learning

#### Contact

Magnus Jansson (janssonm@kth.se)

#### Ethical approach *

• All members of a group are responsible for the group's work.
• In any assessment, every student shall honestly disclose any help received and sources used.
• In an oral assessment, every student shall be able to present and answer questions about the entire assignment and solution.

#### Supplementary information

In this course, the EECS code of honor applies, see:
http://www.kth.se/en/eecs/utbildning/hederskodex.