525.718.81 - Multirate Signal Processing

Course Structure

The course materials are divided into modules. The Modules can be accessed by clicking Course Modules on the left menu. A module will have several sections including the overview, content, readings, discussions, and assignments. Students are encouraged to preview all sections of the module before starting. Most modules run for a period of seven (7) days, exceptions are noted on the Course Outline page. Students should regularly check the Calendar and Announcements for assignment due dates.

Course Topics

• Review of Discrete-Time Signal Processing
  
• IIR Filter Design, Part I
  
• IIR Filter Design, Part II
• FIR Filter Design, Part I
  
• FIR Filter Design, Part II
• Unsampling and Downsampling, Part I
  
• Unsampling and Downsampling, Part II
• Digital Filter Banks, Part I
  
• Digital Filter Banks, Part II
• Digital Filter Banks, Part III
• CIC Filters
  
• Applications of Digital Filters
  

Course Goals

To master the fundamentals of multirate signal processing and demonstrate the ability to solve problems in sample rate conversion, filter design, filter bank and transmultiplexer design.

Course Learning Outcomes (CLOs)

• Design and implement Finite Impulse Response (FIR) and Infinite Impulse Response (IIR) digital filters to meet specifications
• Create efficient realizations for upsampling and downsampling of signals using the polyphase decomposition
• Design digital filter banks based on the techniques presented
• Design half-band filters based on the techniques presented
• Describe the advantages and disadvantages of cascade-integrator-comb (CIC) filters. Design CIC filters to meet specifications.
• Utilize MATLAB for signal analysis and digital filter design.

Textbooks

None required.

Required Software

MATLAB software by MathWorks is required and the version must be equivalent to the latest Student Version, which includes the Signal Processing Toolbox and the DSP System Toolbox. Also, the Fixed-Point Designer is required. If you are using the student version this requires the purchase of one add-on.

Student Coursework Requirements

It is expected that each module will take approximately 10–20 hours per week to complete. Here is an approximate breakdown: reading the reference papers (approximately 4–5 hours per week) as well as some outside reading, listening to the audio annotated slide presentations (approximately 2–3 hours per week), and homework assignments (approximately 5–10 hours per week).

This course has the following requirements:

1. Preparation and Participation (Module Discussions) (15% of Final Grade Calculation)

Each student is responsible for carefully reading all assigned material and being prepared for discussion.

Post your initial response to the discussion questions by the evening of day 3 for that module week. Posting a response to the discussion question is part one of your grade for module discussions (i.e., Timeliness).

Part two of your grade for module discussion is your interaction (i.e., responding to classmate postings with thoughtful responses) with at least two classmates (i.e., Critical Thinking). Just posting your response to a discussion question is not sufficient; we want you to interact with your classmates. Be detailed in your postings and in your responses to your classmates' postings. Feel free to agree or disagree with your classmates. Please ensure that your postings are civil and constructive.

The discussion forum is primarily intended for student interaction. However, Dr. Younkins will monitor module discussions and respond as appropriate.

Evaluation of preparation and participation is based on contribution to discussions.

Preparation and participation is evaluated by the following grading elements:

1. Timeliness (50%)
2. Critical Thinking (50%)

Preparation and participation is graded as follows:

100–90(A)—Timeliness [regularly participates; all required postings; early in discussion; throughout the discussion]; Critical Thinking [rich in content; full of thoughts, insight, and analysis].

89–80(B)—Timeliness [frequently participates; all required postings; some not in time for others to read and respond]; Critical Thinking [substantial information; thought, insight, and analysis has taken place].

79–70(C)—Timeliness [infrequently participates; all required postings; most at the last minute without allowing for response time]; Critical Thinking [generally competent; information is thin and commonplace].

<70(F)—Timeliness [rarely participates; some, or all required postings missing]; Critical Thinking [rudimentary and superficial; no analysis or insight is displayed].

2. Homework Assignments (35% of Final Grade Calculation)

Homework is assigned for Modules 1-7 and Modules 9-13.

You are to submit your homework as a single PDF file. Please use the instructor-supplied template as a guide for completing your homework write-up. Any MATLAB code or Simulink models used to solve homework problems should be included in the PDF documentation. Homework is expected to be documented with sufficient clarity and completeness such that a reader with a technical background, but not necessarily familiar with the subject matter, could reproduce the solution. Most students find it convenient to first prepare their homework using a word processor similar to Microsoft Word. This includes cutting and pasting results from MATLAB and Simulink simulations. Also, it is important to be able insert and edit equations in the word processor document. Finally, after the student is happy with their documentation they can then convert it to an PDF file and submit it in Canvas. All homework assignments are required to be typewritten, including any equations.

Please use the following naming convention when submitting your homework assignments in PDF format: If your last name is "Jones" and you are submitting homework assignment 1, please name your submitted PDF file: JONES_HW1.pdf. When student Jones submits his/her midterm it will be named JONES_MIDTERM.pdf. Please let me know if you have questions about this.

All homework assignments are due according to the dates in the Calendar.

Late submissions will not be accepted without prior agreement from the instructor. If you have a planned absence that will impact your ability to submit the homework on time, please contact me as soon as possible to arrange a new due date.

Homework assignments will be evaluated using the following grading elements:

1. Each part of question is answered (20%)
2. All assumptions are clearly stated (10%)
3. Intermediate derivations and calculations are provided (20%)
4. Technical correctness (30%)
5. Answer is clearly indicated (10%)
6. Answer precision and units are appropriate (10%)

Homework will be graded as follows:

90–100(A)—All parts of question are addressed; all assumptions are clearly stated, intermediate derivations and calculations are provided, the answer is technically correct, the answer is clearly indicated, the answer precision and units are appropriate.

80–89(B)—All parts of question are addressed; all assumptions are stated, some intermediate derivations and calculations are provided, the answer is technically correct, the answer is indicated, the answer precision and units are appropriate.

70–79(C)—Majority of parts of question are addressed; assumptions are partially stated, few intermediate derivations and calculations are provided, the answer is not technically correct, the answer is indicated, the answer precision and units are indicated but inappropriate.

<70(F)—Some parts of question are addressed; assumptions are not stated, intermediate derivations and calculations are not provided, answer is missing or incorrect, answer precision is inappropriate and units are missing.

3. Midterm and Final Exams (25% each of Final Grade Calculation)

The midterm exam will be available in Module 8 and the final exam will be available in the next-to-last Module. Both exams will be time-limited with a duration specified by the instructor. Students may use any reference papers supplied by the instructor as well as MATLAB/Simulink to complete the exam.

Exams will be evaluated using the following grading elements:

1. Each part of question is answered (20%)
2. All assumptions are clearly stated (10%)
3. Intermediate derivations and calculations are provided (20%)
4. Technical correctness (30%)
5. Answer is clearly indicated (10%)
6. Answer precision and units are appropriate (10%)

Exams will be graded as follows:

90–100(A)—All parts of question are addressed; all assumptions are clearly stated, intermediate derivations and calculations are provided, the answer is technically correct, the answer is clearly indicated, the answer precision and units are appropriate.

80–89(B)—All parts of question are addressed; all assumptions are stated, some intermediate derivations and calculations are provided, the answer is technically correct, the answer is indicated, the answer precision and units are appropriate.

70–79(C)—Majority of parts of question are addressed; assumptions are partially stated, few intermediate derivations and calculations are provided, the answer is not technically correct, the answer is indicated, the answer precision and units are indicated but inappropriate.

<70(F)—Some parts of question are addressed; assumptions are not stated, intermediate derivations and calculations are not provided, answer is missing or incorrect, answer precision is inappropriate and units are missing.

The student may not collaborate with any other individuals on the exam. The student is responsible for finding a suitable time period during the exam period within which to finish the exam. Late submissions for the midterm and final exams will not be accepted.

All exam submissions are required to be typewritten, including any equations.

Grading Policy

Please see the above section for details on grading for course homework, exams and discussion forum participation.

Course Policies

Personal Wellbeing

If you are struggling with anxiety, stress, depression or other mental health related concerns, please consider connecting with the Johns Hopkins Student Assistance Program (JHSAP). If you are concerned about a friend, please encourage that person to seek out our services. JHSAP can be reached at 443-287-7000 or https://jhsap.org/

Tutoring Website

Johns Hopkins Engineering for Professionals offers a tutoring connection network that allows students to connect with other Johns Hopkins Engineering students or alumni for tutoring services. This service allows students to search a list of courses to “Find a Tutor” or complete a profile to “Become a Tutor.” More information about this service can be found on the tutoring website (https://tutor.ep.jhu.edu/).

Academic Policies

Deadlines for Adding, Dropping and Withdrawing from Courses

Students may add a course up to one week after the start of the term for that particular course. Students may drop courses according to the drop deadlines outlined in the EP academic calendar (https://ep.jhu.edu/student-services/academic-calendar/). Between the 6th week of the class and prior to the final withdrawal deadline, a student may withdraw from a course with a W on their academic record. A record of the course will remain on the academic record with a W appearing in the grade column to indicate that the student registered and withdrew from the course.

Academic Misconduct Policy

All students are required to read, know, and comply with the Johns Hopkins University Krieger School of Arts and Sciences (KSAS) / Whiting School of Engineering (WSE) Procedures for Handling Allegations of Misconduct by Full-Time and Part-Time Graduate Students.

This policy prohibits academic misconduct, including but not limited to the following: cheating or facilitating cheating; plagiarism; reuse of assignments; unauthorized collaboration; alteration of graded assignments; and unfair competition. Course materials (old assignments, texts, or examinations, etc.) should not be shared unless authorized by the course instructor. Any questions related to this policy should be directed to EP’s academic integrity officer at ep-academic-integrity@jhu.edu.

Students with Disabilities - Accommodations and Accessibility

Johns Hopkins University values diversity and inclusion. We are committed to providing welcoming, equitable, and accessible educational experiences for all students. Students with disabilities (including those with psychological conditions, medical conditions and temporary disabilities) can request accommodations for this course by providing an Accommodation Letter issued by Student Disability Services (SDS). Please request accommodations for this course as early as possible to provide time for effective communication and arrangements.

For further information or to start the process of requesting accommodations, please contact Student Disability Services at Engineering for Professionals, ep-disability-svcs@jhu.edu.

Student Conduct Code

The fundamental purpose of the JHU regulation of student conduct is to promote and to protect the health, safety, welfare, property, and rights of all members of the University community as well as to promote the orderly operation of the University and to safeguard its property and facilities. As members of the University community, students accept certain responsibilities which support the educational mission and create an environment in which all students are afforded the same opportunity to succeed academically. 

For a full description of the code please visit the following website: https://studentaffairs.jhu.edu/policies-guidelines/student-code/

Classroom Climate

JHU is committed to creating a classroom environment that values the diversity of experiences and perspectives that all students bring. Everyone has the right to be treated with dignity and respect. Fostering an inclusive climate is important. Research and experience show that students who interact with peers who are different from themselves learn new things and experience tangible educational outcomes. At no time in this learning process should someone be singled out or treated unequally on the basis of any seen or unseen part of their identity. 
 
If you have concerns in this course about harassment, discrimination, or any unequal treatment, or if you seek accommodations or resources, please reach out to the course instructor directly. Reporting will never impact your course grade. You may also share concerns with your program chair, the Assistant Dean for Diversity and Inclusion, or the Office of Institutional Equity. In handling reports, people will protect your privacy as much as possible, but faculty and staff are required to officially report information for some cases (e.g. sexual harassment).

Course Auditing

When a student enrolls in an EP course with “audit” status, the student must reach an understanding with the instructor as to what is required to earn the “audit.” If the student does not meet those expectations, the instructor must notify the EP Registration Team [EP-Registration@exchange.johnshopkins.edu] in order for the student to be retroactively dropped or withdrawn from the course (depending on when the "audit" was requested and in accordance with EP registration deadlines). All lecture content will remain accessible to auditing students, but access to all other course material is left to the discretion of the instructor.