k 1. What does an amplifier do and why is one needed in a radio system? [3 marks]

Question 4 needs to be a ppt Assignment 1 Value: 16% Due date: 22-Aug-2016 Return date: 13-Sep-2016 Submission method options Alternative submission method Task 1. What does an amplifier do and why is one needed in a radio system? [3 marks] 2. What is the purpose of a mixer? Include a discussion of sidebands in your answer. [3 marks] 3. Compare and contrast the multiplexing techniques CDMA and FDMA in the area of wireless networking? [4 marks] 4. A local engineering group ask you to present the merits of different antenna, such as yagi, horn, and cellular antennas. Research these technologies in details and pay specific attention to how they are used as well their strengths and weakness. Provide an opinion regarding which antenna types will become the dominant players in the future of medium- and long-distance wireless links. Please submit power point slides in your answer. [6 marks] Rationale Your task in this assessment is to prepare a response to each of the questions. Please refer to the marking guide when preparing your response to see what criteria and standards will be used to assess your work and your progress towards Learning Outcomes 1, 2 and 4. Marking criteria Marks will be given using the following criteria correctness and completeness of the answers; inclusion of appropriate figures, where applicable; clarity of explanation; correctness of spelling, grammar, and format of the submission; sufficient references and use of APA referencing style The following rubrics will be used to mark assignment 1: Question HD (85%-10%) DI (75% - 84%) CR (65% - 74%) PS (50% - 64%) Q 1 – Q 3 Maximum marks 10 Learning Outcome 1, 2 The answer is correct, and complete. Comprehensive explanation is provided. Figures (if appropriate) were used. Appropriate examples are used. No grammatical or spelling mistake. The answer is correct and a detailed explanation is provided. References are used. No/only a few grammatical or spelling mistakes. The answer is correct, but the explanation is not complete. Very few references are used and not formatted appropriately. The answer is correct but not complete and only adequate explanation is provided. No references are used. There are grammatical errors and spelling mistakes. Q 4 Maximum marks 4 Learning Outcome 4 The answer is correct, and complete. All possibilities were considered using appropriate assumptions. Comprehensive explanation is provided with appropriate reference. No grammatical or spelling mistake. The answers were correct, detailed explanation were given with the omission of few possibilities and assumptions. The answers are partly correct. only considered from one point of view. Presentation Please write the answers in a word document and submit it via EASTS. Use Times new roman/Palatino Linotype/Calibri/Cambria/Arial fonts using 10 to 12 font size. Requirements Question 1 to 3: 300 - 600 words for each question; Question 4: Submit a ppt. APA reference style should be used in the assignment. APA referencing guide can be found


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