Lab W5L5 (1)

telecommunications

Why SSB is preferred for transmission of good quality signal

Q4/ Why the performance of multimode graded index is better than multimode step index? Q5/ Design fiber optics communication system with analogue input and then measure the performance of the three types of fiber optics configurations. After that, answer the following questions: 1. Which configuration is the better? Comment! 2. Which parameters that improve the performance of multimode step index? Comment! 3. Which parameters that improve the performance of multimode graded index? Comment! 4. Which parameters that improve the performance of single mode step index? Comment! 5. If we need to increase the fiber length from 1 km to 15 km. which configuration is used? Comment!

Subject: Principles of Communication Systems

There are 3 sensor nodes. Every 1s, Node A transmits a very small packet to node B. Node C does not send or receive any data. Assume that B-MAC is used. A receiver wakes up every 250ms to sample the channel for 5ms. The transmission/reception/listening and sleep states draw 10mA and 0.1mA respectively. You can ignore the energy consumed by the transmission/reception of the data and ACK packets.  Calculate the average current drawn (in mA) by nodes A, B and C.

1) This  QUESTION FROM DIGITAL COMMUNICATIONS II course. just write for me  the the correct  answer.

Write a synopsis of JAD and RAD. Distinguish how they are different from conventional fact-finding techniques. In your opinion, what are the most significant benefits of team-based methods?

* You have been asked to create a subnet that supports 16 hosts. What subnet mask ?should you use .255.255.255.252 • 255.255.255.224 .255.255.255.240 • 255.255.255.248 * ?How does a switch differ from a hub • A switch does not induce any latency into the frame transfer time. • A switch decreases the number of broadcast domains. • A switch operates at a lower, more efficient layer of the OSI model. . switch tracks MAC addresses of directly- connected devices. Which OSI layer header contains the address of a destination host that is on ?another network • Network

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No plagarism please! Correct and detailed answer will be Upvoted else downvoted. Thank you!

Consider a CDMA system where transmitter A has the code 101010 and transmitter B has the code 111001. Assume that 1 is represented by +1V and 0 is represented by -1V. Show that the two CDMA codes (after mapping them to voltages) are orthogonal to each other. What is transmitted if A sends a bit of 0 and B sends a bit of 1? What did A and B most likely transmit if the received word is “-1 -1 -1 +1 +1 +1”?

Subject = signals and systems

Q4: Unseen operation in the same band as other types of wireless services, i.e. without interfering with those services, is a feature of what type of modulation technology? A. QAM B. FHSS C. GFSK D. 5G cellular E. A & B F. B & C G. B & D H. B & E I. D & E J. None of the above.

12. What type of coding is used to minimize data errors in the data transmission process?A. On-channelB. Channel3C. In bandD. Multiple access

Which of the following statements are appropriate for the SPI bus (select all that apply): SCLK is asserted by the Master. Any device can be ther Master, but not at the same time. There is no handshake between Master and Slave during a transfer. SPI is half duplex

1. Suppose two hosts A and B are connected via a router R. The A-R link has infinite bandwidth; the R-B link can send one packet per second. R's queue is infinite. Load is to be measured as the number of packets per second sent from A to R. Sketch the curves for throughput and delay, each as a function of load.

These multiple choice question from DIGITAL COMMUNICATIONS course.just write for me the final answer. 9) According to sampling theorem a. Ts is equal to 1/2fm b. Ts is lesser than 1/2fm c. Ts is greater than 1/2fm d. Ts is lesser than or equal to 1/2fm

Note: Please do not handwritten.

1) Assume that a circular cell has 57 channels and a cell radius of 10 km. The transmit power of the base station in this cell is 32 W. The path loss exponent in this cell is assumed to be 4. The grade of service is established to w be a probability of blocking of 5% (assuming blocked calls are cleared). Assume the average call length is two minutes, and each user averages two calls per hour. Further, assume the cell has just reached its maximum w m w m m capacity and must be split into four new microcells to provide four times the capacity in the same area. a) What is the curent user capacity of this cell? wwwm ww m w b) What is the radius and transmit power of the new cells? wwwwww wwwwwm www wwwwwwwwg vwww c) How many channels are needed in each of the new cells to maintain frequency reuse stability in the system? d) If traffic is uniformly distributed, what is the new traffic carried by each new cell? Will the probability of wwwww vww m vww vwwwww wv wwww wwww www wwm w blocking in…

i need the answer quickly

E- Design 3-to-8 decoder by using 2-to-4 decoders has active high enable.

b) Three stations share a 60 kbit/s ALOHA channel. The average bit rates transmitted from each of the three stations are 5 kbit/s, 8 kbit/s and 11 kbit/s. The length of each packet is 75 bits. i) Determine the normalized throughput of pure and slotted ALOHA. ii) Draw the general relationship between throughput and traffic for both pure and slotted ALOHA.

a) i. Distinguish between circuit and packet switching in communication system.     a) ii.  State two advantages and disadvantages of a circuit switching technique. a) iiiHow are messages or data in a packet switching techniques are routed to their destination. b) i. What are the modes of propagation in transmission  system? b) ii.  With the aid of sketch discuss one of the modes. What are the diversity techniques available in transmission network and discuss any two?

Q2: let the bandwidth of each channel is (136 Hz). the capacity of the whole communication system channels is (74.572) bit/s. the transmitted signal is (0.4x10^6) volts has an desirable noise signal of (200) volts. calculate: 1- total symbol rate of this communication system. 2- the signal to noise ratio in dB. 3- how many channels in * ?that system

Please answer quickly