What is co-channel interference? Given the minimum distance between two co-channels D = 81 meters and Radius of a cell R = 3 me- ters, find the reuse factor of the networks.
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- For the microwave link shown below, what is the value of the free-space path loss if the operating frequency is 11.8 GHz? For the above microwave link, find the maximum allowed distance between the transmitter and the receiver to maintain the communication, if the transmitter antenna height is ht=30m and the receiver antenna height is hr=25 m.The data [0 1 0 0 0 1 0 1 1 1 0 0 1 1 1] is generated in an information signal with a speed of 64 kbit / s. This information mark [1 0 0 1 0 1] is transmitted using GPSK modulation with the spectrum code division multiple access (DSSS-CDMA) method, which is spread directly with the sequence, using the spreading sequence . 1- Show the bit sequence generated after spreading. 2- Show that the disseminated information can be retrieved at the receiver.In an asynchronous 8 bit transmission using a UART (8051), the crystal in use is 22.1184 MHz. The required Baud rate is 19200. What is the minimum time to transmit a packet containing 124 bytes? Give the answer in ms.
- A 1 Mbps link is used to transfer packets of each 10,000 bits long. This includes 500 bits header. If the channel is error free and 270 msec is the signal propagation time from the source to destination, obtain the efficiency for, (1) Stop and wait protocol. (i) Sliding window protocol with window size of 500. (iii) Sliding window protocol with window size of 10.An end station sends 135,200 bits into a Frame Relay network in 200 milliseconds. The CIR is 400,000 bits per second and the maximum transmission rate is 1.544 Mbps. A. Has the user exceeded the maximum transmission rate? (show your work, then answer yes or no)B. If every frame is exactly 50 octets long, how many of these frames will have the DE bit set to 1?What is the total delay (latency) for a frame of size 78 million bits that is being sent on a same link with 9 intermediate devices having a queuing time of 83 μs and a processing time of 93 μs? The length of the link is 2000 Km. The speed of carrier inside the link is 2.8 × 108 m/s
- A Wi-Fi station with one antenna is connected to an Access Point with a PHY rate of 65 Mbps. The channel is using 52 subcarriers, the coding rate is 1/2 and the symbol duration is configured for 4 microseconds. How many amplitude modulation levels are used by this radio?Statement is true/false with explanation. 1. When we send any signal over wireless channel for long distance, the signal doesn't loss any power 2. When the signal sent over a channel in digital formats, it means its baseband transmissionIn a full duplex communication by using UTP cable, Pr power is measured as 15 mw and Adb as 10,79 dB. If the received signal is correctly interpreted, which of the values are correct? a. maksimum Pc 15 mw NEXTdB : 0 ACRdB : 15,79 dB b. maksimum Pc: 5 mw NEXTdB : 10 dB ACRAB : 10,79 dB c. maksimum Pc 15 mw NEXT SB0 d8 ACRDB : 10.79 dB d. minimum Pc 12 mw NEXTdB : 7.78 dB ACCDB : 7,78 dB e minimum Pc: 5 mw NEXTdB: 10 dB ACRdB : 15,79 dB
- Determine the subnet mask for the following Network CIDR blocks. Provide the Base-2 conversion of the subnet. Network 201.13.56.0 197.122.0.0 CIDR Subnet Mask /28 /12 Octet1 Octet 2 Octet 3 Octet 4what is the throughput if the system produces the 1000 frames/sec then A pure ALOHA network transmits 200-bit frames on a shared channel of 200kbps.Computer A, B C, D and E is arranged in a ring topology. Calculate the propagation delay of sending one digital signal packet from Computer A to Computer E if the distance in each computer link is 2m.