A hexagonal cell within a 4-cell system has a radius of 1.387 km. A total of 60 channels are used within the entire system. If the load per user is 0.029 Erlangs, and λ = 1 call/hour, compute the following for an Erlang C system that has a 5% probability of a delayed call: (a) How many users per square kilometer will this system support? (a) What is the probability that a delayed call will have to wait for more than 10 s? (c) What is the probability that a call will be delayed for more than 10 seconds?

A hexagonal cell within a 4-cell system has a radius of 1.387 km. A total of 60 channels are used within the entire system. If the load per user is 0.029 Erlangs, and λ = 1 call/hour, compute the following for an Erlang C system that has a 5% probability of a delayed call: (a) How many users per square kilometer will this system support? (a) What is the probability that a delayed call will have to wait for more than 10 s? (c) What is the probability that a call will be delayed for more than 10 seconds?

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

"A transmission line with negligible attenuation has L = 0.1 uH/ft and C = 0.2 nF/ft and is typically operated at 100 MHz. What is the velocity of propagation (in 10^8 m/s) of the signal along this line? Enter only the numerical value. No need for the unit. Use four decimal places (if the answer is not an integer). For example, the calculated value is 3x10^8 m/s, then enter 3."
Q / Consider a cellular system with 500 total allocated voice channel frequencies. Calculate the mean S/I ratio for cell reuse factor equal to 4,7, and 12. Assume omnidirectional antennas with six interferers in the first tier and a slope for path loss (γ = 4). Discuss the results
If a total of 33 MHz is allocated to a particular FDD cellular telephone system which uses two 25 KHz simplex channels to provide full duplex voice and control channels, compute the number of channels available per cell if a system usesa) 4-cell reuse, b) 7-cell reuse, and c) 12 – cell reuse. If 1 MHz of the spectrum is reserved for control channels, determine an equal distribution of control and voice channels for all the three cases. [
A. If Satellite with a radius of 5.3m trans mitted a message at the frequency of 1.3 MHz to earth station. Determine;i. The wavelength, and time, in hour of the transmissionii. The centrifugal force of the satelliteiii. The attenuation of the transmission B. The wavelength of a signal transmitted at 1000MS-1 is 700M. Determine the period of the transmissionC. Analyze the conditions that can lead to satellite path diversityD. Explain handoff and discuss three types of satellite handoff
2. A system is being designed to use a 30 GHZ link with a 300HZ bandwidth to receive signals from a navigation spacecraft at an altitude of 20,200km, with a maximum slant range of 24,700km. The satellite transmitter-antenna gain is 25db and the handheld unit receiver gain is 5db. The transmitter power will be 18W. If the handheld receiver temperature is 500K, will this be an effective link (S/N at least 10 or 10db)? If not, what could you change to improve the link?
A receiver in an urban cellular radio system detects a 1 mW signal at d = ? ? = 1 meter from the transmitter. In order to mitigate co-channel interference effects, it is required that the signal received at any base station receiver from another base station transmitter which operates with the same channel must be below -100 dBm. A measurement team has determined that the average path loss exponent in the system is n = 3. Determine the major radius of each cell if a 7-cell reuse pattern is used. What is the major radius if a 4-cell reuse pattern is used?
Multiple Choice directions: Circle the letter of the answers 7. This is a special microwave coaxial cable used in the lower microwave bands L, S, and C. a. Flexible coaxial b. All of the above c. Hard line cable d. Braided coaxial 8. The practical microwave region is in the vicinity of a. 1-10 GHz b. 1-20 GHz c. 1-300 GHz d. 1-30 GHz 9. In a hybrid ring, if the signal is applied at port 1, which port has no output? a. 3 b. 2 c. 1 d. 4 Note: Explanation is not needed just provide the correct answers for each number.
A) The effective aperture of a 144.0cm-diameter parabolic reflector antenna is 6m of the physical aperture area. Compute the gain in dB at 10GHz. b) Vodafone decides to use a digital TDMA scheme that can tolerate a Signal-to-Interference Ratio of 17dB in the worst case. Find the optimal value of the path lost exponent for an omnidirectional antenna; assuming i=3 and j=2. Assume that there are six co-channel cells in the first tier, and all of them are at same distance from the mobile. Use suitable approximations. c) Draw the table of frequency assignments and system layouts for a seven-cell repeat pattern and three-sectored antenna per cell site, using E-GSM 900MHz in which the total number of channels needs to be divided, assuming that the full spectrum is available from the operator of the system is used. In the sixth (6th) cluster, list all the possible channels that will be assigned to the cells in sector B?
. Suppose two hosts A and B, are separated by 10,000 kilometers and are connected by a directlink of R = 1 Mbps. Suppose the propagation speed over the link is 2.5 x 108 meters/sec.a. Calculate the "bandwidth-delay product", R.tprop.b. Consider sending a file of 400,000 bits from host A to B. Suppose the file is sent continuouslyas one big message. What is the maximum number of bits that will be in the link at any giventime?c. Provide an interpretation of the bandwidth-delay product.d. What is the width (in meters) of bit in the link? Is it longer than a football field?e. Derive a general expression for the width of a bit in terms of the propagation speed s, thebandwidth R, and the length of the link d
A microwave link includes two sites that are 10 km apart and uses a center frequency of 9 GHz. On either transmitter or receiver side, a 100-m transmission line that has an attenuation per unit length of 0.01 dB/m is connected to an amplifier and a parabolic reflector antenna. Other losses caused by connectors and insertions incurred on one side amounts to 3 dB. Antenna has a power gain of 20 dB. If the output of the transmitter amplifier is 30 dBm, what is the received signal level (in dBm) at the input of the receiver amplifier?
1.) A communication system is defined below:Transmitter Power: = 45 dBm; Frequency = 1 GHzTransmit Antenna: Gain = 12 dB, height above ground = 50 meters;Receive Antenna: Gain = 6 dB, height above ground= 2.5 metersFind the received power (in dBm) at a range of 4 kilometers:a. using the free-space range equation b. using the near-earth range equation Using the results of the calculations in a & b above: c. determine the best prediction of the received power (in dBm) at the 4 kilometer range. answer should be a) -41.15 b) -39.1 c.) near FS
The radar antenna, which is used as both transmitter and receiver, is at the operating frequency of 5GHz. It has a gain of 150 (dimensionless). The antenna emits 100kW of power and 3m2 at 1km for maximum directional radiation and reception a radar cross-sectional area of is aligned with the target. The received signal is polarization compatible with the emitted signal.Find the received power.