Wireless Communication MCQ Questions Answers

Wireless Communication:

Wireless communication is the process of transmitting and receiving information between two or more devices without using physical cables. This can be done through a number of methods, including radio frequencies, infrared signals, and Bluetooth® technology.

What is mobile communication?

Mobile communication is a type of wireless communication that allows devices to communicate with each other without being connected to a physical network. This can be done through radio frequency waves or satellite signals. A cellular network or cellular networks are an example of mobile communication. These allow phones to connect to the internet and make calls without being connected to a landline. There are also mobile radio applications that allow you to listen to the radio on your mobile phone.

What are voice channels?

Voice channels are a communication path for carrying human speech, usually carried on the Public Switched Telephone Network (PSTN). Originally, each telephone circuit was an individual channel. However, with the advent of digital transmission, multiplexing techniques allow a finite number of telephone circuits to share a single physical link, typically using time-division multiplexing. This allows a greater number of simultaneous telephone conversations to take place on a single wire pair, at the expense of each conversation requiring a longer time slot on the wire. 

Dynamic channel assignment strategy (DCA):

A dynamic channel assignment strategy (DCA) is a technique used by wireless networks or wireless systems to optimize the use of available channels. The goal of a DCA strategy is to ensure that each client has an adequate amount of bandwidth and that no two clients are using the same channel at the same time.

What is a fixed channel assignment strategy?

Fixed channel assignment strategy is a wireless communication or wireless system technique in which a dedicated channel is permanently assigned to a specific mobile user or device. This approach helps ensure consistent and reliable performance by eliminating the potential for interference from other users. It also allows for more efficient use of available bandwidth, as there is no need to continually re-negotiate channels. Fixed channel assignment is commonly used in industrial and military settings, where guaranteed performance is essential.

What do you know about the cellular system?

Cellular communications or mobile communications is a type of wireless communication that uses a cellular network or cellular networks to connect devices. Cellular systems are divided into two categories: 2G and 3G. 2G networks were the first generation of cellular systems and were introduced in the early 1990s. They used analog signals to transmit data, which limited their bandwidth and speeds. 3G networks were introduced in the early 2000s and use digital signals to transmit data. This allows them to transmit more data at higher speeds.

Channel assignment:

Channel assignment is the process of allocating channels to wireless devices in a network. In order to minimize interference and optimize performance, each device must be assigned a channel that is unused by other devices. The process of channel assignment can be difficult, as there are only a limited number of available channels and many devices competing for them.

Dynamic Channel Assignment? 

Dynamic channel assignment is a technique used in wireless communication systems to optimize the use of available channels. Dynamic Channel assignment assigns channels to devices on the fly, as needed, in order to ensure that the most efficient use of the available spectrum is made. This helps to prevent overcrowding and keep traffic flowing smoothly.

Digital European Cordless Telephone:

Digital European Cordless Telephone (DECT) is the name for a digital telephone system that uses the 1.9 GHz, frequency band. It is a global standard, originally proposed in 1992 by the European Telecommunications Standards Institute (ETSI). DECT phones are interoperable and can be used anywhere in the world.

What is channel allocation?

Channel allocation is the process of allocating radio frequency channels to devices in a wireless network. This is done to ensure that each device has access to a channel that is not being used by another device and that the network can operate at its full capacity.

What do you mean by the term "radio spectrum"?

Radio spectrum is the term used to describe the range of frequencies that are available for use by radio communications systems. The radio spectrum is divided into a number of frequency bands, each of which is allocated for a specific type of service.

What is spectrum efficiency?

Spectrum efficiency is a measure of how efficiently a wireless communication system uses its available frequency spectrum. It is typically expressed in terms of bits per second (bps) per hertz (Hz) or bytes per second (Bps) per Hertz. For example, a system that can transmit 1,000 bps over a 1 Hz channel is more spectrum efficient than a system that can transmit only 100 bps over the same channel.

What are multiple access techniques?

There are a few different access techniques that can be used for wireless communication. One such technique is called "carrier sense multiple access with collision detection" or CSMA/CD. Multiple Access Technique allows devices to share the bandwidth equally, and if two devices try to send data at the same time, it will result in a collision. The devices will then wait a certain amount of time before trying to send data again.

What do you mean by radio coverage?

Radio coverage, or the lack thereof, is a common term used in telecommunications. It refers to the area within which radio signals can be received reliably. The strength of a signal diminishes with distance from the source (radio coverage), so the greater the distance between the transmitter and receiver, the weaker the signal. Radio coverage maps show the areas within a particular geographic region where a radio signal is likely to be received at a strength above a certain threshold.

When was the cellular concept came in?

The cellular concept came about in 1947 when AT&T Bell Labs developed the first system. This system used frequencies that were divided into three bands: low, medium, and high. Each band was allocated for a specific type of traffic: voice, data, or video. This original cellular system was called the Advanced Mobile Phone System (AMPS).

Time Division Multiple Access:

TDMA is a technique for sharing a communication channel by dividing it into time slots. Each user is assigned a specific timeslot in which to transmit. This allows multiple users to share the same frequency without interfering with each other. TDMA is used in digital cellular systems, such as GSM and CDMA2000.

What is adjacent channel interference?

When two signals, close in frequency to one another, cause interference is channel interference. This type of interference can be reduced by using an antenna with a higher gain. By increasing the distance between the two signals, you can also reduce the amount of adjacent channel interference.

What is a frequency channel?

A frequency channel is a range of frequencies that are used for transmitting signals between two points. The frequency channel is divided into bands, which are designated by their center frequencies. When selecting a frequency channel, you need to ensure that the band your transmitter is using does not overlap with the band your receiver is using. Otherwise, the signals will interfere with each other and the communication will not be effective.

What do you mean by the term assigned channels?

In a wireless communication system, the term assigned channels refer to the specific frequencies or wavelengths that have been set aside for use by that system. These channels are typically designated by the manufacturer of the equipment and must be used in order to ensure compatibility between devices. When setting up a new network, it is important to make sure that all of the devices are using the same assigned channels in order to minimize interference.

What is cell splitting?

It is a technique that allows wireless carriers to add new cell sites without having to acquire a new spectrum. By splitting an existing large cell into two or smaller cells, the carrier can reuse the same frequency range on each of the smaller cells. This increases the capacity of the network without requiring any additional spectrum licenses.

What is a base station?

A base station is a facility that enables wireless communication between devices. A base station may be used for cellular telephone service, wireless internet, or other purposes. The base station is typically housed in a large building or tower, and it includes equipment that allows the transmission and reception of signals.

What do you mean by the desired signal?

It is a specific type of signal that a user wants to receive. This could be a voice call, text message, or email. By adjusting the settings on your phone, you can ensure that you are getting the best possible signal for your needs.

Power Density:

Power density is a measure of how much power is transmitted by an antenna in a given area. It is typically expressed in watts per square meter (W/m2).

What do you know about the cellular region?

The cellular region is the area of the country where a particular cellular carrier has service. Many people think about this in terms of large metropolitan areas, like Los Angeles or New York City. But there are also rural areas that have only one or two cellular carriers. If you travel outside of your home area and try to use your phone, you may not be able to get service because it may not be in the coverage of the cellular region.

What is a modulation technique?

It is a signal processing method used to change some property of a periodic waveform, called the carrier signal, in order to transmit information. The modulation technique employed in a particular system depends on the nature of the information to be transmitted and the available transmission media.

What is a frequency domain?

It is a representation of a signal in terms of its constituent frequencies and their amplitudes. It can be used to analyze the behavior of signals in time or to characterize the spectral content of signals.

What is radio capacity?

Radio capacity is the maximum number of bits per second that a channel can carry. The higher the radio capacity, the more information can be transmitted in a given period of time. The amount of data that can be carried over a wireless network depends on the type of modulation used, the signal-to-noise ratio, and other factors.

What is signal strength?

The signal strength of a wireless network is the power level of the signal being emitted by the transmitter. The higher the strength, the better the quality of the connection will be. In general, a signal strength of -70 dBm or above is considered good enough for most applications. However, if you are in an area with a lot of interference, you may need strength of -50 dBm or higher to get a decent connection.

Channel Coding:

It is a technique used in telecommunications to improve the performance of communication systems. It is used to protect information from being corrupted during transmission. Channel coding inserts bits into the data stream that are used to correct errors that may occur during transmission. In addition, it can also be used to detect and correct errors that have already occurred.

What is coherence bandwidth?

It is the range of frequencies over which two or more waves remain in step, or in phase with each other. This occurs when the waves have the same frequency, wavelength, and amplitude. Coherence is often used to measure the performance of a wireless communication system, as it determines how much data can be transmitted simultaneously without interference. In general, the higher the bandwidth, the better the system performance.

What are traffic channels?

These channels are communication channels used by devices in a wireless network to send and receive traffic. Traffic can include voice, data, or other information.

There are a limited number of channels available in any given wireless network. In order to maximize the use of these channels, each device must share the available bandwidth fairly.

What is a predetermined algorithm?

A predetermined algorithm is a pre-determined set of instructions or steps that need to be followed in order to complete a task. This type of algorithm is often used in wireless communication, as it allows devices to send and receive data in an efficient and reliable manner. By using a predetermined algorithm, devices are able to communicate with each other without any errors.

What are radio waves?

These waves are electromagnetic radiation that travels through the air. They are created when an electric current flows through a conductor, such as a wire, and creates an oscillating magnetic field. This field then radiates outwards in all directions and can be picked up by antennas to carry information. These waves have a wide range of frequencies, from very low (3 kHz) to very high (300 GHz).

What are RF channels?

Radiofrequency (RF) channels are frequency ranges within which certain types of wireless communication take place. RF channels are typically used for cellular telephone transmissions and other types of wireless communication. The Federal Communications Commission (FCC) has designated certain frequency ranges as RF channels in order to regulate their use.

What is frequency reuse?

Frequency reuse is the allocation of a specific frequency band to more than one cell phone transmitter. By doing this, the same frequencies can be used in different cells, which helps to conserve bandwidth and extend the life of the wireless spectrum. Frequency reuse is also known as frequency planning or frequency allocation. It is an important part of cellular network planning and optimization.

What are serving base station requests?

A serving base station request is the packets that are sent to a mobile device from the network. These packets request information from the device, such as its location or status. The serving base station is responsible for handling all communication between the mobile device and the network.

What is a cell site? 

A cell site, or base station, is a telecommunications facility that provides radio coverage for a specific geographic area. Cells are created by dividing a geographic area into smaller areas called cells, each served by its own cell site. Cell sites are typically mounted on towers, poles, or other elevated structures.

Quizack arranged Wireless Communication Quiz and PDF:

A Wireless Communication MCQs test was also prepared by the Quizack team. So, if you feel like you've had enough practice or want to see how much you've learned, you may take the exam. However, you should be aware that Quizack's online Wireless Communication questions are the most up-to-date and difficult. Our database is also kept up to date. Quizack's online Wireless Communication quiz is always available.

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