We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Digital communication schemes + AWGN channel - Research Paper Example

Comments (0) Cite this document
DIGITAL COMMUNICATION SCHEMES + AWGN CHANNEL CONTENTS Number Topic Pages 1 Introduction to digital modulation schemes 1 2 Quadrature Phase Shift Key Modulation (QPSK) 2-3 3 Quadrature Amplitude Modulation (QAM) 3-4 4 Orthogonal frequency-division multiplexing (OFDM) 4-6 5 AWGN channel 6-7 Bibliography 8 Introduction The purpose of digital modulation schemes is collaborated with digital communication which is to convey digital information between two or more destinations…
Download paper
Digital communication schemes + AWGN channel
Read TextPreview

Extract of sample
Digital communication schemes + AWGN channel

In digital modulation, an analog transporter signal is adjusted with a digital information flow. Digital modulation techniques can be enumerated as digital-to-analog conversion, and the corresponding demodulation or detection as analog-to-digital conversion. The most essential digital modulation schemes are found on keying, that are PSK, FSK, ASK and QAM. In the subject of PSK; acronym of phase-shift keying, a finite number of phases are used. In the matter of FSK; short form of frequency-shift keying; a finite number of frequencies are used. In the topic of ASK; abbreviation of amplitude-shift keying, a finite number of amplitudes are used. In the area of QAM; meaning Quadrature amplitude modulation; a finite number of at least two phases and at least two amplitudes are used. An instrument that executes modulation is recognized as a modulator and an appliance that executes the converse process of modulation is identified as a demodulator, at times it is also called as detector. An electronic tool that can do both processes is a modem; ‘mod’ means modulator and ‘dem’ means demodulator. 1. Quadrature Phase Shift Key Modulation (QPSK) Phase-shift keying is a digital modulation method that transmits information by altering the phase of an oriented signal called as the carrier wave. QPSK is recognized in different notations as quaternary PSK also as quadriphase PSK or 4-PSK. QPSK utilizes four spots on the assemblage figure, at equal arc interval around a circle. With quadrangle points, QPSK can program twice bits per symbol, as revealed in the figure with gray convention to lessen the bit inaccuracy or error rate also known as BER. The numerical investigation demonstrates that QPSK can be utilized also to make twice the information flow rate evaluated with a Binary phase-shift keying (BPSK scheme, a type of PSK) while preserving the identical bandwidth of the pulses. In other words it can be said that QPSK, in order to keep up with the information flow rate of BPSK, reduces half the bandwidth requirement as in the case of BPSK. In this issue of QPSK, the BER (bit inaccuracy rate) of QPSK is precisely alike as the BER of BPSK modulation scheme. The numeric execution of QPSK is further wide-ranging as compare to BPSK and also specifies the execution of advanced order PSK. In scripting the mathematical code in the group drawing in language of the sine and cosine waves utilized to broadcast them is as under: The above equation will convey the quadrangle points, as it is desirable in QPSK, the phases will be at one forth ‘?’ at corresponding value of n = 1, three by forth ‘?’ at corresponding value of n = 2, five by forth ‘?’ at corresponding value of n = 3, and seven by forth ‘?’ at corresponding value of n = 4. Where ‘fc’ is the carrier frequency and ‘n’ is the phase value. 2. Quadrature Amplitude Modulation (QAM) Quadrature amplitude modulation abbreviated as QAM is mutually an analog plus a digital modulation method. It communicates two analog communication pulses, or in an analogous approach two digital bits flow. QAM does so by altering the amplitudes of two transporter ... Read More
Cite this document
  • APA
  • MLA
(“Digital communication schemes AWGN channel Research Paper”, n.d.)
Retrieved from https://studentshare.net/engineering-and-construction/33750-digital-communication-schemes-awgn-channel
(Digital Communication Schemes AWGN Channel Research Paper)
“Digital Communication Schemes AWGN Channel Research Paper”, n.d. https://studentshare.net/engineering-and-construction/33750-digital-communication-schemes-awgn-channel.
  • Cited: 0 times
Comments (0)
Click to create a comment
Online learning has made learning possible anytime, anywhere. The flexibility that this new age learning technology provides has made possible for anyone to acquire expertise in multi-disciplinary areas. So an HR executive can very well be a graphic designer or a software programmer.
6 Pages(1500 words)Research Paper
Digital Audio
Several research and development processes were initiated which finally ushered in the digital age of audio. There were earlier attempts as well. Since the invention of audio recording and playback systems, human beings always strove to create a system which is more accurate and efficient.
5 Pages(1250 words)Research Paper
Ponzi and Pyramid Schemes
However, all the forms of these schemes share one common characteristic and that is, they all assure customers or investors big profit based on recruiting others to join their plan, instead of generating profits from some genuine deal or trade of products.
4 Pages(1000 words)Research Paper
Local channel San antonio TX, channel 5
The news generally focused on the family, crime and sports. The first segment of the news focused on the family and then went on to crimes committed by certain people during the day. The sports focused on the NFL teams that were yet to play and were preparing for their matches.
4 Pages(1000 words)Research Paper
Digital Communication
This paper is divided into five sections, in the first section executive summary is given, then in the second section digital communication and T1 are briefly discussed. In the third section, elaborated history of digital communication and T1 is given then further in the forth section, Digital communication in today's world in discussed and finally in the last section conclusion is given.
10 Pages(2500 words)Research Paper
Digital camera
Now the market has got a wide range of digital cameras to choose from. A number of reputed brands with a range of features are available in the market. Therefore, while going for a purchase of a camera, it often becomes quite confusing which one should we
4 Pages(1000 words)Research Paper
Digital communication schemes + AWGN channel
This is executed in real schemes with a modulation technique at the conveying point to compel the substantial conversion at the deliverance and a demodulation technique at the receiving end to sense the
6 Pages(1500 words)Research Paper
Englander (1986, pp. 64,) has identified some of the roadblocks to effective communication that teachers are apt to use; such as: “Emphatic listening” is a way to handle and minimize the impacts of communication roadblocks (Charles, 2000, pp, 52). He further explains
1 Pages(250 words)Research Paper
Digital Radiography
Digital radiography makes use of solid-state detectors in place of x-ray films in order to produce images of organs on the computer screen. “Radiographic digital imaging is a specific type of radiography
3 Pages(750 words)Research Paper
Digital weaving
The complex imaging that was so hard in the old days was adequately mechanized. This further provided a number of alternatives to the artists in imagery making. Today, artists have moved to the ‘high-tech’ means. Easy
3 Pages(750 words)Research Paper
Let us find you another Research Paper on topic Digital communication schemes + AWGN channel for FREE!
Contact us:
Contact Us Now
FREE Mobile Apps:
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us