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RESEARCH POSTER PRESENTATION DESIGN © 2012 www.PosterPresentations.com QUICK DESIGN GUIDE (--THIS SECTION DOES NOT PRINT--) This PowerPoint 2007 template produces a 42”x60” professional poster. It will save you valuable time placing titles, subtitles, text, and graphics. Use it to create your presentation. Then send it to PosterPresentations.com for premium quality, same day affordable printing. We provide a series of online tutorials that will guide you through the poster design process and answer your poster production questions. View our online tutorials at: http://bit.ly/Poster_creation_help (copy and paste the link into your web browser). For assistance and to order your printed poster call PosterPresentations.com at 1.866.649.3004 Object Placeholders Use the placeholders provided below to add new elements to your poster: Drag a placeholder onto the poster area, size it, and click it to edit. Section Header placeholder Use section headers to separate topics or concepts within your presentation. Text placeholder Move this preformatted text placeholder to the poster to add a new body of text. Picture placeholder Move this graphic placeholder onto your poster, size it first, and then click it to add a picture to the poster. QUICK TIPS (--THIS SECTION DOES NOT PRINT--) This PowerPoint template requires basic PowerPoint (version 2007 or newer) skills. Below is a list of commonly asked questions specific to this template. If you are using an older version of PowerPoint some template features may not work properly. Using the template Verifying the quality of your graphics Go to the VIEW menu and click on ZOOM to set your preferred magnification. This template is at 50% the size of the final poster. All text and graphics will be printed at 200% their size. To see what your poster will look like when printed, set the zoom to 200% and evaluate the quality of all your graphics before you submit your poster for printing. Using the placeholders To add text to this template click inside a placeholder and type in or paste your text. To move a placeholder, click on it once (to select it), place your cursor on its frame and your cursor will change to this symbol: Then, click once and drag it to its new location where you can resize it as needed. Additional placeholders can be found on the left side of this template. Modifying the layout This template has four different column layouts. Right-click your mouse on the background and click on “Layout” to see the layout options. The columns in the provided layouts are fixed and cannot be moved but advanced users can modify any layout by going to VIEW and then SLIDE MASTER. Importing text and graphics from external sources TEXT: Paste or type your text into a pre-existing placeholder or drag in a new placeholder from the left side of the template. Move it anywhere as needed. PHOTOS: Drag in a picture placeholder, size it first, click in it and insert a photo from the menu. TABLES: You can copy and paste a table from an external document onto this poster template. To make the text fit better in the cells of an imported table, right-click on the table, click FORMAT SHAPE then click on TEXT BOX and change the INTERNAL MARGIN values to 0.25 Modifying the color scheme To change the color scheme of this template go to the “Design” menu and click on “Colors”. You can choose from the provide color combinations or you can create your own. © 2012 PosterPresentations.com 2117 Fourth Street, Unit C Berkeley CA 94710 firstname.lastname@example.org Student discounts are available on our Facebook page. Go to PosterPresentations.com and click on the FB icon. Q-function which is used for error analysis in communication systems over fading channels is an integral function. It is very important for communication systems because of that error probability of communication channels is calculated by the help of this function. It is needed to determine error behavior of channel to achieve better quality in communication. However, it takes a long time to calculate Q- function because of integral form of the function. So that, we focused on how to calculate Q-function having better performance and more speedy. In this study, new lower and upper bounds on the Gaussian Q-function are obtained on Matlab. As part of the project, new bounds of Q function is calculated with new method which contains only two exponential terms with a constant and a rational coefficient. The curve of obtained Q-function and the other methods such as Jensen Cotes, exponential, numeric integration are plotted to present correctness of new method. At the second step of the study, bit error rate (BER) of QPSK modulation on AWGN channel is calculated by the help of new Gaussian Q-function. Results are compared with the theoretical bit error rate curve and Monte Carlo simulation curve of QPSK modulation. In this study, new and simple bounds of Q-function are calculated and compared with other methods such as Jensen-Cotes, exponantial form,numerical integration. Because of the fact that Q-function has an integral form, calculating Q-function takes a long time and shows worse performance. The New Supertight bounded Q-function has an exponantial form so it represents better performance. Mathematical operations take shorter time than other methods. The curves of New Supertight Lower Bound and New Supertight Upper Bound are plotted and checked against other methods. The curve of new Supertight Bounds Q-function is similar to others in addition to this, speed performance is much better. REFERENCES  Giuseppe Abreu, “Very Simple Tight Bounds on the Q-Function”, IEEE Transactions On Communications, vol. 60, no. 9, September 2012. Giuseppe Thadeu Freitas de Abreu, “Jensen-Cotes Upper and Lower Bounds on the Gaussian Q-Function and Related Functions “IEEE Transactions On Communications, vol.57, no.11, November 2009  Marco Chiani,Davide Dardari, Marvin K. Simon,» New Exponential Bounds and Approximations for the Computation of Error Probability in Fading Channels», IEEE Transactions On Wireless Communications, VOL. 2, NO. 4, JULY 2003  Won Mee Jang, “A Simple Upper Bound of the Gaussian -Function with Closed-Form Error Bound” IEEE Communications Letters, vol. 15, vo. 2, February 2011  Marco Chiani, “Improved Exponential Bounds and Approximation for the Q-function with Application to Average Error Probability Computation”, DEIS, CSITE-CNR, CNIT University of Bologna, V.le Risorgimento 2,40136 Bologna, ITALY BURAK COREKCIOGLU(040080498),ILKNUR ATES(040080456),BURAK KURT(040080486) ADVISOR: GUNES ZEYNEP KARABULUT KURT ANALYSIS OF NEW SIMPLE TIGHT BOUNDS ON THE Q-FUNCTION BURAK COREKCIOGLU(040080498),ILKNUR ATES(040080456),BURAK KURT(040080486) ADVISOR: GUNES ZEYNEP KARABULUT KURT ISTANBUL TECHNICAL UNIVERSITY, ELECTRONICS AND COMMUNICATION ENGINEEERING DEPARTMENT IMPLEMENTATION PART OF THE STUDY ON BPSK MODULATION WITH AWGN CHANNEL IMPLEMENTATION PART OF THE STUDY ON BPSK MODULATION WITH AWGN CHANNEL Bit error rate of BPSK modulation is calculated with combined New Supertight Bounds Q-function to present reliability of it. BER curves which are plotted with New Super Tight Bounds, Theoratical and Monte Carlo Simulation are compared. It has seen that, the curves are at the same line. Figure 4: Block Diagram of BPSK modulation on Matlab-Simulink Figure 5: Comparison of BER curves are obtained with using different methods Figure 1: Comparison of Q-Functions Figure 2 shows approaches of Numerical Integration, Exponential , Jensen- Cotes  and New Supertight Bounds Methods . In the interval of x between two and four, the supertight upper bound is on the numerical integration bound and the supertight lower bound is very close to it. It is easly can be said that the most closest bounds are New Supertight Bounds in this interval. Figure 2: Comparison of Q-Functions (x in dB) Calculation time performance analysis of four methods is represented in Figure 3. Result has been brought out with running matlab codes of methods 1000 times. Every result block indicates avarage calculation time of each methods in milliseconds. Although the time of Exponantial Methods is less than Supertight Methods’, approximation of it has worst result for N=2. If N parametre is increased, time performance dicreases. So that Supertight method has best time performance with better approximation result. Figure 3: Average calculation time of methods in milliseconds
QUICK TIPS (--THIS SECTION DOES NOT PRINT--) This PowerPoint template requires basic PowerPoint (version 2007 or newer) skills. Below is a list of commonly.
QUICK DESIGN GUIDE (--THIS SECTION DOES NOT PRINT--) This PowerPoint 2007 template produces a 36”x60” professional poster. It will save you valuable time.
RESEARCH POSTER PRESENTATION DESIGN © QUICK TIPS (--THIS SECTION DOES NOT PRINT--) This PowerPoint template requires basic.
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QUICK DESIGN GUIDE (--THIS SECTION DOES NOT PRINT--) This PowerPoint 2007 template produces a 36”x56” professional poster. It will save you valuable time.
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