Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
CURRENTLY, orthogonal frequency division multiplexing (OFDM) is emerging as the preferred modulation technique in modern high data rate broadband wireless mobile communication systems. In OFDM, the entire spectrum is divided into subcarriers which are narrow-banded with respec to the coherence bandwidth of the channel. This provides resistance against frequency-selectivity of the channel for wideband data transmission. However, the well known problem in OFDM system is its vulnerability to the frequency offset errors causedby oscillator inaccuracies or the Doppler frequency shift due to mobility. In high mobility scenarios, the orthogonality of the subcarriers is no longer maintained that results in inter-carrier interference (ICI). Hence, the transmission performance of the mobile OFDM system is degraded severely.
ICI cancellation techniques are essential in improving the per formance of OFDM system in an environment which induces frequency offset error. A lot of ICI mitigation methods have been extensively investigated to combat the ICI, including fre- quency-domain equalization, time-domain windowing and the self-cancellation schemes, frequency offset estimation and tracking techniques and so on. Among the methods, the ICI self-cancellation method is a simple way to suppress ICI that uses redundant modulation. Several selfcancellation methods have been exploited, including data conversion, data conjugate and symmetric data-conversion/conjugate methods. Windowing methods reduce the SNR but they need redundant information. That is, the performances of the windowing methods and self-cancellation methods degrade signi?cantly with the increase of frequency offset. Besides, maximum likelihood estimation and extended Kalman
Q. What are the different types of MOSFET transistors ? The metal-oxide semiconductor field-effect transistor (MOSFET) is a three-terminal active device which has many applicat
What is basic requirement of semiconductor laser? Draw its label diagram and explain its working with necessary theory. Write down the applications of semiconductor laser.
advantages of constant current bias
what is the purpose of superposition theorem
Mode 1 In this mode transistor Q gets turned on by the positive output of the PWM. After that current flows through inductor L transistor Q then back to supply in thi
Q. Draw a 100 line exchange using two motion selectors and elucidate, how switching takes place in it. Ans: In a 100 line exchange, every subscriber is assigned a 2 digit
Speed Control of DC Series Motor A half wave circuit for the speed control of DC series motor is shown in figure and corresponding wave from is shown in figure consis
Use PSpice to solve for the amplitude and phase of the current and the voltage across the inductor in the circuit shown in Figure(a).
Explain Series capacitors These are connected in series with the line conductors and are used to reduce the inductive reactance of long transmission lines and hence the voltage
1) Use plot of the stock return and consider the Autocorrelation Function to determine the auto-regressive structure of the data and explain why you think the return is stationary
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd