[PDF] Top 20 An Improved Technique to Reduce ICI in OFDM Systems

... communication. OFDM promises at providing high data rate transmission while maintaining spectral efficiency because it is used as Multi Carrier (MC) communication technique ...an OFDM communication ... See full document

... interference. OFDM is a multicarrier transmission system in which transmission bandwidth is divided into many narrowband sub channels which are transmitted into ...mitigated. OFDM systems require ... See full document

... assisted OFDM systems can be obtained by employing the time-domain sequence of modulated pilot subcarriers to estimate the Channel Impulse Response (CIR) which is known as the Time Domain Least Square ... See full document

... 100%. The channel impulse response is assumed ideal known and a one-tap equalizer is used to compensate multipath fading. The figure 5 shows that BER performance is improved while applying proposed method and ... See full document

... modulation technique that divides the available spectrum into subcarriers, with each subcarrier containing a low rate data ...1. OFDM will play an important role in realizing Cognitive Radio (CR) concept by ... See full document

... for OFDM systems under Rayleigh fading channels has been ...significantly improved due to ICI reduction ...to reduce the computation complexity for the Wiener- based SIC scheme, the ... See full document

... MIMO-OFDM systems is done with frequency selective ...beam-forming technique is used for resolving low energy transfer efficiency problem by estimating the channel gains between transmit and receive ... See full document

... this technique highly depends not only on the pilots, which reduce the spec- tral efficiency of the system but also the accuracy of the pilot ...for OFDM systems over frequency selective fast ... See full document

... This technique is an advanced technology in realizing high speed wireless digital ...the OFDM transmission technique is applied for wide band communication systems integrated into a cellular ... See full document

... like OFDM it is difficult to maintain orthogonality between the subcarriers and it leads to performance degradation and intercarrier interference (ICI) will ...severe ICI due to Doppler shift between ... See full document

... multiplexing technique for high-bit-rate transmission in wireless ...In OFDM [1]- [3], the entire channel is divided into many narrow-band flat fading sub channels, which are transmitted simultaneously to ... See full document

... reduce the ICI power due to timing jitter [6-7]. I/Q imbalance appears when a front-end component doesn’t respect the power balance or the orthogonality between the I and Q branch[9]. While being able to ... See full document

... communication systems with redoubled turnout and ...like. OFDM is employed in several wireless communication devices and offers high spectral potency and resilience to multipath channel ...wireless ... See full document

... estimation technique for linear minimum mean square error (LMMSE) channel estimator of multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) ...proposed technique ... See full document

... Equalization Technique for Orthogonal Frequency-Division Multiplexing Systems in Time-Variant Multipath ...to ICI in a Multipath fading ...and improved BER results can be obtained with the ... See full document

... the OFDM symbols we used multiple narrow band subcarriers instead of use of a wide band signal for ...the OFDM system and used to reduce the interference between the carriers as interference is less ... See full document

... held technique for transmission of signals over wireless ...using OFDM scheme, standards such as 1- digital video broadcasting (DVB-T), 2- wireless local area networks (WLAN), 3- digital audio broadcasting ... See full document

... not improved with LDPC code without ...PPIC ICI canceller is compared with a standard PIC ICI canceller, which cancels 12 adjacent interfering subcarriers at every iteration, and an ICI ... See full document

... the OFDM system, it is vastly used in various communication ...to reduce the peak transmitted power which in turn reduces the range of multi carrier ...to reduce the peak transmitted power which in ... See full document

... The greater the step size the more will be the convergence speed. The time required by the algorithm to reach the optimum solution decreases hence the steady state error is reached. While if it increases too much then ... See full document