[PDF] Top 20 Performance evaluation of ofdm system using convolution code under awgn, rayleigh and rician channel

... In OFDM, the OFDM system makes good use of the IFFT and that's due to the fact that, the samples of a waveform gets generated with orthogonal frequency ...in OFDM. The parallel to serial block ... See full document

... etc. OFDM system utilized the spectrum with its Orthogonality and in order to reduce ...interference. OFDM has ability to providing much higher spectral efficiency because multiple subcarrier are ... See full document

... the performance and diversity gains of the ...the channel noise. The block diagram of M X N MIMO system is represented in figure which consists of M antennas at transmitter side and N antennas at ... See full document

... In OFDM the data is modulated using multiple number of sub-carriers that are orthogonal to each other because of which the problems associated with other modulation schemes such as Inter Symbol Interference ... See full document

... transmission. OFDM may be combined with antenna arrays at the transmitter and receiver to increase the diversity gain and/or to enhance the system capacity on time-variant and frequency- selective channels, ... See full document

... the performance of ½ rate convolutional coding for orthogonal frequency division multiplexing (OFDM) system and multicarrier code division multiple access (MC-CDMA) ...the performance ... See full document

... diversity using an arbitrary number of transmit antennas for secure communications and to improve the system performance by mitigating ...the performance of DS-CDMA systems over ... See full document

... The message bits are shifted into the encoder one bit at a time, and the outputs of the n adders are sequentially sampled and transmitted, so that there are n code bits for each message bit and the code ... See full document

... by using the phase difference between two neighboring ...demodulated using the previous symbol as a ...differential system has 2 sources of error: a corrupted symbol, and a corrupted ... See full document

... new OFDM based technology and promises to combine high data rate services with wide area coverage in frequency range of 10 – 66 GHz (Line of sight) and 2 -11 GHz (Non Line of Sight)) and large user densities with ... See full document

... mobile system requires a several aspects as the needs of increasing rate, the mobile character of terminal and a context congestion of ...the OFDM is adapted to respond on the posed ...[1].The ... See full document

... Digital modulation techniques contribute to the evolution of our mobile wireless communications by increasing the speed, capacity, performance as well as the quality of the wireless network. This paper focuses on ... See full document

... the performance of DVB-T was analyzed by using the parameters given by ETSI standard, According to simulation it is found that 2k modes are less prone to errors but as the modulation scheme is increased, it ... See full document

... The theory of lifting wavelet transform is proposed by Swedens and Daubechies in the mid 90’s, which is a kind of simple and general wavelet construction scheme that does not depend on Fourier transform[6]. It has the ... See full document

... common channel and detected, without ...single channel by assigning unique time slots to each separate information ...term OFDM has been reserved for a special form of FDM ... See full document

... models, Rayleigh fading, Ricean fading and Nakagami fading models are most widely ...used.The Rayleigh fading is primarily caused by multipath ...signals. Rayleigh fading is most applicable when ... See full document

... output channel is a converted into parallel stream and then cyclic prefix bits are removed from it ...these channel effect MLSE is performed equalized output is converted back to data words by demodulator ... See full document

... of using complex exponential functions, cosinusoidal functions can be used as orthogonal basis to implement multi-carrier ...synthesized using discrete cosine transform (DCT) [Tan ...based OFDM [Chen ... See full document

... over AWGN channel for MIMO system with different antenna configurations using OSTBC4 with zero forcing receivers are ...MIMO system, the BER keeps on decreasing due to the space ... See full document

... communication system required for data transmission over a band-pass channel and each scheme gives system trade-offs of its ...of system is determined by the method in which the available ... See full document