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In mobile integrated service digital network, high bit-rate data transmission is essential for many services such as video, multimedia etc. When data is transmitted at high bit-rate, wireless channels exhibit delay dispersion because of multipath components (MPC). Different propagation times from transmitter (Tx) to receiver (Rx) in MIMO systems produces different MPCs. This in turn leads to Inter Symbol Interference (ISI), which can greatly disturb the transmission of digital signals. If delay spread is smaller than the symbol duration, it can lead to considerable Bit Error Rate (BER) degradation. Equalization defines any signal processing technique used at r e c e i v e r to make the signal less susceptible to delay spread. Equalizers require an estimate of channel impulse or frequency response to mitigate the ISI. In this paper the performance of equalization techniques are compared by considering 2 transmit and 2 receive antennas (resulting 2x2 MIMO Channel). Assume that channel is flat fading Rayleigh multipath-channel and modulation is BPSK.

To enhance the performance and reduce the Inter Symbol Interference (ISI) at enhanced data rates in wireless communications, Orthogonal Frequency Division Multiplexing (OFDM) is being used. The performance of OFDM is degraded due to frequency and timing offsets which increase the Bit Error Rate (BER) in the wireless communication. Frequency offsets are caused due to difference between transmitter / receiver oscillators and Doppler shift. Timing offsets are due to symbol timing and sampling clock drift. This is estimated and compensated in the receiver.In this paper packet based data transmission test bed has been implemented for OFDM to analyze frequency and time deviation. The effect of frequency offset and timing offset in packet reception over different modulation techniques like BPSK, QPSK is evaluated. By incorporating the noise voltage, normalized frequency and sample timing offset the channel model is simulated in the noisy environment and effect of these parameters considered to maximize the throughput.The OFDM packet based data transmission with offset correction is simulated by using GNU Radio which is free & open-source software tool that provides signal processing blocks with a facility of modifying codes in these blocks.

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Among different types of Non-Conventional Energy Sources, Solar Power has become highly prominent with exhausting suitable to innovation in Power Electronic Systems. The primary intention of the advised performance must limit the number of switches to enhance the output waveforms with a preferred harmonic profile. This topology moderates the estimate about switches, isolated DC origin, expenditure, and intensity of the circuit substantially as correlated to other topologies. The proposed method uses the MPPT approach to exploit the maximum energy from solar photovoltaic to load entirely. The Proposed method provides almost sinusoidal output waveforms by developing a few power switches. The SPV arrangement was simulated and constitution through SPV arrays, a DC-DC buck converter, and a sliding mode MPPT regulation. Based on the cascaded H-Bridge multilevel converters, The strong constraint enforced confined DC voltage sources considering separately Cascaded H-Bridge. This constitution converter worth along with diminishing the constancy based on the system. The system gives boosting voltages with improves the harmonic profile. Performance of the arrangement demonstrated in MATLAB SIMULINK as well as PROTEUS.