• Smt. A. RAJANI
• M . Sailaja Devi

In this paper the salient advantage of PC is its ease of hardware implementation, but it induces in-band distortion and out-of-band radiation. In order to restrict the amount of distortion within an acceptable level, it is critical to carefully design the cancelling pulses as well as the envelope threshold over which PC is applied. In most studies, however, they are determined empirically through computer simulations. This paper thus focuses on a rigorous theoretical analysis of PC applied to band-limited orthogonal frequency division multiplexing (OFDM) signals, and discusses its validity and limitation for practical applications. Based on the level-crossing rate approximation of the peak distribution, we derive a closed-form expression for the achievable signal-to-distortion power ratio (SDR). We also analyze the adjacent channel leakage ratio (ACLR) as well as error vector magnitude (EVM), with which the symbol error rate (SER) over an additive white Gaussian noise (AWGN) channel is obtained. All the theoretical results developed in this work are compared with those based on the corresponding computer simulations to justify our analytical approach. It thus serves as a useful and accurate tool for designing cancelling pulses as well as the threshold level, for given specific system requirements such as SDR (or EVM) and ACLR. Multiuser multiple-input multiple-output (MUMIMO) transmission techniques have been popularly used to improve the spectral efficiency and user experience. However, due to the coarse knowledge of channel state information at the transmitter (CSIT), the quality of transmit precoding to control multiuser interference is degraded and hence coscheduled user equipment (UE) may suffer from large residual multiuser interference

INCREASING THE THROUGH PUT IN THE MIMO OFDM SYSTEMS BY USING PEAK CANCELLATION

"INCREASING THE THROUGH PUT IN THE MIMO OFDM SYSTEMS BY USING PEAK CANCELLATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.163-168, May-2019, Available :http://www.jetir.org/papers/JETIR1905R24.pdf

"INCREASING THE THROUGH PUT IN THE MIMO OFDM SYSTEMS BY USING PEAK CANCELLATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp163-168, May-2019, Available at : http://www.jetir.org/papers/JETIR1905R24.pdf