Publications of IIUC Family

Permanent URI for this communityhttp://dspace.iiuc.ac.bd/handle/88203/9

Browse

Filters

20152

Settings

Author: search.filters.author.Khaliluzzaman, Md.Subject: search.filters.subject.BER

Search Results

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Evaluation of SNR for AWGN, Rayleigh and Rician Fading Channels Under DPSK Modulation Scheme with Constant BER
    (International Journal of Wireless Communications and Mobile Computing, 2015-02-06) Chy., Deepak Kumar; Khaliluzzaman, Md.
    With the growing demand in modern communication, it has become necessary to give better and efficient service to users by using better technique. Technique such as Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK), Phase Shift Keying (PSK), Differential Phase shift Keying (DPSK) and Quadrature Amplitude Modulation (QAM) are very important parts of the implementation of modern communications systems in which DPSK is the simplest and most robust of all techniques. In this paper, evaluation of SNR in terms of constant bit error rate is performed on AWGN, Rayleigh and Rician fading channels. Among these channels, Rician is showing better performance as compared to AWGN and Rayleigh
  • No Thumbnail Available
    Item
    Comparative Performance of BER in the Simulation of Digital Communication Systems using Raised Cosine Filter
    (International Journal of Advancements in Communication Technologies– IJACT, 2015-10-30) Chy., Deepak Kumar; Khaliluzzaman, Md.
    The robustness of the digital communication system is illustrated by comparing the BER and SER with and without filter. This research entails the development of a digital communication model that transmits base band data over an additive white Gaussian noise channel (AWGN). The performance of this model is enhanced by employing raised cosine filter which reduce the BER and SER compared to model without filter. The results show that the performance of the system improves when filter is implemented. The performance of 16-QAM is found to be better than that of 32-QAM and 64-QAM, which means that there must be a tradeoff between BER and energy efficiency of Modulation schemes of QAM. In this paper inter symbol interference (ISI) is examined and It is seen that ISI place an important role in digital communication systems. This paper also observed that overall transmission errors are less while increasing the ratio of bit energy per symbol (Eb /N0 ). Matlab communication tool box has been used for simulation