2/25/2024 0 Comments Difference between ask psk fskAnd to identify which modulation scheme gives best BER performance. It is observed that the BER is minimum for AWGN. which one is superior.in terms of bandwidth,SNR or P(e), modulating and demodulating complexity and so on. to be precise i want to know Analog modulation versus Digital modulation(ASK vs AM,FSK vs FM, PSK vs PM). By implementing the different modulation techniques, the criterion is comparison of the variation of BER for different SNR. ask psk fsk i want the differences between ASK and AM ,FSK and FM ,PSK and PM. Additive White Noise Gaussian (AWGN), multipath Rayleigh fading and Rician fading are considered in the channel. The performances of these modulation techniques are evaluated when the system is subjected to a number of users as well as noise and interference in the channel. The 3 main methods used to modulate digital signals are amplitude shift keying (ASK), frequency shift keying (FSK) and phase shift keying (PSK). We will go for analysis of Quadrature phase shift key and 16-ary Quadrature Amplitude modulations which are being used in wideband code division multiple access system, so that the system can go for more suitable modulation technique to suit the channel quality, thus we can deliver the optimum and efficient data rate to mobile terminal. The following image is the diagrammatic representation of FSK modulated waveform along with its input. It is a type of encoding technique where frequency is used to convert the digital data into analog signal. We will use MatLab 7.4 for simulation and evaluation of BER and SNR for W-CDMA system models. FSK: FSK stands for frequency shift keying. There are mainly two types, namely binary phase shift keying and quadrature phase shift keying. We can analysis the performance of these modulation techniques when the system is subjected to AWGN and multipath Rayleigh fading are consider in the channel. It is a digital modulation technique which uses phase of the analog carrier to represent digital binary data. The transmission from base station to mobile or downlink transmission using M-ary Quadrature Amplitude modulation (QAM) and Quadrature phase shift keying (QPSK) modulation scheme are consider in W-CDMA system.
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