Digital Modulations

Simulation of M-PSK modulation techniques in AWGN channel

A generic simulation technique to simulate all M-PSK modulation techniques (for upto M=32) is given here. The given simulation code is very generic, and it plots both simulated and theoretical symbol error rates for all M-PSK modulation techniques (upto M=32). M-PSK Modulation and simulation methodology: The general expression for...
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BPSK

Intuitive derivation of Performance of an optimum BPSK receiver in AWGN channel

BPSK modulation is the simplest of all the M-PSK techniques. An insight into the derivation of error rate performance of an optimum BPSK receiver is essential as it serves as a stepping stone to understand the derivation for other comparatively complex techniques like QPSK,8-PSK Understanding the concept of...
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Channel Modelling

Eb/N0 Vs BER for BPSK over Rayleigh Channel and AWGN Channel

The phenomenon of Rayleigh Flat fading and its simulation using Clarke’s model and Young’s model were discussed in the previous posts. The performance (Eb/N0 Vs BER) of BPSK modulation (with coherent detection) over Rayleigh Fading channel and its comparison over AWGN channel is discussed in this post. We first...
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Digital Modulations

BER Vs Eb/N0 for BPSK modulation over AWGN

In the previous article we saw about how Passband BPSK modulation and demodulation can be done. This concept is extended further to simulate the performance of BPSK modulation technique over an AWGN. Note that this is a baseband simulation of BPSK modulation and demodulation. Baseband simulation are faster and...
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Channel Coding

Channel Coding

The next block in a communication system is the Channel coding block. There is an important difference between Channel coding and source coding. Source coding attempts to compress the data to improve bandwidth utilization, while Channel coding attempts to add redundancy to the data to make it more reliable...
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