Duong, Trung

Nallanathan, Arumugam

Nguyen, Quyen

Two direct sampling correlator-type receivers for differential chaos shift keying (DCSK) communication systems under frequency nonselective fading channels are proposed. These receivers operate based on the same hardware platform with different architectures. In the first scheme, namely Sum-Delay-Sum (SDS) receiver, the sum of all samples in a chip period is correlated with its delayed version. The correlation value obtained in each bit period is then compared with a fixed threshold to decide the binary value of recovered bit at the output. On the other hand, the second scheme, namely Delay- Sum-Sum (DSS) receiver, calculates the correlation value of all samples with its delayed version in achip period. The sum of correlation values in each bit period is then compared with the threshold to recover the data. The conventional DCSK transmitter, frequency nonselective Rayleigh fading channel, and two proposed receivers are mathematically modeled in discrete-time domain. We evaluated the BER performance of the receivers by means of both theoretical analysis and numerical simulation. The performance comparison shows that the two proposed receivers can perform well under the studied channel, where the performances get better when the number of paths increases and the DSS receiver outperforms the SDS one

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Modeling, Analysis and Performance Comparison of Two Direct Sampling DCSK Receivers under Frequency Nonselective Fading Channels

https://kclpure.kcl.ac.uk/portal/files/49140149/Quyen_IET.pdf

Modeling, Analysis and Performance Comparison of Two Direct Sampling DCSK Receivers under Frequency Nonselective Fading Channels

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