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The problem of optimal periodic pulse jamming design for a quadrature phase shift keying(QPSK)communication system is investigated.First a closed-form bit-error-rate(BER)of QPSK system under the jamming of pulse signal is derived.Then the asymptotic performance of the derived BER is analyzed as the signal-to-noise ratio(SNR)grows to infinity.In order to maximize the BER of the QPSK system,the optimal parameters of periodic pulse jamming signal,including the duty cycle and signal-tojamming power ratio(SJR),are found out.Numerical results are presented to verify our analytical results and the optimality of our design.
The problem of optimal periodic pulse jamming design for a quadrature phase shift keying (QPSK) communication system is investigated. First a closed-form bit-error-rate (BER) of QPSK system under the jamming of pulse signal is derived. Try the asymptotic performance of the derived BER is analyzed as the signal-to-noise ratio (SNR) grows to infinity.In order to maximize the BER of the QPSK system, the optimal parameters of periodic pulse jamming signal, including the duty cycle and signal-to-jamming power ratio (SJR), are found out. Numerical results are presented to verify our analytical results and the optimality of our design.