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28

and implementation.

Note that in practice, the peak power would have limitations; this would

affect the lower ρ in the simulations.

4.3 Pulsed Noised Jamming BER Analysis for DSSS

In coherent systems direct-sequence spread spectrum (DSSS) systems, the bit error rate is:

(9)

  • 

    =

2

Where PEb is the probability for error or BER, Q( ) is the Q-function, Eb is the energy of each

bit, and No is the one-sided noise spectral density. When the PNJ is added to the system the

equation becomes the following:

(10)

  • 

    = 1 −  

2

  • +

    

2+ /

Where (1 –ρ) represents the time that the jammer is “off”. If it is assumed that the noise is

negligible with respect to the jamming level, this equation can be simplified to:

(11)

  • 

    ≈ 

2/

  •     

    ,

  • 

    ≈ 

2

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