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36

below, shows the effects of SESS with an iterative detector in the worst-case jamming

conditions. This simulation assumes that the initial spreading sequences are synchronized and

that noise of the channel is negligible.

BER vs. Eb/Nj N=32 Tx=100,000 Worst-Case Jamming in SESS w/ Iterative Detector

10-1

10-2

jdc = 0.00032 jdc = 0.0016 jdc = 0.008 jdc = 0.04 jdc = 0.2 jdc = 1 AWGN Worst-Case w/o detector

BER

10-3

Worst-Case Jamming w/ Detector

10-4

10-5

0

5

10 Eb/Nj (dB)

15

20

Figure 16 - Worst-Case Jamming SESS Simulation

As the same in DSSS, the envelope of the family of curves exhibits an inverse linear

relation between Pbmax and the Eb/Nj can be seen. This makes Equation (19), the worst-case

jamming in SESS with iterative detector, easily calculated by finding of the equation of the line

in Figure 16.

(19)

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