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QPSK DS CDMA System over Rayleigh Channel with a Randomly Varying Frequency Narrow Band Interference: Frequency Tracking Analysis

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Figure

Figure 1. QPSK DS-CDMA communications system model. (a) Transmitter; (b) Receiver.
Figure 1 can be written as (for simplicity, Tc is nor-malized to unity)
Figure 2. Frequency tracking MSE with number of DS-CDMA users K as a parameter.
Figure 4. Optimum step-size constant versus number of ctive users K.  a

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