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With only a feedback delay of 1 symbol time.
The impact of feedback delay and feedback errors is ignored.
The effect of feedback delay was addressed in [14].
Case 1: interference only (no feedback delay), i.e., ρ = 1, and Case 2: interference and feedback delay, i.e., ρ < 1.
where τ 1 ≥ 0 is the feedback delay of the prey and τ 2 ≥ 0 is the feedback delay of the predator.
In Figure6, a feedback delay and back-haul delay of 1 symbol time each is assumed; on the other hand, only feedback delay is considered in Figure7.
We assume block fading channel and zero feedback delay for simplicity.
Hence, the CSI is subject to estimation, feedback, delay, and quantization errors.
We also assume perfect channel knowledge at the receiver and zero feedback delay.
The BS receives the CSI after a feedback delay, where is the OFDM symbol duration.
This numerical result for nonvanishing feedback connections complements the analytical result for vanishing feedback delay above.
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