ตามที่ได้อธิบายไปก่อนหน้านี้

ตามที่ได้อธิบายไปก่อนหน้านี้

ผลลัพธ์ (อังกฤษ) 1:

As explained before

ผลลัพธ์ (อังกฤษ) 2:

We now consider the case where the CSI g[i] is known to the receiver at time i. Equivalently,
γ [i] is known to the receiver at time i. We also assume that both the transmitter and receiver
know the distribution of g[i]. In this case there are two channel capacity definitions that are
relevant to system design: Shannon capacity, also called ergodic capacity, and capacity with
outage. As for the AWGN channel, Shannon capacity defines the maximum data rate that
can be sent over the channel with asymptotically small error probability. Note that for Shannon capacity the rate transmitted over the channel is constant: the transmitter cannot adapt its
transmission strategy relative to the CSI. Thus, poor channel states typically reduce Shannon
capacity because the transmission strategy must incorporate the effect of these poor states.
An alternate capacity definition for fading channels with receiver CSI is capacity with outage. This is defined as the maximum rate that can be transmitted over a channel with an
outage probability corresponding to the probability that the transmission cannot be decoded
with negligible error probability. The basic premise of capacity with outage is that a high
data rate can be sent over the channel and decoded correctly except when the channel is in a104 CAPACITY OF WIRELESS CHANNELS
slow deep fade. By allowing the system to lose some data in the event of such deep fades,
a higher data rate can be maintained than if all data must be received correctly regardless of
the fading state, as is the case for Shannon capacity. The probability of outage characterizes
the probability of data loss or, equivalently, of deep fading

ผลลัพธ์ (อังกฤษ) 3:

As mentioned earlier.