I do not understand what you mean by “Real Capacity”.

]]>But how can we test and find the shannon capacity of a new system, for example, sending an amount of data and receive it at the other end and measure the capacity.

It is obvious for BER, you just send some data and measure how many of them where failed to decode properly. But how can you find it’s capacity?? ]]>

Pi=9mWatt

Pn=10^(-8)*10000=0.1mWatt

P_ON=0.25

P_OFF=0.75

In case it is known when the jammer is on and when its off the capacity would be sum of two capacities.

C_ON=B*log2(1+SINR)=10000*log2(1+10/(0.1+9))=10000*log2(2.0989)=10696 bits/sec

C_OFF=B*log2(1+SNR)=10000*log2(1+10/0.1)=10000*log2(101)=66582 bits/sec

C_Total=P_ON*C_ON+P_OFF*C_OFF=0.25*10696+0.75*66582=52610 bits/sec

If it is not known when the jammer is on you can adopt one of two strategies.

1. Always transmit at the lower rate dictated by presence of jammmer.

2. Always transmit at the higher rate and totally lose the signal for 25% of the time.

Figure out which one is better!

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