4 ms·
People always react to new RF technologies with "SHANNON'S LAW!!!" and ignore the fact that Shannon's Law refers to channels, not frequencies. If you create a n
by nardi 12y ago
People always react to new RF technologies with "SHANNON'S LAW!!!" and ignore the fact that Shannon's Law refers to channels, not frequencies. If you create a new channel through active interference, you get more bandwidth.
- wirelessjunkie 12y agoThat's absolutely right. By isolating the transmitter and receiver, you are able to create an independent channel for the receiver, which can operate independently of the transmit channel, while each of those channels obey Shannon's law. Another correction -- Shannon's law is logarithmic -- C (bit/sec/Hz) = logbase2(1+SNR) ~= logbase2(SNR) for high SNR. Thus a 3dB increase in SNR is a 1 bit increase in capacity. Clearly, there is a low ROI on increasing tx power beyond a certain point.