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--- communication:channel_capacity [2009/02/05 20:07] – created rocketboy
+++ communication:channel_capacity [2009/02/05 20:25] (current) – rocketboy
@@ Line 1: / Line 1: @@
 ====== Channel Capacity ======
-This spreadsheet puts Shannons Therom, Free space path loss and thremal noise formula together to work out the theoretical maximum channel capacity (bits per scond) that can be got through a communication channel given Frequency, Distance, Channel bandwith and transmit power. You can also enter total (transmit + receive) antenna gain.
+This spreadsheet puts Shannons Therom, Free Space Path Loss and thremal noise formula together to work out the theoretical maximum channel capacity (bits per scond) that can be squeezed through a communication channel given Frequency, Distance, Channel bandwith and transmit power. You can also enter total (transmit + receive) antenna gain.
+This is the highest theoretical data rate you can get given the parameters - the actaul rate will be lower than this and will depend on coding efficency and channel noise (e.g. sky noise, front end and amplifier noise).
+{{communication:channel_calc_V1.xls|G8KHW Frespace Channel Capacity Calculator}}
+Enter data in the green cells - result in the yellow.
+Play with the spreadsheet and see what difference the parameters make.
+Remember - ya canna change the laws of physics.
-Enter data in the green cells