Classic closed-form results (such as the well known log(1 + SNR) formula) apply only to the regime of infinite blocklength (infinite packet size/ infinite delay).

For finite blocklengths, no closed-form results are usually obtainable,  but there exist tight upper and lower bounds on fundamental limits, as well as approximations.

The idea behind the SPECTRE project is to create a toolbox that  provides numerical routines for the computation of these bounds and these approximations.

The current version of the toolbox is available on github at the following url:

https://github.com/yp-mit/spectre.git

The toolbox is under development and the participation of  additional  members of the information and communication theory communities  to this endeavor is warmly welcomed! 

For questions and access permissions: email  [email protected]