Arıkan, Erdal2016-02-082016-02-081989http://hdl.handle.net/11693/27831Date of Conference: 15-18 October 1989Conference Name: IEEE Military Communications Conference, Bridging the Gap: Interoperability, Survivability, Security, MILCOM 1989It is known that under energy constraints it is best to have each code word of a code satisfy the constraint with equality, rather than have the constraint satisfied only in an average sense over all code words. This suggests the use of fixed-composition codes on additive Gaussian noise channels, for which the coding gains achievable by this method are significant, especially in the high signal-to-noise-ratio case. The author examines the possibility of achieving these gains by using fixed-composition trellis codes. Shell-constrained trellis codes are promising in this regard, since they can be decoded by sequential decoding at least at rates below the computational cutoff rate.EnglishCodes symbolic encodingInformation theory communication channelsRadio interferenceGaussian noise channelsSequential decodingShell constrained trellis codesTrellis codingConference Paper10.1109/MILCOM.1989.103924