On linear unequal error protection codes

It is possible for a linear block code to provide more protection against errors for selected mess~ge positions than is guaranteed by the minimum distance of the code. Codes having this property are called Linear Unequal Error Protection (LUEP) codes. In this report the optimal encoding of LUEP codes is discussed and bounds on the length of a code that ensures a given unequal error protection are derived. A number of constructions of LUEP codes are given. Cyclic UEP codes together with Majority Logic Decodi~g of certain classes of these are treated. A list of LUEP codes of m~nimal, len~tb and a list of cyclic UEP codes are included. AMS Subject Classification: 94B05, 94B60.