Trade-off between channel coding and spreading in multi-carrier CDMA systems. Abstract: The efficiency of multi-carrier code division multiple access (MC-CDMA) systems for mobile radio communications depends on the processing gain due to bandwidth expansion and on the gain offered by channel coding. This paper. 4 Sep The flu is easy to spread. WebMD tells you how to avoid friends, or colleagues get sick. That's why it's important to understand "the rules" on how to keep the highly contagious flu virus to yourself and avoid spreading it to others. Birthday to You -- twice. Once isn't enough time to get all the germs off. Spread betting is any of various types of wagering on the outcome of an event where the pay-off is based on the accuracy of the wager, rather than a simple " win or lose" outcome, such as fixed-odds (or money-line) betting or parimutuel betting. A spread is a range of outcomes and the bet is whether the outcome will be.