Advanced Coding Techniques in 3G and 4G

Abstract

In the today’s world of communication we need a better strength of signal at the different relative Base station(BS) .This phenomena is achieved by different modulation as well as coding techniques. Especially in mobile technology of 3G and 4G generation. In 3G modulation and coding schemes estimated channel condition we maintain acceptable frame error rate. In MCS we maintain also propose a simplified Markov model with fewer parameters, which is suitable in systems where changes in the fading characteristics need to be accounted for in an adaptive fashion. Similar way in 4G for enhancement of system for practical implementation and data capacity. For 4G wireless networks, that demand terribly high rate up to 100 Mbits/switch the constraints limiting higher rate being severe isi due to multipath and also the restricted spectrum, such reasonably adaptive modulation based mostly multi-carrier systems applied to a wide-area atmosphere, are able to do terribly massive average user throughputs. For 3G coding techniques we use a first order finite state Markov model and for 4G OFDM-CDMA systems in Rayleigh fading channels.