Diversity-Coding-Orthogonality Trade-off for Coded MC-CDMA with High Level Modulation

Performance Comparison of Turbo Coded Mc-cdma and Ds-cdma with Higher Level Modulation

Multi-carrier code division multiple access (MC-CDMA), direct sequence code division multiple access (DS-CDMA) and orthogonal frequency division multiplexing (OFDM) are the major contenders for wireless signaling technique. For higher data rates, the use of higher level data modulation is desirable. In MC-CDMA [1], the data-modulated symbol to be transmitted is spread over a number of subcarrie...

Coded MC-CDMA Systems for Power Line Communications

In this paper we use a channel model based on measurements from [l] to test the performance of a coded multicarrier CDMA system over the powerline channel from the secondary transformer coil to the subscriber. We focus on the different coding techniques which show that coding can make the difference under such a hostile medium. The comparison of coding, modulation types and the presencelabsence...

The Throughput Performance of LDPC Coded HARQ for MC-CDMA

Broadband packet access techniques will be required for the next generation mobile communications systems. Hybrid ARQ (HARQ) is one of the promising error control techniques. Recently, LDPC coding is gaining much attention. Multi-carrier code division multiple access (MC-CDMA), which uses a number of subcarriers to reduce the ISI resulting from frequency selective channels, has been attracting ...

LDPC Coding for Performance Enhancement of MC-CDMA System

A turbo block code (TBC) technique for improving the performance of a multi-carrier code division multiple access (MC-CDMA) system in terms of bit error rate (BER) is proposed in this paper. The objective of this work is to develop a coding scheme that generates low BER code-words. By implementing a time domain TBC, designed using powerful low density parity check (LDPC) code, the BER performan...

Transmitter Space–Time Diversity for Broadband MC-CDMA Systems