Performance analysis of MC‐CDMA by employing the MMSE‐PIC scheme in wireless communications

Abstract

SummaryFrom the past decade, the multicarrier code division multiple access (MC‐CDMA) transmission schemes have placed major role in wireless communications. It is providing a secured wireless communication to the users with guaranteed performance. In many situations, the performance of the MC‐CDMA is restricted due to the interference caused by multiple access interference (MAI), which also influences the frameworks of CDMA. To overcome this issue, we concentrated on developing the efficient technique for data transmission with interference cancellation for downlink MC‐CDMA. In the proposed method, the interference cancellation procedure is done by using the regeneration and subtraction of MAI from the signal. The simulation results are evaluated using the MC‐CDMA system with different decision functions. Results proved that the proposed system is efficient in reducing the MAI along with an improved bit error rate (BER).

A novel subspace method for precise carrier frequency offset estimation in multicarrier modulation scheme under multiuser environment

“…1 Due to the high spectral efficiency and high-quality multimedia transmission, OFDM is one of the strongly adopted techniques in 4G standard such as long-term evolution (LTE) and is the basis of 5G waveforms. The basic principle of MC-CDMA is dividing the high rate data stream of every user into several low rate data streams like OFDM 2 and allows the multiple users to access the channel simultaneously by means of frequency domain spreading like CDMA. However, MC-CDMA is the MCM technique which is sensitive to carrier frequency offset (CFO) causes intercarrier interference (ICI) and greatly degrades the system performance.…”