Code Division Multiple Access Transmission Techniques for 3G & 4G Wireless Communication Systems: A Survey
نویسنده
چکیده
Code Division Multiple Access (CDMA) is currently dominating air interface technique used in wireless communications for 3G and 4G systems. Multicarrier CDMA has become the focus of current research interests in wireless digital communication. Multi carrier CDMA, Orthogonal Frequency Division Multiplexing (OFDM) techniques used for 3rd Generation and 4 th Generation wireless network systems allow high data rate transmission. Rapid time variations of the wireless channel have an effect on the performance of CDMA systems. The objective of the paper is to provide a survey on CDMA transmission techniques for 3G and 4G systems and performance analysis of Multicarrier CDMA system model for different spreading sequences like Walsh codes, PN codes and Gold codes implemented on Rayleigh fading channel and Additive White Gaussian Noise(AWGN) channel using MATLAB. Index Term— CDMA, OFDM, Rake Receiver.
منابع مشابه
Comparsion of Various Detection Techniques of Multi Input Multi Output Interleave Division Multiple Access Systems
Different interleavers are employed in Interleave Division Multiple Access (IDMA) instead of using different signatures as in a conventional code-division multiple-access (CDMA) scheme. Multiple Input Multiple Output (MIMO) system exploits multiple antennas at transmitter and receiver to mitigate the fading effect. To offer the promising communication beyond 3G and 4G wireless communication, ID...
متن کاملA Survey on Performance Enhancement of MIMO- CDMA Systems
CDMA (Code Division Multiple Access) plays an important role in modern wireless communications. MIMO refers to links with multiple antennas at the transmitter and receiver side. CDMA systems combined with multiple antennas is a promising technique, beyond 3G and 4G wireless communications. MIMO provides spatial diversity, which mitigates the fading. The usage of multiple antennas can significan...
متن کاملBer Enhancement of Mimo-cdma Based on Space-time Block Codes
Now a days, the demand for wireless communication systems with high data rates and high capacity has dramatically increased. CDMA (Code Division Multiple access) plays an important role in modern wireless communication systems. MIMO refers to links with multiple antennas at the transmitter and receiver side. CDMA with MIMO is a very promising technique beyond 3G and 4G wireless communications. ...
متن کاملEmerging high speed technology in mobile communication: 4G
4G (Fourth generation) mobile communications will have higher data transmission rates than 3G i.e. 4G is 3 times faster speed than 3G technology. Mobile communication is continuously one of the hottest areas that are developing at a high speed, with advanced techniques emerging in all the fields of mobile and wireless communications. Current times are just the beginning for deploying 3G mobile ...
متن کاملState of the Art and Future Trends in Wireless Communications: Advances in the Physical Layer
Emerging demands for high data rate multimedia based services and high spectral efficiency are the key drives for the continued technology evolution in wireless communications. Recently, several advancements have been introduced for 3G wireless communication systems to further enhance the data rate and the system performance (e.g., high speed downlink packet access (HSDPA) in wideband code divi...
متن کامل