Title :
Multirate MC-DS-CDMA transmitter for 4G communications
Author :
Barbancho, Isabel ; Barbancho, Ana M. ; Tardon, Lorenzo J. ; Peinado, Alberto
Author_Institution :
Dep. Ingeneria de Comunicaciones, Malaga Univ., Spain
Abstract :
The scheme of a multirate 4G transmitter based on MC-DS-CDMA is proposed. The system is designed to minimize intercarrier interference (ICI) and multiaccess interference (MAI), taking into account the autocorrelation properties of the CDMA codes assigned to each user on each subcarrier. The system employs two layered spreading codes in a similar way to UMTS, so it will be simple to design terminals that support both systems. The proposed scheme can be employed in both synchronous or asynchronous uplink and downlink. The transmitter is very versatile and it provides multiple possibilities to allow multirate users.
Keywords :
3G mobile communication; 4G mobile communication; OFDM modulation; code division multiple access; interference suppression; radio transmitters; radiofrequency interference; spread spectrum communication; 4G communications; OFDM; UMTS; asynchronous link; intercarrier interference; interference minimization; layered spreading codes; multiaccess interference; multirate MC-DS-CDMA transmitter; synchronous link; 3G mobile communication; Autocorrelation; Degradation; Downlink; Frequency division multiplexing; Multiaccess communication; Multiple access interference; OFDM; Telecommunications; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
Print_ISBN :
0-7803-8521-7
DOI :
10.1109/VETECF.2004.1400152
