Title :
Exact error floor for downlink MC-CDMA with maximal ratio combining in correlated Nakagami fading channels
Author :
Shi, Qinghua Rock ; Latva-aho, Matti
Author_Institution :
Centre for Wireless Commun., Oulu Univ., Finland
Abstract :
Relying on the method of characteristic function (CF) and residue calculation, we obtained an exact and closed-form error floor for downlink multicarrier code-division multiple access (MC-CDMA) with maximal ratio combining (MRC) in correlated Nakagami (1960) fading channels. Analysis results show that orthogonal spreading sequences (Walsh and orthogonal Gold sequences) perform better than non-orthogonal sequences (Gold sequences) and Walsh codes are the best. We also find that downlink MC-CDMA can benefit from the correlation between subcarriers
Keywords :
Rayleigh channels; code division multiple access; codes; correlation methods; land mobile radio; multiuser channels; radio links; sequences; MC-CDMA; MRC; Walsh codes; characteristic function; closed-form error floor; correlated Nakagami fading channels; correlated Rayleigh fading channel; downlink; downlink MC-CDMA; exact error floor; maximal ratio combining; multicarrier code-division multiple access; nonorthogonal sequences; orthogonal Gold sequences; orthogonal spreading sequences; residue calculation; subcarriers correlation; Bit error rate; Diversity reception; Downlink; Fading; Gaussian approximation; Gold; Multiaccess communication; Multicarrier code division multiple access; Narrowband; Performance analysis;
Conference_Titel :
Broadband Communications, 2002. Access, Transmission, Networking. 2002 International Zurich Seminar on
Conference_Location :
Zurich
Print_ISBN :
0-7803-7257-3
DOI :
10.1109/IZSBC.2002.991780
