Simplified joint detection in the frequency domain for the uplinkWPAN MC-CDMA system on MMW band

In an indoor mm-wave propagation environment, although the channel is time-invariant for a long time, the requirement of very high data rate makes the system design a hard mission and the severe MAI caused by asynchronous users in the uplink makes it worse. Although the MC-CDMA system for WPAN applications, on a 62.5 GHz carrier frequency, performs well for the single user scenario, it is very sensitive to MAI. We consider the adoption of joint detection (JD) to improve the BER performance. However, traditional JD, realized in the time domain, is too complicated to implement. Therefore, we proposed a simplified JD in the frequency domain, based on the specific characteristics of the MC-CDMA system matrix. Computer simulation results show that the JD MMSE-BLE scheme outperforms all the other data detection methods, especially for heavy system load with very low spreading factor and is realizable due to much less complexity compared with that of JD in the time domain.

[1]  Martin Haardt,et al.  Comparative study of joint-detection techniques for TD-CDMA based mobile radio systems , 2001, IEEE J. Sel. Areas Commun..

[2]  Ta-Sung Lee,et al.  An iterative maximum SINR receiver for multicarrier CDMA systems over a multipath fading channel with frequency offset , 2003, IEEE Trans. Wirel. Commun..

[3]  Jean-François Hélard,et al.  Optimum and sub-optimum linear MMSE multi-user detection for multi-carrier CDMA transmission systems , 2001, IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211).

[4]  Yoshitaka Hara,et al.  Multiuser Interference Suppression in Uplink Multicarrier CDMA Systems , 2002, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

[5]  Ramjee Prasad,et al.  CDMA for wireless personal communications , 1996 .

[6]  Peter Jung,et al.  Joint detection for multicarrier CDMA mobile radio systems. II. Detection techniques , 1996, Proceedings of ISSSTA'95 International Symposium on Spread Spectrum Techniques and Applications.

[7]  W. M. Carey,et al.  Digital spectral analysis: with applications , 1986 .

[8]  Nevio Benvenuto,et al.  Joint detection with low computational complexity for hybrid TD-CDMA systems , 2001, IEEE J. Sel. Areas Commun..

[9]  Davide Dardari,et al.  Fast ray-tracing characterisation of indoor propagation channels at 60 GHz , 1997, 1997 IEEE 47th Vehicular Technology Conference. Technology in Motion.

[10]  Peter Jung,et al.  Joint detection for multicarrier CDMA mobile radio systems. I. System model , 1996, Proceedings of ISSSTA'95 International Symposium on Spread Spectrum Techniques and Applications.

[11]  Jean-Paul M. G. Linnartz,et al.  Multi-Carrier Cdma In Indoor Wireless Radio Networks , 1994 .

[12]  P. W. Baier,et al.  Zero forcing and minimum mean-square-error equalization for multiuser detection in code-division multiple-access channels , 1996 .

[13]  Ramjee Prasad,et al.  Overview of multicarrier CDMA , 1997, IEEE Commun. Mag..

[14]  Davide Dardari,et al.  High-speed indoor wireless COFDM systems at 60 GHz: performance and design criteria , 1997, GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record.

[15]  Robert N. McDonough,et al.  Detection of signals in noise , 1971 .

[16]  Anja Klein,et al.  Linear Unbiased Data Estimation in Mobile Radio Systems Applying CDMA , 1993, IEEE J. Sel. Areas Commun..