System design approach for RSFQ multiuser detector

Author

Platov, K.Yu. ; Kidiyarova-Shevchenko, A.Yu. ; Zhao, H. ; Ottosson, T. ; Ström, E.

Author_Institution

Microelectron. & Nanoscience Dept., Chalmers Univ. of Technol., Gothenburg, Sweden

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

437

Lastpage

440

Abstract

The extraordinary speed of RSFQ circuits is attractive for the implementation of a successive interference canceller, which is one of the most effective types of multiuser detector. We present system design analysis, optimizing the bit error rate performance and targeting a doubling of the uplink capacity. A complete model is considered: a long-code asynchronous code division multiple access (CDMA) system with frequency-selective fading paths, 100 voice equivalent channels per sector and 10 resolvable multipath components. Assuming uniform quantization of input signals, we have shown that the realistic case of heavily loaded systems would require up to ten iterations to achieve reliable detection.

Keywords

3G mobile communication; code division multiple access; digital signal processing chips; error statistics; fading channels; interference suppression; multiuser detection; radiofrequency interference; superconducting processor circuits; telecommunication computing; 3G mobile communication systems; BER performance optimisation; DSP circuit; RSFQ multiuser detector; asynchronous code division multiple access; bit error rate performance; frequency-selective fading paths; long-code asynchronous CDMA system; successive interference canceller; system design approach; Bit error rate; Circuits; Design optimization; Detectors; Fading; Frequency conversion; Interference cancellation; Multiaccess communication; Performance analysis; System analysis and design;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.813891

Filename

1211635