Overloaded array processing with MMSE-SIC

Author

Hicks, J.E. ; Tsai, J. ; Reed, J.H. ; Tranter, W.H. ; Woerner, B.D.

Author_Institution

Mobile Portable Radio Res. Group, Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

Volume

2

fYear

2002

fDate

6/24/1905 12:00:00 AM

Firstpage

542

Abstract

This paper considers the application of minimum mean squared error linear space-time processing in tandem with successive interference cancellation (MMSE-SIC) to the extraction of symbol-asynchronous π/4-DQPSK signals with RRCOS pulse shaping (35%-75% rolloff) in overloaded environments. The performance is analyzed through simulation in terms of the symbol error rate ranked by cancellation order. The effect of signal excess-bandwidth, adjacent channel interference, the number of users, SNR, and array type are considered. The channel statistics of all users are assumed known.

Keywords

adjacent channel interference; array signal processing; differential phase shift keying; interference suppression; least mean squares methods; phase shift keying; quadrature phase shift keying; space-time adaptive processing; MMSE-SIC; RRCOS pulse shaping; adjacent channel interference; cancellation order; channel statistics; independent complex Gaussian vectors; linear space-time processing; minimum mean squared error; overloaded array processing; signal excess-bandwidth; simulation; successive interference cancellation; symbol error rate; symbol-asynchronous π/4-DQPSK signals; uniform circular array; Antenna arrays; Array signal processing; Delay; Filtering; Interchannel interference; Linear antenna arrays; Multiuser detection; Phased arrays; Pulse shaping methods; Shape;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th

Print_ISBN

0-7803-7484-3

Type

conf

DOI

10.1109/VTC.2002.1002539

Filename

1002539