Name
Title | ||
|---|---|---|
Adaptive Interference Suppression for DS-CDMA Systems Based on Interpolated FIR Filters With Adaptive Interpolators in Multipath Channels |
Abstract | ||
|---|---|---|
In this paper, we propose an adaptive linear-receiver structure based on interpolated finite-impulse response (FIR) filters with adaptive interpolators for direct-sequence code-division multiple-access (DS-CDMA) systems in multipath channels. The interpolated minimum mean-squared error (MMSE) and the interpolated constrained minimum-variance (CMV) solutions are described for a novel scheme, where the interpolator is rendered time-varying in order to mitigate multiple-access interference and multiple-path propagation effects. Based upon the interpolated MMSE and CMV solutions, we present computationally efficient stochastic gradient and exponentially weighted recursive least squares type algorithms for both receiver and interpolator filters in the supervised and blind modes of operation. A convergence analysis of the algorithms and a discussion of the convergence properties of the method are carried out for both modes of operation. Simulation experiments for a downlink scenario show that the proposed structures achieve a superior bit-error-rate convergence and steady-state performance to previously reported reduced-rank receivers at lower complexity. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1109/TVT.2007.899931 | Vehicular Technology, IEEE Transactions |
Keywords | Field | DocType |
FIR filters,code division multiple access,interference suppression,interpolation,mean square error methods,multipath channels,radiofrequency interference,recursive filters,spread spectrum communication,stochastic programming,wireless channels,DS-CDMA systems,adaptive interference suppression,adaptive interpolators,bit-error-rate convergence,exponentially weighted recursive least squares type algorithms,interpolated FIR filters,interpolated constrained minimum-variance solutions,interpolated minimum mean-squared error,multipath channels,multiple-access interference,multiple-path propagation effects,stochastic gradient,Adaptive algorithms,direct-sequence code-division multiple access (DS-CDMA),multiuser detection,reduced-rank receivers | Signal processing,Digital filter,Computer science,Control theory,Multiuser detection,Electronic engineering,Interference (wave propagation),Adaptive algorithm,Finite impulse response,Recursive least squares filter,Spread spectrum | Journal |
Volume | Issue | ISSN |
56 | 5 | 0018-9545 |
Citations | PageRank | References |
16 | 0.77 | 21 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Rodrigo C. de Lamare | 1 | 1461 | 179.59 |
| Raimundo Sampaio-Neto | 2 | 364 | 15.03 |
| de Lamare, R.C. | 3 | 652 | 33.42 |
| Sampaio-Neto, R. | 4 | 16 | 0.77 |