## Narrowband Interference Suppression in Spread Spectrum CDMA (1994)

Citations: | 16 - 1 self |

### BibTeX

@MISC{Poor94narrowbandinterference,

author = {H. Vincent Poor and Leslie A. Rusch},

title = {Narrowband Interference Suppression in Spread Spectrum CDMA},

year = {1994}

}

### Years of Citing Articles

### OpenURL

### Abstract

this paper is to provide an overview of these techniques. An excellent review of those methods developed prior to 1988 can be found in a survey paper authored by Milstein [12]. Thus, although we will review all of the methods that have been proposed, we will treat these earlier methods only briefly, and we will focus instead on those that have been developed more recently. It should also be noted that much of the work in this area has been motivated by the application of spread spectrum as an anti-jamming signaling method for military use; however it is equally applicable to the problem of NBI in cellular CDMA. Current research makes a more conscious effort to incorporate methodologies that allow for performance improvements when considering the spread signal as a CDMA signal, as we will discuss later. We begin, in the following section, with a brief review of NBI mitigation techniques based on the linear signal processing regimes of adaptive linear transversal filtering, and Fourier-domain filtering. These methods represent the original approaches to this problem, and they are quite well developed. Most of this paper, on the other hand, will be concerned with recently developed model-based techniques that employ non-standard signal processing methods to enhance the interference rejection capabilities in CDMA systems beyond those of standard methods. In particular, in the second section we consider techniques based on nonlinear filtering [15] in which the spread spectrum CDMA signal (which is digital) is modeled as a non-Gaussian noise in the interference suppression process. Further, in the third section we consider the situation in which the NBI is also a digital communications signal. In this situation, multiuser detection techniques [16] can be used to give quite ...

### Citations

694 | An Introduction to Signal Detection and Estimation - Poor - 1994 |

316 | Linear multiuser detectors for synchronous code-division multiple access channels
- Lupas, Verdu
- 1989
(Show Context)
Citation Context ...t, i.e., when the dominant source of signal corruption is the narrowband interferer. The near-far resistance is the asymptotic efficiency minimized over all possible interference energy levels, Lupas =-=[4]-=-. The optimal multiuser receiver has complexity that is exponential in the number of narrowband bits per SS bit. To reduce this computational burden several linear algorithms are proposed. The optimal... |

15 | Narrowband interference suppression in CDMA spread spectrum communications
- Rusch, Poor
- 1994
(Show Context)
Citation Context ...echniques has involved modeling the narrowband signal as either 1) a deterministic sinusoidal signal, or 2) an autoregressive signal, i.e., the output of a linear filter driven by AWGN, Masry et. al. =-=[2, 3]-=-. While these models greatly simplify analysis and have characteristics which capture the narrowbandedness of the signal, when the interference is in fact a digital communications signal they do not f... |

13 |
On the feasibility of a CDMA overlay for personal communications networks
- Milstein
- 1992
(Show Context)
Citation Context ...als encompassing a narrowband bit transition. The probability of error is therefore given by equation (13) with the new cross correlation. 3.2 Simulations We use the data provided in Milstein et. al. =-=[6] to -=-select parameters for the systems whose performance y Q(x) = 1 p 2�� R 1 x e \Gammav 2 =2 dv 10e-1 10e-2 10e-3 10e-4 10e-5 10e0 10e1 10e2 10e3 10e4 Probability of Error Narrowband Interference Pow... |

6 |
Closed-Form Analytical Results for the Rejection of Narrow-Band Interference
- Masry
- 1985
(Show Context)
Citation Context ...echniques has involved modeling the narrowband signal as either 1) a deterministic sinusoidal signal, or 2) an autoregressive signal, i.e., the output of a linear filter driven by AWGN, Masry et. al. =-=[2, 3]-=-. While these models greatly simplify analysis and have characteristics which capture the narrowbandedness of the signal, when the interference is in fact a digital communications signal they do not f... |

5 | Spread spectrum goes commercial - Schilling, Pickholz, et al. - 1990 |

4 |
Spread spectrum: Principles and possible application to spectrum utilization and allocation
- Utlaut
- 1978
(Show Context)
Citation Context ...on theory. 1 INTRODUCTION The use of spread spectrum (SS) systems for emerging personal communications services has been proposed, where the SS signal is overlaid on existing narrowband users, Utlaut =-=[1]-=-. For a single SS user in an additive white Gaussian noise (AWGN) channel, the optimal receiver is a filter matched to the signature sequence of the SS signal. However, the presence of narrowband user... |