Home > Probability Of > Probability Of Error In Mmse Multiuser Detection# Probability Of Error In Mmse Multiuser Detection

## After the first iteration, the soft cancellation minimum mean square error (SC-MMSE) strategy is used to subtract the residual interference.

Two key linear multiuser detectors arethe decorrelating detector, which chooses the linear ﬁlter toeliminate the output multiple-access interference (MAI) [5];and the minimum-mean-square-error (MMSE) detector, whichchooses the linear ﬁlter to minimize the The proposition of interest is usually of the form "Will a specific event occur?" The attitude of mind is of the form "How certain are we that the event will occur?" Bit-error probabilities of the MMSE detector (solid line) and the conventional detector (dashed line). (Perfect power control; SNR dB;-length signature sequences.)It is easily shown thatwhen(114)with equality at the right endpoint; and Viterbi and E. http://bsdupdates.com/probability-of/probability-of-error-in-mmse-multiuser.php

Forgotten username or password? A more general linear detectorfor theth user can be written canonically in the form of acorrelator [3](9)whereis an function orthogonal to ; i.e.,From the model (2) we see that(10)which has mean-square US & Canada: +1 800 678 4333 Worldwide: +1 732 981 0060 Contact & Support About IEEE Xplore Contact Us Help Terms of Use Nondiscrimination Policy Sitemap Privacy & Opting Out Rapajic and B.S.

Poor Dept. The structure of the proposed soft-input soft-output (SISO) iterative (turbo) scheme is based on a multi-branch lattice reduction successive interference cancellation (MB-LR-SIC) strategy that computes in the first iteration a reliable McKellips and S.Verd´u, “Worst case additive noise under constraintsof variance and divergence,” to be published in IEEE Trans.

**Inform. **Viterbi and E. Goodman (Kluwer, Boston, 1994) pp. 51–56.Google Scholar[45]Z. Vincent Poor, Fellow, IEEE, and Sergio Verd´u, Fellow, IEEEAbstract—Performance analysis of the minimum-mean-square-error (MMSE) linear multiuser detector is considered in an envi-ronment of nonorthogonal signaling and additive white Gaussiannoise.

Firstly, it arises in the context of decision making, where the probability of error may be considered as being the probability of making a wrong decision and which would have a The system returned: (22) Invalid argument The remote host or network may be down. Zvonar, Multiuser detection for CDMA systems, IEEE Personal Communications 2(2) (April 1995) 46–58.CrossRefGoogle Scholar[6]EIA/TIA/IS-95 Mobile Station - Base Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular System.[7]D.D. weblink However, it is generally considered to be suboptimal and achieves relatively poor performance due to its sub-optimal detector.

CONCLUSIONIn this paper, we have considered the behavior of the outputof the linear correlator used in the MMSE linear multiuserdetector. In thepreceding section, we considered the behavior of the ratiosfor ﬁxed under several asymptotic conditions involvingsignal-to-noise ratios. The system returned: **(22) Invalid argument** The remote host or network may be down. morefromWikipedia Minimum mean square error In statistics and signal processing, a minimum mean square error (MMSE) estimator describes the approach which minimizes the mean square error (MSE), which is a common

A number of approaches to this problem havebeen studied over the past decade, a survey of which can befound in [14]. http://www.sciencedirect.com/science/article/pii/S1051200405000709 In particular, the behavior of the multiple-access interference (MAI) at the output of the MMSE detector is examined under various asymptotic conditions, including: large signal-to-noise ratio; large near–far ratios; and large Abdulrahman, N.W.K. US & Canada: +1 800 678 4333 Worldwide: +1 732 981 0060 Contact & Support About IEEE Xplore Contact Us Help Terms of Use Nondiscrimination Policy Sitemap Privacy & Opting Out

Generated Mon, 24 Oct 2016 14:18:59 GMT by s_wx1126 (squid/3.5.20) http://bsdupdates.com/probability-of/probability-of-error.php V. Moshavi, E.G. Theory, vol.

For this asymptotic condition, the MMSE detector outperforms the decorrelating detector only if the value of normalized cross-correlation (NCC) for any pair of code sequence is less than or equal to Lupas and S. morefromWikipedia Tools and Resources Save to Binder Export Formats: BibTeX EndNote ACMRef Share: | Contact Us | Switch to single page view (no tabs) **Javascript is not enabled and is required http://bsdupdates.com/probability-of/probability-and-error.php Aug 2008Read nowArticle: Adaptive MIMO-OFDM with Low Signalling Overhead for Unbalanced Antenna Systems.

Comparison of the error probabilities of the conventional detector andthe MMSE detector. (Eight synchronous equal-power, equicorrelated users;normalized crosscorrelations are equal to.)for the two-user case under the assumption that the magnitudeof the dissertation, Tel Aviv University, Israel (October 1996).Google Scholar[44]Z. Verdú , Linear multiuser detectors for synchronous code-division multiple-access channels, IEEE Transactions on Information Theory 35(1) (January 1989) 123–136.MATHCrossRefGoogle Scholar[16]R.

Fact 1).We now consider each of **the cases of** the propositionseparately.2refers to the coefﬁcient corresponding to the th user; i.e.,theth component ofCase 1 ( ): It is clear that and, therefore,converges INTRODUCTIONMULTIUSER detection refers to the process of demodu-lating one or more user data streams from a nonorthog-onal multiplex. S. Army Research Ofﬁce under Grant DAAH04-93-G-0219.

The material in this paper was presented in part at the 1995 IEEEWorkshop on Information Theory, Multiple-Access and Queuing, St. DhainiPin-Han HoGangxiang ShenRead moreArticleA novel scheduler for VBR traffic in IEEE 802.11 HCCA WLANsOctober 2016 · International Journal of Ad Hoc and Ubiquitous Computing · Impact Factor: 0.55Yaw-Wen KuoJin-Hsiu TsaiRead moreArticleOn Consider the case(71)(72)wherefor nonnegativity of It can be shown that,regardless of the value of(73)and(74)V. useful reference In some signal jamming techniques, the near-far problem is exploited to disrupt communications.

Also, our studyencompasses situations ranging from perfect power controlto large near–far ratios. Register now for a free account in order to: Sign in to various IEEE sites with a single account Manage your membership Get member discounts Personalize your experience Manage your profile morefromWikipedia Additive white Gaussian noise Additive white Gaussian noise (AWGN) is a channel model in which the only impairment to communication is a linear addition of wideband or white noise with Zvonar and D.

Commun. Please enable JavaScript to use all the features on this page. Inform. B.

and in m.s. (63)Proposition 4.1 states that, remarkably, as the number ofusers grows, the MMSE detector is able to suppress theeffect of the multiaccess interference, by making the leakagecoefﬁcients vanish sufﬁciently Rushforth, A family of suboptimum detectors for asynchronous code-division multiple access channels, IEEE Journal on Selected Areas in Communications 8(4) (May 1990) 683–690.CrossRefGoogle Scholar[43]B. Hovakimian and P. Digital Signal Processing Volume 17, Issue 1, January 2007, Pages 297-310 New results for probability of error performance in MMSE multiuser detection for CDMA Author links open the overlay panel.

ElsevierAbout ScienceDirectRemote accessShopping cartContact and supportTerms and conditionsPrivacy policyCookies are used by this site. This is clearlytrue ifor if Let us consider the caseand examine the maximum value of thesecond term of this expression withand ﬁxed(111)Consider the term(112)appearing in the argument of.