Higher order statistics of antenna subset diversity

Win, Moe Z.; Mallik, Ranjan K.; Chrisikos, G.

doi:10.1109/twc.2003.816774

Cited by 52 publications

(28 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…From this pdf one can easily obtain the CDF (25) By changing the order of integration and using a change of variables, we also obtain the following more compact form: (26) where and are the Euler gamma function and the incomplete gamma function, respectively.…”

Section: Appendix a Composite Rayleigh Fading And Log-normal Shadowinmentioning

confidence: 99%

See 1 more Smart Citation

Slow Adaptive $M$-QAM With Diversity in Fast Fading and Shadowing

Conti

Win

Chiani

2007

IEEE Trans. Commun.

110

View full text Add to dashboard Cite

Abstract-This paper investigates the performance of adaptive -ary quadrature amplitude modulation (QAM) with antenna subset diversity. We consider a slow adaptive modulation (SAM) technique that adapts the constellation size to the slow variation of the channel due, for example, to shadowing. The proposed SAM technique is more practical than conventional fast adaptive modulation (FAM) techniques that require adaptation to fastfading variations. Our results show that the SAM technique can provide a substantial increase in throughput with respect to fixed schemes while maintaining an acceptable low bit-error outage. We also compare SAM and FAM techniques, showing that the throughput of SAM can be, in many practical cases, close to that of FAM, despite the fact that SAM is less complex and requires a lower feedback rate. For example, using a set of possible modulations {4,16,64}-QAM with dual-branch maximal ratio combining reception, 5% outage at a bit-error probability of 10 02 and a median signal-to-noise ratio of 22 dB, SAM is capable of improving the mean spectral efficiency of fixed schemes from about 1.9 to 4.7 b/s/Hz, which is close to the 5.5 b/s/Hz achieved by FAM.

show abstract

Section: Appendix a Composite Rayleigh Fading And Log-normal Shadowinmentioning

confidence: 99%

“…We analyze the SAM performance for coherent reception of -QAM with ASD, which uses only a subset of the total available diversity branches [26]- [29]. As a benchmark, we start by analyzing the capacity of adaptive transmission schemes with maximal ratio combining (MRC) in composite Rayleigh fading and shadowing channels.…”

mentioning

confidence: 99%

Slow Adaptive $M$-QAM With Diversity in Fast Fading and Shadowing

Conti

Win

Chiani

2007

IEEE Trans. Commun.

110

View full text Add to dashboard Cite

show abstract

“…Higher order moments (i.e., third and above) are also useful in signal processing algorithms for signal detection, classification, and estimation and can play a fundamental role in understanding the performance of wideband communications systems in the presence of fading [17]. Using the well-known inequality for positive RVs,…”

Section: Moments Of the End-to-end Snrmentioning

confidence: 99%

“…Although the moments of all orders are finite and can be evaluated in closed-form using the analysis of Section III, in practice only a finite number Q can be used truncating the series in (17) as…”

Section: Padé Approximants and Average Error Ratesmentioning

confidence: 99%

Multihop communications with fixed-gain relays over generalized fading channels

Karagiannidis

Zogas

Sagias

et al.

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04.

View full text Add to dashboard Cite

Abstract-Efficient performance bounds for multihop wireless communications systems with non-regenerative fixed-gain relays operating over non-identical generalized fading channels, are presented. More specifically, the end-to-end signal-to-noise ratio (SNR) is formulated and upper bounded by using the well-known inequality between harmonic and geometric mean of positive random variables. Based on this bound, the moments of the endto-end SNR for Rayleigh, Nakagami-m, and Rice fading channels, are obtained in simple closed-forms. Furthermore, the outage performance and the average error probability for coherent and non-coherent modulation schemes are also studied using the moment-generating function (MGF) approach. The proposed method for the evaluation of the MGF is based on the Padé approximants theory. Moreover, new expressions are derived for the gain of previously proposed "semi-blind" relays. These expressions are used in numerical and computer simulations examples, to verify the accuracy and to show the tightness of the proposed bounds.

show abstract

“…The EGC output moments are important for several reasons. First, purely moment-based measures such as the average output SNR and the amount of fading are commonly used to characterize diversity systems; for example, higher-order moments are derived for certain diversity systems [14]. Second, more widely used performance measures such as the average bit error rate (BER) (which is appropriate for digital modulations) and the outage probability are typically computed using the pdf or the mgf (which are not available in this case).…”

Section: Introductionmentioning

confidence: 99%

Moment based analysis of equal gain combiner in equally correlated Nakagami-m fading channels

Chen¹,

Tellambura

IEEE Wireless Communications and Networking Conference, 2005

View full text Add to dashboard Cite

Abstract-Moments of the equal gain combiner (EGC) output signal-to-noise ratio (SNR) are only known for independent and exponentially correlated Nakagami-m fading channels. In this paper, we derive the moments of the EGC output SNR in equally correlated Nakagami-m fading channels. Our moment expressions can be used to evaluate the outage and the average error rate of EGC as well as purely moments-based measures such as the average output SNR and the amount of fading as functions of the fading correlation. Numerical results that illustrate the effect of fading correlation on the distribution of the EGC output SNR are also provided. The average output SNR increases with the fading correlation.

show abstract

Higher order statistics of antenna subset diversity

Cited by 52 publications

References 7 publications

Slow Adaptive $M$-QAM With Diversity in Fast Fading and Shadowing

Slow Adaptive $M$-QAM With Diversity in Fast Fading and Shadowing

Multihop communications with fixed-gain relays over generalized fading channels

Moment based analysis of equal gain combiner in equally correlated Nakagami-m fading channels

Contact Info

Product

Resources

About