Transmit Antenna Selection for Interference-Outage Constrained Underlay CR

Sarvendranath, Rimalapudi; Mehta, Neelesh B.

doi:10.1109/tcomm.2018.2831662

Cited by 14 publications

(13 citation statements)

References 23 publications

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“…Different interference constraints have been considered in the literature to protect the PRxs from excessive interference. These include the peak-interference constraint [3]- [7], which limits the instantaneous interference power at the PRxs, the interference-outage constraint [8]- [10], which limits the fraction of time for which instantaneous interference can exceed a interference power threshold at the PRx, and the averageinterference constraint [11]- [13], which limits the fadingaveraged interference power at the PRx. However, these limit the secondary performance.…”

Section: Impact Of Multiple Primaries and Partial Csi On Transmit Antmentioning

confidence: 99%

“…In underlay CR, TAS reduces the symbol error probability (SEP) [10]- [12] and increases the ergodic capacity [6], [7] compared to a single antenna system that uses the same number of RF chains. The choice of the antenna depends not only on the channel gain between the secondary transmitter (STx) and secondary receiver (SRx), but also on the channel gains between the STx and the PRxs and the interference constraint itself [6], [10]. In the following, we summarize the TAS rules studied in the literature for underlay CR.…”

Section: Impact Of Multiple Primaries and Partial Csi On Transmit Antmentioning

confidence: 99%

“…Instead, in [7], the STx adapts its transmit power and selects the antenna with the highest ratio of the STx-SRx and the STx to PRx (STx-PRx) channel power gains. SEP-optimal TAS rules are developed in [11] and [12] for an STx that is subject to the average-interference constraint, and in [10] for 1536-1276 © 2018 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.…”

Section: Impact Of Multiple Primaries and Partial Csi On Transmit Antmentioning

confidence: 99%

“…Given its stochastic nature, STx need not perfectly know the instantaneous channel power gains from it to all the PRxs, which is unlike the peak-interference constraint. Moreover, it does not significantly affect primary systems that are designed to handle co-channel interference or whose traffic is tolerant to disruptions [10].…”

Section: A Focus and Contributionsmentioning

confidence: 99%

“…Additionally, the partial CSI model and statistically nonidentical STx-PRx channel gain model are more general than the full CSI model assumed in [3]- [5]. Our paper differs in many ways compared to [10]. We consider the partial CSI model with multiple PRxs, which is more general that the full CSI model with single PRx considered in [10].…”

Section: A Focus and Contributionsmentioning

confidence: 99%

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Impact of Multiple Primaries and Partial CSI on Transmit Antenna Selection for Interference-Outage Constrained Underlay CR

Sarvendranath

Mehta

2019

IEEE Trans. Wireless Commun.

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Transmit antenna selection is a low-complexity multiple-antenna technique that exploits spatial diversity using only one radio frequency chain. We investigate it for an underlay cognitive radio system that operates in the presence of multiple primary receivers and is subject to a constraint on the interference outage it causes at any of the primary receivers. The selection is based on a practically motivated and general partial channel state information (CSI) model in which the secondary transmitter (STx) only knows the channel power gains to a subset of the primary receivers. We derive a novel and general antenna selection rule that provably minimizes the symbol error probability (SEP) of the secondary system. We also derive insightful analytical expressions for its average SEP and interference-outage probability. These apply to a general class of channel fading models and any number of transmit and receive antennas, and include the special cases in which the STx knows channel power gains of all or none of the primary receivers. Our numerical results bring out a new insensitivity of the average SEP of the optimal rule to the interference power threshold when the CSI available is partial.

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Section: Impact Of Multiple Primaries and Partial Csi On Transmit Antmentioning

confidence: 99%

Section: Impact Of Multiple Primaries and Partial Csi On Transmit Antmentioning

confidence: 99%

Section: Impact Of Multiple Primaries and Partial Csi On Transmit Antmentioning

confidence: 99%

Section: A Focus and Contributionsmentioning

confidence: 99%

Section: A Focus and Contributionsmentioning

confidence: 99%

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Impact of Multiple Primaries and Partial CSI on Transmit Antenna Selection for Interference-Outage Constrained Underlay CR

Sarvendranath

Mehta

2019

IEEE Trans. Wireless Commun.

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Frobenius Norm-Based Radio Propagation Path Selection Policy and Performance Analysis

Bitragunta

2023

Lecture Notes in Networks and Systems

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Asymptotic Analysis for Spectrum-Sharing Systems With TAS/MRC Using Extreme Value Theory: An Overlooked Aspect

et al. 2019

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We investigate the asymptotic behavior for an overlooked aspect of spectrum-sharing systems when the number of transmit antennas n t at the secondary transmitter (ST) grows to infinity. Considering imperfect channel state information (CSI), we apply the transmit antenna selection and the maximal-ratio combining techniques at the ST and the secondary receiver (SR), respectively. First, we obtain the signalto-noise ratio (SNR) distributions received by the SR under perfect and imperfect CSI conditions. Then we show that the SNR distributions are tail-equivalent in the sense that the right tails of the two distributions decay in the same rate as the number of transmit antennas n t grows to infinity. Based on the extreme value theory, when the transmit power of the ST is solely limited by the interference constraint, we show that the limiting SNR at the SR is Fréchet-distributed and the limiting rate scales as log(n t ). When the transmit power of ST is determined by both the maximal transmit power and the interference power constraints, the limiting SNR is Gumbel-distributed and the limiting rate scales as log(log(n t )). We further show that the average rate can be estimated by the corresponding easier-to-obtain outage rate. Numerical results indicate that the derived asymptotic rate expressions represent accurate approximations even when n t is ''not-solarge''. Finally, we study the robustness of the secondary transmissions by analyzing the corresponding average symbol error rates (SER) under general modulation and coding schemes. The findings indicate that the SER is Weibull distributed, when the maximal transmit power and interference power constraints are comparable.INDEX TERMS Spectrum sharing, extreme value theory, rate scaling law, symbol error rate.

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Transmit Antenna Selection for Interference-Outage Constrained Underlay CR

Cited by 14 publications

References 23 publications

Impact of Multiple Primaries and Partial CSI on Transmit Antenna Selection for Interference-Outage Constrained Underlay CR

Impact of Multiple Primaries and Partial CSI on Transmit Antenna Selection for Interference-Outage Constrained Underlay CR

Frobenius Norm-Based Radio Propagation Path Selection Policy and Performance Analysis

Asymptotic Analysis for Spectrum-Sharing Systems With TAS/MRC Using Extreme Value Theory: An Overlooked Aspect

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