Performance of an Echo Canceller and Channel Estimator for On-Channel Repeaters in DVB-T/H Networks

Nasr, Karim M.; Cosmas, J.; Bard, M.; Gledhill, J.

doi:10.1109/tbc.2007.903612

Cited by 81 publications

(63 citation statements)

References 11 publications

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“…In the case of FD-TWR-1TS, t min = t min,1 . t min,1 can be obtained by setting (35)- (40) to be no larger than the corresponding maximum transmit powers, solving the inequalities, and choosing the intersection of the results. Specifically, we can rearrange the inequalities to be polynomial with all positive coefficients.…”

Section: Case Imentioning

confidence: 99%

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Energy Efficiency Maximization of Full-Duplex Two-Way Relay With Non-Ideal Power Amplifiers and Non-Negligible Circuit Power

Cui

Zhang

et al. 2017

IEEE Trans. Wireless Commun.

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Abstract-In this paper, we maximize the energy efficiency (EE) of full-duplex (FD) two-way relay (TWR) systems under non-ideal power amplifiers (PAs) and non-negligible transmission-dependent circuit power. We start with the case where only the relay operates full duplex and two timeslots are required for TWR. Then, we extend to the advanced case, where the relay and the two nodes all operate full duplex, and accomplish TWR in a single timeslot. In both cases, we establish the intrinsic connections between the optimal transmit powers and durations, based on which the original non-convex EE maximization can be convexified and optimally solved. Simulations show the superiority of FD-TWR in terms of EE, especially when traffic demand is high. The simulations also reveal that the maximum EE of FD-TWR is more sensitive to the PA efficiency, than it is to self-cancellation. The full FD design of FD-TWR is susceptible to traffic imbalance, while the design with only the relay operating in the FD mode exhibits strong tolerance.Index Terms-Energy efficiency, full-duplex, non-ideal power amplifier, non-negligible circuit power, two-way relay.

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Section: Case Imentioning

confidence: 99%

“…, where h i,i 2 is dependent on the specific cancellation method implemented at node i, e.g., PS or PSAC [35].…”

mentioning

confidence: 99%

Energy Efficiency Maximization of Full-Duplex Two-Way Relay With Non-Ideal Power Amplifiers and Non-Negligible Circuit Power

Cui

Zhang

et al. 2017

IEEE Trans. Wireless Commun.

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“…The service antenna is placed on the street-level or indoors with wider beam pattern towards the covered area while pointing away from the backhaul antenna. The interference power can then be maintained at a much lower level than in mobile relays due to increased distance and physical obstacles between the antennas, antenna polarization and directivity, or interference removal by using various signal processing algorithms [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

On the feasibility of full-duplex relaying in the presence of loop interference

Riihonen¹,

Werner²,

Wichman³

et al. 2009

2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications

145

112

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We consider a two-hop infrastructure-based relay link with three transmit power allocation methods. Both amplify-andforward and decode-and-forward protocols are studied. Fundamentally, a relay can operate either in a full-duplex or in a half-duplex mode. The performance in full-duplex relaying is degraded due to loop interference from the relay output to the relay input. On the other hand, the half-duplex mode eliminates the loop interference, but this reduces the end-to-end rate. In this paper, we study the feasibility of the full-duplex mode in terms of end-to-end capacity. In particular, we evaluate break-even loop interference levels, below which the fullduplex mode outperforms the half-duplex mode. The analysis shows that the full-duplex mode is feasible in the presence of reasonably high loop interference power and can offer higher capacity than the half-duplex mode.

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“…With the help of high isolation antennas and analog cancellers, the strength of crosstalk interference at the RS is already significantly reduced, paving the way for further digital cancellation. In the literature, various techniques for digital cross-talk cancellation based on the estimation of the coupling channel from the transmit to the receive antenna of the RS have been proposed [5]- [7]. However, all of these techniques require the RS to transmit dedicated pilots, such as the pseudo-noise sequences, for coupling channel estimation, which not only changes the original signal structure of the physical layer but also results in interference at the destination.…”

Section: Introductionmentioning

confidence: 99%

A New Coupling Channel Estimator for Cross-Talk Cancellation at Wireless Relay Stations

Zhang

et al. 2009

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

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In this paper, we are concerned with cross-talk interference from the transmit to the receive antenna of a wireless channel-reuse-relay-station (CRRS) that forwards signals over the same channel as it receives signals. By estimating the coupling channel from the transmit to the receive antenna, the proposed scheme performs cross-talk reconstruction and cancellation at the RS. Different from the conventional coupling channel estimation schemes that require the RS to transmit dedicated pilots, the proposed scheme utilizes the random forwarded signals of the RS as pilots for coupling channel estimation, thus avoiding changing the structure of the RS's transmitted signal. For a general RS with any relay mechanism, we propose a least square coupling channel estimator; for an RS with the decode-and-forward mechanism, we further propose a minimum mean-square error coupling channel estimator. Also, we investigate the performance of the proposed cross-talk cancellation scheme with both analytical and numerical results. Globecom 2009This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved. Abstract-In this paper, we are concerned with cross-talk interference from the transmit to the receive antenna of a wireless channel-reuse-relay-station (CRRS) that forwards signals over the same channel as it receives signals. By estimating the coupling channel from the transmit to the receive antenna, the proposed scheme performs cross-talk reconstruction and cancellation at the RS. Different from the conventional coupling channel estimation schemes that require the RS to transmit dedicated pilots, the proposed scheme utilizes the random forwarded signals of the RS as pilots for coupling channel estimation, thus avoiding changing the structure of the RS's transmitted signal. For a general RS with any relay mechanism, we propose a least square coupling channel estimator; for an RS with the decode-andforward mechanism, we further propose a minimum meansquare error coupling channel estimator. Also, we investigate the performance of the proposed cross-talk cancellation scheme with both analytical and numerical results.

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Performance of an Echo Canceller and Channel Estimator for On-Channel Repeaters in DVB-T/H Networks

Cited by 81 publications

References 11 publications

Energy Efficiency Maximization of Full-Duplex Two-Way Relay With Non-Ideal Power Amplifiers and Non-Negligible Circuit Power

Energy Efficiency Maximization of Full-Duplex Two-Way Relay With Non-Ideal Power Amplifiers and Non-Negligible Circuit Power

On the feasibility of full-duplex relaying in the presence of loop interference

A New Coupling Channel Estimator for Cross-Talk Cancellation at Wireless Relay Stations

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