Performance of UWB Linked Relay Network with Time-Reversed Transmission in the Presence of Channel Estimation Error

Zeinalpour-Yazdi, Zolfa; Nasiri-Kenari, Masoumeh; Aazhang, Behnaam

doi:10.1109/twc.2012.061912.111866

Cited by 9 publications

(8 citation statements)

References 24 publications

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“…References [20] and [21] propose one-way UWB relaying for time-hopped UWB transmission schemes. Furthermore, [22], [23] consider two-way relaying for transmit-reference UWB communication.…”

Section: A Related Work and Contributionsmentioning

confidence: 99%

Multiuser Two-Way Relaying Schemes for UWB Communication

Ahmadian

Lampe

Mietzner

2014

IEEE Trans. Wireless Commun.

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In this paper we propose multiuser two-way relaying strategies for pairwise internode communication in a network consisting of ultra-wideband (UWB) transceivers with limited signal processing capability, via a central relay unit. We propose reducing the complexity associated with the design of filters at the relay by using pre/post-rake processing in conjunction with optimized filtering at the relay. Two relaying strategies relevant to multipath fading channels, namely detect-and-forward and filterand-forward with self-interference cancelation, are considered. For both methods, we start with a convex optimization problem formulation with closed-form solutions, then extend the design to the more general case which is a non-convex problem and use an alternating optimization algorithm to solve the design problems. Furthermore, for both design schemes widely linear design formulations are devised. The presented numerical results demonstrate the capability of the proposed design schemes in establishing a reliable communication link between nodes with limited signal processing power and in absence of a direct link.Index Terms-Detect-and-forward relaying, filter-and-forward relaying, intersymbol interference, multi-way relaying, multiuser interference, multiuser two-way relaying, pre-rake filtering, selfinterference cancelation, ultra-wideband (UWB), UWB relay communication.

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“…References [20] and [21] propose one-way UWB relaying for time-hopped UWB transmission schemes. Furthermore, [22], [23] consider two-way relaying for transmit-reference UWB communication.…”

Section: A Related Work and Contributionsmentioning

confidence: 99%

Multiuser Two-Way Relaying Schemes for UWB Communication

Ahmadian

Lampe

Mietzner

2014

IEEE Trans. Wireless Commun.

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“…the system without relay), the same power P T is evenly split between source and relay in the relaying system. The maximum value of P T is computed taking into account the limits imposed by FCC [13] on the power spectral density of the transmitted signal (−41.3 dBm/MHz), while the noise PSD is set at N 0 = −114 dBm/MHz (the same value adopted in [27]). In all the subsequent figures, it is assumed that the vectors β u , for u = 0, 1, .…”

Section: Simulation Resultsmentioning

confidence: 99%

“…We expect such an approximation to be good at high signalto-noise ratios. Based on (27), the decision rule then reads…”

Section: Detection Strategies At the Relaymentioning

confidence: 99%

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Code-Multiplexing-Based One-Way Detect-and-Forward Relaying Schemes for Multiuser UWB MIMO Systems

D’Amico

2017

IEEE Trans. Veh. Technol.

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In this paper, we consider decode-and-forward (DF) one-way relaying schemes for multiuser impulse-radio ultrawideband (UWB) communications. We assume low-complexity terminals with limited processing capabilities and a central transceiver unit (i.e., the relay) with a higher computational capacity. All nodes have a single antenna differently from the relay in which multiple antennas may be installed. In order to keep the complexity as low as possible, we concentrate on noncoherent transceiver architectures based on multiuser code-multiplexing transmitted-reference schemes. We propose various relaying systems with different computational complexity and different levels of required channel knowledge. The proposed schemes largely outperform systems without relay in terms of both bit error rate (BER) performance and coverage

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“…Cho et al [22] introduced the concept of cooperative dual-hop AF relaying scheme in IR-UWB system, whose results showed better performance than without using relay scheme. Maichalernnukul [25] discussed the BER performance of IR-UWB system using multi-antenna relay technology into dual-hop system, while Yazdi [11,26] investigated the BER performance of IR-UWB system using DF relay protocol. Maichalernnukul [25] discussed the BER performance of IR-UWB system using multi-antenna relay technology into dual-hop system, while Yazdi [11,26] investigated the BER performance of IR-UWB system using DF relay protocol.…”

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confidence: 99%

Performance analysis of impulse‐radio ultra‐wideband energy detector system using cooperative dual‐hop amplify and forward strategy

Hazra

Tyagi

2015

Int J Communication

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A novel analytical representation of bit error rate (BER) performance of an impulse-radio ultra-wideband energy detector on-off keying system using cooperative dual-hop amplify and forward relay technology, with various diversity combining schemes over IEEE 802.15.4a environment is presented in this paper. In particular, the approximate expressions based on energy detection principle are derived for various diversity combining cases, namely linear optimal combining, linear combining, and selective combining. Simulation results depict an improvement in BER performance, with increase in number of relay paths (L) and decrease in number of frames per symbol (N f ). Furthermore, the BER performance of the impulse-radio ultra-wideband energy detector on-off keying system improves substantially using dual-hop cooperative amplify and forward scheme, compared with that of non-cooperative or single link scenario. Among the diversity combining schemes, linear optimal diversity combining performs better when compared with linear diversity combining and selective combining. The analytical BER expressions are validated with the simulation results, which confirm the accuracy and precision in approximation used in the investigation of BER. energy detector (ED) receiver is introduced, which works by squaring the received signal followed by integration and detection through decision device [8][9][10].Owing to the strict guidelines issued by the Federal Communications Commission [1], UWB systems can operate at a maximum transmit power spectral density (PSD) of 41.3 dBm/MHz in order to avoid interference with other existing technologies. The low PSD of UWB signals not only limits it from achieving a wide coverage area but also makes its performance sensitive to distance [11,12]. Hence, to overcome such weaknesses, cooperative technology was introduced, which emerged as the perfect scheme to improve quality of service, coverage area, transmission reliability, and power efficiency [13,14].The simplest form of cooperative network, that is, a relay network, was first introduced by Meulen [15] and Gamal [16]. In cooperative technology, cooperative terminals or nodes share information and other resources through antennas, to create a virtual array through distributed transmission. Cooperative relay strategy protocols can be classified as amplify and forward (AF), detect and forward, and decode and forward (DF) [17,18]. The authors [19][20][21] have extended the use of AF and DF relay strategies in IR-UWB systems. Cho et al. [22] introduced the concept of cooperative dual-hop AF relaying scheme in IR-UWB system, whose results showed better performance than without using relay scheme. Among the previous contributions, Hamdi [23,24] analyzed the BER performance of IR-UWB differential transmitted reference system using dual-hop and multihop relay strategy. Maichalernnukul [25] discussed the BER performance of IR-UWB system using multi-antenna relay technology into dual-hop system, while Yazdi [11,26] investigated the BER performance of IR-UWB...

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Performance of UWB Linked Relay Network with Time-Reversed Transmission in the Presence of Channel Estimation Error

Cited by 9 publications

References 24 publications

Multiuser Two-Way Relaying Schemes for UWB Communication

Multiuser Two-Way Relaying Schemes for UWB Communication

Code-Multiplexing-Based One-Way Detect-and-Forward Relaying Schemes for Multiuser UWB MIMO Systems

Performance analysis of impulse‐radio ultra‐wideband energy detector system using cooperative dual‐hop amplify and forward strategy

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