Bounds on the delay-constrained capacity of UWB communication with a relay node

Zeinalpour-Yazdi, Zolfa; Nasiri-Kenari, Masoumeh; Aazhang, Behnaam; Wehinger, J.; Mecklenbrauker, C.

doi:10.1109/twc.2009.080682

Cited by 7 publications

(8 citation statements)

References 19 publications

(28 reference statements)

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“…Case (i.1) occurs with probability 1 − p following from (14). Given thatm = 1, then ignoring h in in (9) results in the following decision variables at D: y…”

Section: Performance Analysismentioning

confidence: 99%

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A Symbol-by-Symbol Cooperative Diversity Scheme for Relay-Assisted UWB Communications with PPM

Abou-Rjeily

2013

IEEE J. Select. Areas Commun.

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In this paper, we propose a novel cooperation strategy for coherent Impulse-Radio Ultra-Wideband (IR-UWB) communication systems with one relay. While non-orthogonal cooperation in narrow-band wireless networks often requires deploying distributed space-time codes with joint encoding of several symbols at the source and relays and joint decoding of these symbols at the destination, the proposed non-orthogonal cooperation scheme constitutes the first known symbol-by-symbol-based scheme where cooperation is entirely realized within one symbol duration. This follows from the fact that the proposed strategy is adapted to the structure of the Pulse Position Modulation (PPM) that constitutes the most popular modulation scheme associated with UWB transmissions. We also propose a simple and efficient power allocation strategy that further boosts the performance of the proposed cooperation strategy. The error performance of the proposed scheme is evaluated analytically while simulations performed over the IEEE 802.15.3a UWB channel model are provided to support the theoretical results.

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“…Case (i.1) occurs with probability 1 − p following from (14). Given thatm = 1, then ignoring h in in (9) results in the following decision variables at D: y…”

Section: Performance Analysismentioning

confidence: 99%

“…In [12], an accurate BER analysis that is based on the characteristic function evaluation was provided over the realistic IEEE 802.15.4a channel model. Finally, addressing DF relaying with MB-OFDM-UWB systems, the error performance and power allocation were provided in [13] while an upper-bound on the capacity was derived in [14].…”

Section: Introductionmentioning

confidence: 99%

A Symbol-by-Symbol Cooperative Diversity Scheme for Relay-Assisted UWB Communications with PPM

Abou-Rjeily

2013

IEEE J. Select. Areas Commun.

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“…where Φ | (1) , for 0 ≤ < ′ − 2 and = ′ − 1 are given in (22) and (23), respectively. In these equations, from (3), ( ) is equal to…”

Section: ) Awgnmentioning

confidence: 99%

“…Specifically, they have presented the construction of a family of space-time codes which are suitable for TH-UWB with AF and DF protocols. In [2], symbol-error-rate (SER) performance analysis and optimum power allocation of MB-OFDM-UWB systems with DF cooperative protocol have been derived, and the upper bound on the capacity of this protocol has been addressed in [22]. Altogether, research for cooperative networks with UWB transmission is still largely unexplored, especially for the multipath fading propagation.…”

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confidence: 99%

Bit error probability analysis of UWB communications with a relay node

Zeinalpour-Yazdi

Nasiri-Kenari

Aazhang

2010

IEEE Trans. Wireless Commun.

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In this paper, the extension of cooperative communication to the context of TH-UWB is investigated. In particular, the average bit error probability (BEP) is provided for cooperative TH-UWB systems with decode-and-forward relaying protocol. In the considered relay network, UWB links among the nodes are modeled according to IEEE 802.15.4a standards. Our methodology is based on computing the Characteristic Function (CF) of the decision variable at the destination terminal. We use Gaussian quadrature numerical method to approximate the CF of interference component appeared in decision variable term. This technique permits to predict the system performance in different IEEE 802.15.4a defined channels with high accuracy and reasonable complexity. Numerical results show that significant improvement in the BEP of impulse radio UWB system is obtained by adding a relay node. The analytical expressions are also validated by computer simulations which confirm the accuracy of the approximations used in obtaining the BEP.Index Terms-Relay channel, ultra-wideband (UWB), IEEE 802.15.4a, Gaussian quadrature rule, error analysis.

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“…A similar BER analysis of single-relay DF systems was performed in [15] over the IEEE 802.15.4a channel model based on computing the characteristic function of the decision variable at the destination. The expected capacity and outage capacity of the single-relay DF scheme were also derived in [16]. The issues of power allocation and path selection were tackled in [17] in the context of DF noncoherent UWB systems.…”

Section: Introductionmentioning

confidence: 99%

Distributed Space-Time Codes for Full-Duplex IR-UWB Amplify-and-Forward Cooperation

Abou-Rjeily

2015

IEEE Trans. Wireless Commun.

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In this paper, we consider the problem of full-duplex (FD) relaying in the context of impulse-radio ultra-wideband (IR-UWB) communications. In particular, we propose two novel distributed space-time block codes (STBCs) suitable for the amplify-and-forward (AF) cooperation protocol with one and two relays. Despite the fact that FD relaying results in significant levels of interference between the transmit and receive antennas of each relay, it introduces new concepts to the problem of distributed STBC design. Compared to half-duplex (HD) STBC, FD-STBC is subject to an additional constraint that imposes the structure of the codewords while it offers the predominant advantage that resides in the possibility of including a smaller number of information symbols per codeword for achieving a full rate. We take advantage of this potential for constructing fully-diverse, full-rate and totally-real IR-UWB FD-STBCs that outperform the existing HD-STBCs for all practical levels of the residual self loop interference. In fact, for the sake of transmitting at full rate, the best known distributed HD-STBCs for the non-orthogonal AF protocol require the joint encoding/decoding of 4N r symbols where N r is the number of relays. On the other hand, the proposed FD-STBCs require embedding only N r + 2 symbols per codeword for transmitting at full rate. Following from this fact, not only the decoding complexity is reduced, but also the coding gains are improved resulting in enhanced performance levels.

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Bounds on the delay-constrained capacity of UWB communication with a relay node

Cited by 7 publications

References 19 publications

A Symbol-by-Symbol Cooperative Diversity Scheme for Relay-Assisted UWB Communications with PPM

A Symbol-by-Symbol Cooperative Diversity Scheme for Relay-Assisted UWB Communications with PPM

Bit error probability analysis of UWB communications with a relay node

Distributed Space-Time Codes for Full-Duplex IR-UWB Amplify-and-Forward Cooperation

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