Cooperative Communications in Wireless Networks - A Requested Relaying Protocol

Renk, Tobias; Kloeck, C.; Burgkhardt, D.; Jondral, Friedrich K.

doi:10.1109/istmwc.2007.4299037

Cited by 5 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After a few algebraic manipulations, the instantaneous probability of error, given that transmit antenna one was active, is reduced to 1 , which when conditioned upon the fading channels is a random variable with zero-mean and a variance of…”

Section: Conditional Error Probabilitymentioning

confidence: 99%

“…The information for each user is sent out not only by the user, but also by other collaborating users. This includes a family of configurations in which the information can be shared among transmitters and relayed to reach final destination in order to improve the system's overall capacity and coverage [1,2]. Recently, cooperative technologies have also made their way toward next generation wireless standards, such as IEEE 802.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance analysis of space shift keying (SSK) modulation with multiple cooperative relays

Mesleh

Ikki

Aggoune

et al. 2012

EURASIP J. Adv. Signal Process.

View full text Add to dashboard Cite

International audienceIn this article, space shift keying (SSK) modulation is used to study a wireless communication system when multiple relays are placed between the transmitter and the receiver. In SSK, the indices of the transmit antennas form the constellation symbols and no other data symbol are transmitted. The transmitter and the receiver communicate through a direct link and the existing relays. In this study, two types of relays are considered. Conventional amplify and forward relays in which all relays amplify their received signal and forward it to the destination in a round-robin fashion are considered. In addition, decode and forward relays in which the relays that correctly detect the source signal will forward the corresponding fading gain to the destination in pre-determined orthogonal time slots are studied. The optimum decoder for both communication systems are derived and performance analysis are conducted. The exact average bit error probability (ABEP) over Rayleigh fading channels is obtained in closed-form for a source equipped with two transmit antennas and arbitrary number of relays. Furthermore, simple and general asymptotic expression for the ABEP is derived and analyzed. Numerical results are also provided, sustained by simulations which corroborate the exactness of the theoretical analysis. It is shown that both schemes perform nearly the same and the advantages and disadvantages of each are discussed

show abstract

Section: Conditional Error Probabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance analysis of space shift keying (SSK) modulation with multiple cooperative relays

Mesleh

Ikki

Aggoune

et al. 2012

EURASIP J. Adv. Signal Process.

View full text Add to dashboard Cite

show abstract

“…Each user's information is sent out not only by the user but also by other collaborating users. This includes a family of configurations in which the information can be shared among transmitters and relayed to reach final destination to improve the systems overall capacity and coverage [1][2][3][4][5][6][7][8]. Several standardisation groups, such as IEEE 802.16j [9], include such technologies into their standards.…”

Section: Introductionmentioning

confidence: 99%

Space shift keying with amplify‐and‐forward MIMO relaying

Mesleh

Ikki

2013

Trans. Emerging Tel. Tech.

View full text Add to dashboard Cite

Space shift keying (SSK) is a multiple-input, multiple-output system where the indices of the transmit antennas form the constellation symbols and no other data symbol is transmitted. In this paper, amplify-and-forward (AF) multiple-input, multiple-output relaying techniques with an SSK system are proposed and analysed. Single and multiple relays are located between the source and the destination and used to forward the transmitted messages from the source to the destination. Conventional AF relaying in which all relays amplify their received signal and forward it to the destination at specific time slot and opportunistic AF relaying where only the best relay is activated and all other relays are kept silent are considered. The receiver, with a single receive antenna, applies optimum detector to retrieve the transmitted information bits. Closed-form bit error ratio expressions are provided for a source equipped with two transmit antennas. Additionally, a good approximate upper bound is derived for higher number of transmit antennas. The analytical results are validated through Monte Carlo simulation results. It is revealed that multiple relays can be considered to significantly enhance the performance of SSK system, and the diversity gain equals the number of existing relays.

show abstract

“…In multi-route networks in contrast, the source transmits information to several relays simultaneously and those relays retransmit information either with respect to a predefined transmission scheme or simultaneously. Hence, the destination receives information from several relays in addition to a direct path from source to relay [3,13]. In requested relaying systems § relays only retransmit source information if they have received a request from the destination.…”

Section: Introductionmentioning

confidence: 99%

“…In requested relaying systems § relays only retransmit source information if they have received a request from the destination. These strategies are involved for performance evaluation due to the variable nature of spectral efficiency [3,13].…”

Section: Introductionmentioning

confidence: 99%

General expression of outage probability in cooperative networks

Renk

Jaekel

Kloeck

et al. 2008

Trans Emerging Tel Tech

View full text Add to dashboard Cite

SUMMARYA general expression of outage probability in a wireless relay network with an arbitrary number of relays and selection combining at the destination is derived. This formula is then adopted to independent but not identically distributed channel coefficients and lower and upper bounds are developed. We study two relay schemes: the one-relay case and the two-relay case. The latter can further be divided into a two-phase and a three-phase transmission scheme which depend on the cooperation among the relays. For all considered cases, outage probabilities in Rayleigh fading environments are derived and analysed and it is demonstrated by numerical simulations that all relay protocols achieve full order of diversity. We further elaborate the impact of relay locations on outage probability. Finally, we discuss the required signal-to-noise ratio in order to achieve a predefined outage probability. With respect to the mentioned evaluation metrics the two-phase relaying scheme achieves by far the best performance, however, with the drawback of increased receiver complexity.

show abstract

Cooperative Communications in Wireless Networks - A Requested Relaying Protocol

Cited by 5 publications

References 13 publications

Performance analysis of space shift keying (SSK) modulation with multiple cooperative relays

Performance analysis of space shift keying (SSK) modulation with multiple cooperative relays

Space shift keying with amplify‐and‐forward MIMO relaying

General expression of outage probability in cooperative networks

Contact Info

Product

Resources

About