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## Downlink distributed beamforming through relay network (2009)

Venue: | Proc. IEEE Globecom |

Citations: | 3 - 1 self |

### Citations

2004 | Cooperative diversity in wireless networks: Efficient protocols and outage behavior
- Laneman, Tse, et al.
- 2004
(Show Context)
Citation Context ...y used. Traditionally, to introduce diversity, multiple copies of signals are created that span time, frequency or space [1]. A recent technique to introduce diversity into the system was proposed in =-=[2]-=- [3], in which multiple spatially separated communication devices (nodes) cooperate to improve the quality of communications between source and destination. Such systems can introduce diversity into t... |

445 | Fading Relay Channels: Performance Limits and Space-Time Signal Design
- Nabar, Bolcskei, et al.
(Show Context)
Citation Context ...stems can introduce diversity into the system by using cooperating nodes to relay information to the destination after some delay. Several protocols to accomplish the task have been introduced in [2] =-=[4]-=-, of which Amplify and Forward (AF) has been shown to achieve full diversity. These systems broadcast signals from a source to a set of relays which then forward onto a destination. In the literature,... |

430 | User cooperation diversity–Part I: System description
- Sendonaris, Erkip, et al.
- 2003
(Show Context)
Citation Context ...ed. Traditionally, to introduce diversity, multiple copies of signals are created that span time, frequency or space [1]. A recent technique to introduce diversity into the system was proposed in [2] =-=[3]-=-, in which multiple spatially separated communication devices (nodes) cooperate to improve the quality of communications between source and destination. Such systems can introduce diversity into the s... |

217 |
Solution of the multiuser downlink beamforming problem with individual SINR constraints
- Schubert, Boche
- 2004
(Show Context)
Citation Context ...ar precoding/decoding design has been studied for the uplink in [6], and for the downlink in [7] [8]. The signal processing involved in the uplink beamforming is simpler than that of the downlink [9] =-=[10]-=-. Thus, uplink-downlink duality is an important tool to simplify downlink system design. 1This research was supported in part by Defense R&D Canada. Recently, the problem of transmission over a broadc... |

152 | Linear precoding via conic optimization for fixed MIMO receivers
- Wiesel, Eldar, et al.
- 2006
(Show Context)
Citation Context ... achieve full diversity. These systems broadcast signals from a source to a set of relays which then forward onto a destination. In the literature, the broadcast channel has been studied in depth. In =-=[5]-=-, the design of linear precoders for fixed MIMO receivers is considered using SINR constraints. The MMSE linear precoding/decoding design has been studied for the uplink in [6], and for the downlink i... |

126 | Joint optimal power control and beamforming in wireless networks using antenna arrays
- Ra'lhid-Farrokhi, Tassiulas, et al.
- 1998
(Show Context)
Citation Context ...linear precoding/decoding design has been studied for the uplink in [6], and for the downlink in [7] [8]. The signal processing involved in the uplink beamforming is simpler than that of the downlink =-=[9]-=- [10]. Thus, uplink-downlink duality is an important tool to simplify downlink system design. 1This research was supported in part by Defense R&D Canada. Recently, the problem of transmission over a b... |

105 | Transmit beamforming for physical-layer multicasting
- Sidiropoulos, Davidson, et al.
- 2006
(Show Context)
Citation Context ...1. 3. Apply (12) to optimize the precoder with the current relay weights fixed. 4. Solve (27) to minimize the relay sum power. In case there is no rank one solution, apply the randomization method in =-=[20]-=-. 5. If the relay sum power is sufficiently close to a fixed point, or else if a predetermined number of iterations is exceeded, then stop. Otherwise go back to Step 3. We remark that since the transm... |

86 | Network beamforming using relays with perfect channel information,” Information Theory
- Jing, Jafarkhani
- 2009
(Show Context)
Citation Context ...fense R&D Canada. Recently, the problem of transmission over a broadcast channel has been applied to the above problem of cooperation, where relays cooperate so as to form a beam towards the receiver =-=[11]-=-, known as distributed beamforming. In distributed beamforming, amplitudes and phases of transmitted signals are coherently combined at the receiver [12]. In [13], rate maximization for a parallel rel... |

75 | Transceiver optimization for multiuser MIMO systems
- Serbetli, Yener
- 2004
(Show Context)
Citation Context ...en studied in depth. In [5], the design of linear precoders for fixed MIMO receivers is considered using SINR constraints. The MMSE linear precoding/decoding design has been studied for the uplink in =-=[6]-=-, and for the downlink in [7] [8]. The signal processing involved in the uplink beamforming is simpler than that of the downlink [9] [10]. Thus, uplink-downlink duality is an important tool to simplif... |

72 |
Optimal and suboptimal transmit beamforming,”
- Bengtsson, Ottersten
- 2001
(Show Context)
Citation Context ...to (12) establishes a lower bound to the problem (10). Only when (12) has a solution with Ti, i = 1, . . . ,M all rank one will (10) achieve the lower bound. Using arguments similar to those found in =-=[18]-=-, it can be proven that there always exists at least one solution to (12) with rank(Tk) = 1, k = 1, . . . ,M . This can be formalized as: Lemma 1 If the relaxed problem of (10) is feasible, (12) alway... |

67 | Distributed beamforming for relay networks based on second-order statistics of the channel state information
- Havary-Nassab, Shahbazpanahi, et al.
- 2008
(Show Context)
Citation Context ...d beamforming, amplitudes and phases of transmitted signals are coherently combined at the receiver [12]. In [13], rate maximization for a parallel relay network with noise correlation is studied. In =-=[14]-=-, a distributed beamforming system with a single transmitter and receiver and multiple relay nodes is studied, and second order statistics of the channel are employed to design the optimal relay beamf... |

44 | Grassmannian beamforming for mimo amplify-and-forward relaying,”
- Khoshnevis, Yu, et al.
- 2008
(Show Context)
Citation Context ...P) and solved through a semidefinite relaxation technique. In [16], a distributed beamforming scheme with two relays is proposed which has the advantage of limited feedback and improved diversity. In =-=[17]-=-, with limited feedback and assuming perfect CSI, beamforming codebook design based on Grassmanian codebook for multiple-input multiple output (MIMO) amplifyand-forward (AF) relay system is proposed. ... |

30 |
Joint linear transmitter and receiver design for the downlink of multiuser MIMO systems
- Zhang, Wu, et al.
- 2005
(Show Context)
Citation Context ...design of linear precoders for fixed MIMO receivers is considered using SINR constraints. The MMSE linear precoding/decoding design has been studied for the uplink in [6], and for the downlink in [7] =-=[8]-=-. The signal processing involved in the uplink beamforming is simpler than that of the downlink [9] [10]. Thus, uplink-downlink duality is an important tool to simplify downlink system design. 1This r... |

25 |
Multiple peerto-peer communications using a network of relays
- Fazeli-Dehkordy, Shahbazpanahi, et al.
- 2009
(Show Context)
Citation Context ...irst two iterations result in the largest gain, and performance gain diminishes as the number of iterations increases. Since the recently proposed distributed beamforming systems as described in [14] =-=[15]-=- have not been designed for multi-antenna basestations, they cannot be directly compared. It is also worth noting that the computational complexity of semidefinite programming is O((M + R2)3.5) in the... |

21 |
Downlink sumMSE transceiver optimization for linear multi-user MIMO systems
- Schubert, Shi, et al.
- 2005
(Show Context)
Citation Context ...the design of linear precoders for fixed MIMO receivers is considered using SINR constraints. The MMSE linear precoding/decoding design has been studied for the uplink in [6], and for the downlink in =-=[7]-=- [8]. The signal processing involved in the uplink beamforming is simpler than that of the downlink [9] [10]. Thus, uplink-downlink duality is an important tool to simplify downlink system design. 1Th... |

13 | Distributed beamforming and power allocation for cooperative networks,”
- Ding, Chin, et al.
- 2008
(Show Context)
Citation Context ...mmunicate through a relay network are considered, and the relay weight optimization is formulated in terms of semidefinite programming (SDP) and solved through a semidefinite relaxation technique. In =-=[16]-=-, a distributed beamforming scheme with two relays is proposed which has the advantage of limited feedback and improved diversity. In [17], with limited feedback and assuming perfect CSI, beamforming ... |

4 | Optimal distributed beamforming in relay networks with common interference,” in
- Gomadam, Jafar
- 2007
(Show Context)
Citation Context ...s to form a beam towards the receiver [11], known as distributed beamforming. In distributed beamforming, amplitudes and phases of transmitted signals are coherently combined at the receiver [12]. In =-=[13]-=-, rate maximization for a parallel relay network with noise correlation is studied. In [14], a distributed beamforming system with a single transmitter and receiver and multiple relay nodes is studied... |

2 | Optimization of power constrained multisource uplink relay networks
- Zheng, Blostein
- 2009
(Show Context)
Citation Context ...rate so as to form a beam towards the receiver [11], known as distributed beamforming. In distributed beamforming, amplitudes and phases of transmitted signals are coherently combined at the receiver =-=[12]-=-. In [13], rate maximization for a parallel relay network with noise correlation is studied. In [14], a distributed beamforming system with a single transmitter and receiver and multiple relay nodes i... |