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- Wassim Tabikh, Dirk T. M. Slock, Yi Yuan-Wu
- 2015 IEEE 16th International Workshop on Signal…
- 2015

Interference alignment (IA) through beamforming in MIMO Interfering Broadcast Channels (IBC) allows to handle multi-cell interference with low latency. However, with multiple antennas on both ends, the MIMO setting requires global Channel State Information at the Transmitter (CSIT) (i.e. CSIT from the other transmitters (Tx) also). Though global CSIT can be… (More)

- Wassim Tabikh, Dirk T. M. Slock, Yi Yuan-Wu
- ISWCS
- 2016

- Wassim Tabikh, Yi Yuan-Wu, Dirk T. M. Slock
- ICC
- 2017

The Interfering Broadcast Channel (IBC) applies to the downlink of (cellular and/or heterogeneous) multi-cell networks, which are limited by multi-user (MU) interference. The interference alignment (IA) concept has shown that interference does not need to be inevitable. In particular spatial IA in the MIMO IBC allows for low latency transmission. However,… (More)

- Wassim Tabikh, Dirk T. M. Slock, Yi Yuan-Wu
- VTC Spring
- 2016

The weighted sum rate (WSR) maximizing linear precoder algorithm is studied in large correlated multiple-input singleoutput (MISO) interference broadcast channels (IBC). We consider an iterative WSR design which exploits the connection with Weighted sum Minimum Mean Squared Error (WMMSE) designs as in [1], [2] and [3], focusing on the version in [1]. We… (More)

- Wassim Tabikh, Dirk T. M. Slock, Yi Yuan-Wu
- 2016 Information Theory and Applications Workshop…
- 2016

We consider a combined form of partial CSIT (Channel State Information at the Transmitter(s) (Tx)), comprising both channel estimates (mean CSIT) and covariance CSIT. In particular multipath induced structured low rank covariances are considered that arise in Massive MIMO and mmWave settings. For the beamforming optimization, we first revisit Weighted Sum… (More)

- Wassim Tabikh, Dirk T. M. Slock, Yi Yuan-Wu
- ICC Workshops
- 2017

This work deals with beamforming for the MaMISO Interfering Broadcast Channel (IBC), i.e. the Massive MultiInput Single-Output (MaMISO) Multi-User Multi-Cell downlink (DL). The novel beamformers are here optimized for the Expected Weighted Sum Rate (EWSR) for the case of Partial Channel State Information at the Transmitters (CSIT). Gaussian partial CSIT can… (More)

- Wassim Tabikh, Yi Yuan-Wu, Dirk T. M. Slock
- 2016 24th European Signal Processing Conference…
- 2016

We propose a decentralized algorithm for weighted sum rate (WSR) maximization via large system analysis. The rate maximization problem is done via weighted sum mean-squared error (WSMSE) minimization. Decentralized processing relies on the exchange via a backhaul link of a low amount of information. The inter-cell interference terms couple the maximization… (More)

The Interfering Broadcast Channel (IBC) applies to the downlink of (cellular and/or heterogeneous) multi-cell networks, which are limited by multi-user (MU) interference. The interference alignment (IA) concept has shown that interference does not need to be inevitable. In particular spatial IA in the MIMO IBC allows for low latency. However, IA requires… (More)

- Wassim Tabikh, Dirk T. M. Slock, Yi Yuan-Wu
- 2017 Information Theory and Applications Workshop…
- 2017

We consider the Multi-Input Single Output (MISO) Interfering Broadcast Channel (IBC), in other words the multi-user (MU) multi-cell half duplex downlink in a cellular or heterogeneous network, aided by a full duplex MIMO relay. The Degrees of Freedom (DoF) are analyzed for joint coordinated beamforming by the base stations and interference neutralization by… (More)

- Wassim Tabikh, Dirk T. M. Slock, Yi Yuan-Wu
- 2017 IEEE International Symposium on Information…
- 2017

This work deals with beamforming for the MIMO Interfering Broadcast Channel (IBC), i.e. the Multi-Input MultiOutput (MIMO) Multi-User Multi-Cell downlink (DL). The novel beamformers are here optimized for the Expected Weighted Sum Rate (EWSR) for the case of Partial Channel State Information at the Transmitters (CSIT). Gaussian (Posterior) partial CSIT can… (More)