Sökning: "limited feedback"
Visar resultat 1 - 5 av 176 avhandlingar innehållade orden limited feedback.
1. Limited Feedback Information in Wireless Communications : Transmission Schemes and Performance Bounds
Sammanfattning : This thesis studies some fundamental aspects of wireless systems with partial channel state information at the transmitter (CSIT), with a special emphasis on the high signal-to-noise ratio (SNR) regime. The first contribution is a study on multi-layer variable-rate communication systems with quantized feedback, where the expected rate is chosen as the performance measure. LÄS MER
2. Multiantenna Cellular Communications : Channel Estimation, Feedback, and Resource Allocation
Sammanfattning : The use of multiple antennas at base stations and user devices is a key component in the design of cellular communication systems that can meet the capacity demands of tomorrow. The downlink transmission from base stations to users is particularly limiting, both from a theoretical and a practical perspective, since user devices should be simple and power-efficient, and because many applications primarily create downlink traffic (e. LÄS MER
3. Data Transmission in the Presence of Limited Channel State Information Feedback
Sammanfattning : .... LÄS MER
4. Cross-layer Aspects in OFMDA Systems : Feedback, Scheduling and Beamforming
Sammanfattning : This thesis mainly studies the downlink of a wireless multiuser system, where the transmitter has limited knowledge about the communication channels of the users. Key techniques to improve the performance of such systems are, for instance, multiple antennas, multiuser diversity and orthogonal frequency-division multiple access (OFDMA). LÄS MER
5. Haptic Feedback Control Methods for Steering Systems
Sammanfattning : Haptic feedback from the steering wheel is an important cue that defines the steering feel in the driver-vehicle interaction. The steering feedback response in an electric power assisted steering is primarily dependent on its control strategy. LÄS MER