channel state
RSS channel stateAn Efficient Polling Strategy for Bluetooth Piconets Using Channel State Information
White Paper The paper proposes a new piconet scheduling algorithm based on the estimated channel state information. In general the performance evaluation of most piconet scheduling algorithms recently proposed do not consider the packet losses in the wireless... [03 Jul 2008]
Adaptive OFDM Techniques With One-Bit-Per-Subcarrier Channel-State Feedback
White Paper Adaptive techniques can be applied to mitigate this effect if the Channel-State Information (CSI) is available at the transmitter. Under the conditions of a constant raw data rate and perfect feedback channel, the performance of these approaches... [11 Apr 2007]
A Bluetooth Scheduling Algorithm Using Channel State Information
White Paper This paper proposes a piconet scheduling algorithm based on the estimated channel state information. Bluetooth is a promising wireless technology designed for personal ad hoc networks. This policy is appropriate for wireless and mobile... [03 Jul 2008]
Throughput and Transmission Capacity of Ad Hoc Networks With Channel State Information
Assuming each node knows the Channel State Information (CSI, e.g.the channel gain and/or channel distance) to just its intended receiver, it proposes a simple distributed threshold-based scheduling rule and derive the threshold that optimizes... [10 Aug 2007]
Throughput and Transmission Capacity of Ad Hoc Networks With Channel State Information
White Paper Assuming each node knows the Channel State Information (CSI, e.g.the channel gain and/or channel distance) to just its intended receiver, it proposes a simple distributed threshold-based scheduling rule and derive the threshold that optimizes... [10 Aug 2007]
Adaptive Power Loading for Multiple-Input Multiple-Output OFDM Systems With Perfect Channel State Information
White Paper The adaptive subchannel power allocation is based on perfect channel state information at the transmitter and singular value decomposition. This paper derives a power loading procedure optimizing the bit-error rates of multiple-input multiple... [21 Jul 2005]
Throughput and Transmission Capacity of Ad Hoc Networks With Channel State Information
White Paper Assuming each node knows the Channel State Information (CSI, e.g.the channel gain and/or channel distance) to just its intended receiver, it proposes a simple distributed threshold-based scheduling rule and derive the threshold that optimizes... [31 Aug 2007]
Optimizing Power Efficiency of OFDM Using Quantized Channel State Information
White Paper To this end, the present paper develops loading algorithms to minimize transmit-power under rate and error probability constraints, using three types of Channel State Information at the Transmitter (CSIT): deterministic (per channel realization... [11 Apr 2007]
Fast Transfer of Channel State Information in Wireless Systems
White Paper Nevertheless, this paper shows that the time occupied in frequency-duplex Channel State Information (CSI) transfer is generally less than one might expect, and falls as the number of antennas increases. [12 Dec 2006]
Linear Space-Time Precoding for OFDM Systems Based on Channel State Information
White Paper A new linear space-time precoding scheme for OFDM systems is developed based on channel state information at the transmitter. Drawbacks of OFDM systems such as severe performance degradation for long channel delays exceeding the guard interval and... [03 Jul 2008]
Adaptive MIMO-OFDM Based on Partial Channel State Information
This paper first provides a partial CSI model for orthogonal frequency division multiplexed (OFDM) transmissions over multi-input multi-output (MIMO) frequency-selective fading channels. The paper then develops an adaptive MIMO-OFDM transmitter by... [30 Mar 2005]
Optimal Adaptive Diversity Watermarking with Channel State Estimation
White Paper Digital watermarking emerged as a tool for copyright protection, document authentication, access control and tamper proofing. As the most cited application, watermarking is used for copyright protection where watermark robustness, invisibility and... [05 Apr 2004]
Multichannel Feedback in OFDM Ad Hoc Networks
White Paper This paper proposes a multichannel feedback protocol to enable local scheduling with channel state information for wireless networks with Orthogonal Frequency Division Multiplexing (OFDM). Channel state information of the simultaneous transmissions... [11 Apr 2007]
Adaptive Scheduling for Heterogeneous Traffic Flows in Cellular Wireless OFDM-FDMA Systems
White Paper Dynamic subcarrier scheduling copes with channel state variation by dynamically assigning different subcarriers to terminals, e.g.in the downlink of a cellular system. In addition to the channel state variations, also the arrival of data is highly... [11 Apr 2007]
A Channel Predictor for Wireless Packet Networks
White Paper A channel predictor determines whether to transmit a packet or not depending on the state of the wireless channel. Channel state information provided by the predictor can be used as the foundation to perform compensation for flows experiencing bad... [24 Feb 2004]
