We have evaluated the information theoretical performance of variable rate adaptive channel coding for Rayleigh fading channels. The channel states are detected at the receiver and fed back to the transmitter by means of a noiseless feedback link. Based on the channel state informations, the transmitter can adjust the channel coding scheme accordingly. Coherent channel and arbitrary channel sym...

In a multiuser broadcast channel with M antennas at the base station and K ≥ M i.i.d. users, multiuser diversity can be exploited by optimally choosing a set of M users to serve simultaneously with linear beamforming. In order to perform the user selection, the base station requires channel state information (CSI) of all K users which is obtained through limited feedback in frequency division d...

The theory of multiple-input multiple-output (MIMO) technology has been well-developed to increase fading channel capacity over single-input single-output (SISO) systems. This capacity gain can often be leveraged by utilizing channel state information at the transmitter and the receiver. Users make use of this channel state information for transmit signal adaptation. In this correspondence, we ...

One of the fundamental limitations of mobile radio communications is their timevarying fading channel. This thesis addresses the efficient use of channel state information to improve the communication systems, with a particular emphasis on practical issues such as compatibility with the existing wireless systems and low complexity implementation. The closed-loop transmit diversity technique is ...

We study finite alphabet channels with Unit Memory on the previous Channel Outputs called UMCO channels. We identify necessary and sufficient conditions, to test whether the capacity achieving channel input distributions with feedback are time-invariant, and whether feedback capacity is characterized by single letter, expressions, similar to that of memoryless channels. The method is based on s...

In this paper, 1-bit, 2-bit and 3-bit feedback performances of Space Time Trellis Code in Rayleigh channel are studied. The open loop performance shows better result whereas due to complexity of trellis the performance degrades with feedback. But still with increasing the number of bits, the error rate performance improves again. In case of error rates, 3bit feedback system has the lowest value...

Resource Discovery and Management Model is always one of key technologies on Computational Grid research. In order to provide a proper integration of intelligent global adjustment ability and swift discovery ability to resources information dynamic changes, a Feedback and Investigation Based Resources Discovery and Management Model (F&IBRD&MM) with three specific channels, Normal Channel, Feedb...

This paper proposes a low-complexity scheduling algorithm with opportunistic channel state feedback using zero-forcing dirty paper coding (ZF-DPC) or zero-forcing (ZF). Whereas some existing schemes suffer a delay to update the serving users, the proposed algorithm continues to update the serving users immediately at each opportunistic channel feedback. Due to this dynamic serving user adaptati...

Channel adaptive transmission requires knowledge of channel state information at the transmitter. In temporally correlated MIMO channels, the correlation can be utilized to reduce feedback overhead and improve performance. In this paper, Compressed Sensing (CS) methods and rotative quantization are used to compress and feedback channel state information for MIMO systems as an extension work of ...