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- W2149291566 abstract "In this paper, a downlink scenario in which a single-antenna base station communicates with K single antenna users, over a time-correlated fading channel, is considered. It is assumed that channel state information is perfectly known at each receiver, while the statistical characteristics of the fading process and the fading gain at the beginning of each frame are known to the transmitter. By evaluating the random coding error exponent of the time-correlated fading channel, we show that there is an optimal codeword length which maximizes the throughput. We examine the throughput of conventional scheduling that transmits to the user with the maximum signal to noise ratio using both fixed length codewords and variable length codewords. Although optimizing the codeword length improves the performance, it is shown that using the conventional scheduling, a gap of Omega(radiclog log log K) exists between the achievable throughput and the maximum possible throughput of the system. We propose a simple scheduling that considers both the signal to noise ratio and the channel time variation. In this case, among users which their fading gain is above a threshold, user that has minimum channel time variation is selected. We show that by using this scheduling, the gap between the achievable throughput and maximum throughput of the system approaches o(1)." @default.
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- W2149291566 date "2006-03-01" @default.
- W2149291566 modified "2023-10-16" @default.
- W2149291566 title "Scheduling and Codeword Length Optimization in Time Varying Wireless Networks" @default.
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- W2149291566 doi "https://doi.org/10.1109/ciss.2006.286460" @default.
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