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首页> 外文会议> >Frequency Domain Channel-Dependent Scheduling Employing an Adaptive Transmission Bandwidth for Pilot Channel in Uplink Single-Carrier-FDMA Radio Access
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Frequency Domain Channel-Dependent Scheduling Employing an Adaptive Transmission Bandwidth for Pilot Channel in Uplink Single-Carrier-FDMA Radio Access

机译：在上行链路单载波FDMA无线电接入中为导频信道采用自适应传输带宽的频域信道相关调度

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摘要

This paper proposes frequency and time domain channel-dependent scheduling employing an adaptive transmission bandwidth for the pilot channel for channel quality indication (CQI) measurement in the uplink single-carrier (SC)-FDMA radio access. In the proposed scheme, a high multiuser diversity effect due to frequency domain channel-dependent scheduling is gained by assigning a wide pilot transmission bandwidth to user equipments (UEs) near a cell site, whereas the influence of the CQI measurement error is mitigated by assigning a narrow pilot transmission bandwidth to UEs near the cell boundary at the cost of utilizing multiuser diversity in the frequency domain. System simulation results elucidate that the cell throughput using the adaptive pilot transmission bandwidth with the predetermined threshold, THSINR, of −6 dB is increased by approximately 600 kbps compared to that using a fixed 1.25-MHz pilot transmission bandwidth, i.e., only time domain channel-dependent scheduling, owing to an increasing multiuser diversity effect in the frequency domain. We also show that the user throughput using the adaptive pilot channel transmission bandwidth scheme at a 5% cumulative distribution function is increased by approximately 35 and 30 % compared to that using a 5-MHz transmission for 16 and 32 UEs per cell, respectively, for the inter-site distance of 500 m.
机译：本文提出了一种针对频域和时域信道的调度方法，该方法采用针对导频信道的自适应传输带宽，用于上行链路单载波（SC）-FDMA无线接入中的信道质量指示（CQI）测量。在提出的方案中，通过为小区站点附近的用户设备（UE）分配较宽的导频传输带宽，获得了基于频域信道相关调度的高多用户分集效应，而通过分配CQI测量误差的影响得以缓解在小区边界附近向UE的窄导频传输带宽，以在频域中利用多用户分集为代价。系统仿真结果表明，与使用固定1.25 MHz导频传输相比，使用具有-6 dB的预定阈值TH SINR 的自适应导频传输带宽的小区吞吐量提高了约600 kbps。由于频域中越来越多的多用户分集效应，带宽，即仅依赖于时域信道的调度。我们还显示，与在每个小区分别为16个和32个UE使用5 MHz传输的情况下相比，使用自适应导频信道传输带宽方案在5％的累积分布函数下的用户吞吐量分别提高了约35％和30％。站点间距离为500 m。

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