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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Power and Bit Allocation for Wireless OFDM Channels with Finite-Rate Feedback and Subcarrier Clustering) ผู้เขียน: ดร.วิรุณศักดิ์ สันติเพ็ชร์, ศาสตราจารย์ ,  กฤษฎา มามาตร, เอก ตันศิริสิทธิกุล, Kaemmatat Jiravanstit สื่อสิ่งพิมพ์:pdf AbstractThe study investigated the allocation of transmission power and bits for a point-to-point orthogonal frequency-division multiplexing channel assuming perfect channel information at the receiver, but imperfect channel information at the transmitter. Channel information was quantized at the receiver and was sent back to the transmitter via a finite-rate feedback channel. Based on limited feedback from the receiver, the corresponding transmitter adapted the power level and/or modulation across subcarriers. To reduce the amount of feedback, subcarriers were partitioned into different clusters and an on/off threshold-based power allocation was applied to subcarrier clusters. In addition, two options were proposed to interpolate a channel frequency response from a set of quantized channel gains and apply the optimal water-filling allocation or a greedy bit allocation based on channel interpolation. Proposed schemes with finite feedback rates were shown to perform close to the optimal allocation without a feedback-rate constraint. In the numerical example, channel capacity decreased about 6% from the optimum when one bit of feedback per subcarrier was used. |
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ที่มา:The 2013 ICICTES organizing commiteeหัวเรื่อง:Transmit Power Allocation Schemes For Wireless OFDM Channels with FiniteRate Feedback |
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ที่มา:The 5the PSU-UNS International Conference on Engineering and Technology (ICET-2011)หัวเรื่อง:Evaluation of Multipath Channel in PLC Application to Smart Grid System |
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 Researcherดร. คมสันต์ หงษ์สมบัติ, รองศาสตราจารย์ที่ทำงาน:ภาควิชาวิศวกรรมไฟฟ้า คณะวิศวกรรมศาสตร์ สาขาที่สนใจ:Power System Dynamics, Stability and Controls/Power System Modeling/ Optmization , Smart Grid, Power System Protection, Power System Planning, Renewable Energy Resume |