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This paper considers a multiple-access channel with two state components, where the first sender knows only the first state component, the second sender knows only the second component, and the receiver knows both components. The notion of adaptive-rate capacity is introduced to characterize the set of achievable rates when the state is fixed in each(More)
—The high peak-to-average-power ratio (PAR) of Orthogonal Frequency Division Multiplexing (OFDM) transmission systems significantly reduces the power efficiency or performance of such systems, and many techniques have been proposed to deal with this problem. Recently, the Active Constellation Extension (ACE) algorithm has received much attention, where the(More)
—One of the main problems with Orthogonal Frequency Division Multiplexing (OFDM) modulation is the high peak-to-average-ratio (PAR) of the transmitted time-domain signal. Optimally distorting the transmitted constellation for peak reduction in OFDM systems was recently introduced [1] and shown to be a convex optimization problem. This work advantageously(More)
— The high Peak-to-Average-Power ratio (PAR) of Orthogonal Frequency Division Multiplexing (OFDM) transmission systems has become a significant issue in the design of modern multicarrier systems. One of the earliest and most popular techniques is tone reservation [1], where a set of unused tones (or specially reserved-tones) are exploited to generate(More)
—Multicarrier modulation partitions an inter-symbol interference channel into multiple narrowband channels if the length of the cyclic prefix is longer than the channel impulse response. Otherwise, interference from the current and previous multicarrier symbols causes significant distortion at the receiver. This paper expands on the approach introduced in(More)
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