Proceedings ArticleDOI
Channel-Dependent Scheduling of Uplink Single Carrier FDMA Systems
Junsung Lim,Hyung G. Myung,Kyungjin Oh,David J. Goodman +3 more
- pp 1-5
TLDR
This work investigates channel-dependent scheduling schemes to achieve multi-user diversity and frequency selective diversity and shows that rate-sum capacity can increase up to 130% for L-FDMA and 40% for I- FDMA relative to static round robin scheduling.Abstract:
We examine single carrier frequency division multiple access (SC-FDMA) with frequency domain equalization for uplink data transmission. We investigate channel-dependent scheduling schemes to achieve multi-user diversity and frequency selective diversity. There are two subcarrier mapping schemes in SC-FDMA: Localized FDMA (L-FDMA) and Interleaved FDMA (I- FDMA). L-FDMA benefits from frequency selective scheduling, but it incurs higher peak-to-average power ratio than I-FDMA. Throughout our work, we provide low complexity channel- dependent scheduling (CDS) methods for L-FDMA and I-FDMA. The results show that rate-sum capacity can increase up to 130% for L-FDMA and 40% for I-FDMA relative to static round robin scheduling.read more
Citations
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Patent
Uplink control information transmission methods for carrier aggregation
Bala Erdem,Philip J. Pietraski,Sung-Hyuk Shin,Zhang Guodong,Tsai Allan Y,Levy Joseph S,Adjakple Pascal M,John W. Haim,Olesen Robert L,Kyle Jung-Lin Pan +9 more
TL;DR: In this article, a method and apparatus for transmitting uplink control information (UCI) for Long Term Evolution-Advanced (LTE-A) using carrier aggregation is disclosed.
Patent
Control channel signaling and acquisition for carrier aggregation
Bala Erdem,Zhang Guodong,Philip J. Pietraski,Sung-Hyuk Shin,Peter S. Wang,Marian Rudolf,Levy Joseph S,Grieco Donald M,Shankar Somasundaram,Kyle Jung-Lin Pan +9 more
TL;DR: In this article, a method and apparatus for handling a control channel for carrier aggregation in wireless communications is presented, which includes determining which component carrier to listen to, detecting the downlink control channel, processing mapping information related to downlink and uplink transmissions and operating discontinuous reception with respect to carrier aggregation.
Proceedings ArticleDOI
Channel-aware scheduling algorithms for SC-FDMA in LTE uplink
TL;DR: Three new channel-aware scheduling algorithms for SC-FDMA are proposed and evaluated in both local and wide area scenarios and outperform the round-robin scheduling in terms of cell spectral efficiency with gains up to 68.8% in wide area environments.
Patent
Signaling uplink control information in lte-a
TL;DR: In this paper, a user device can determine whether uplink control information and/or available channels meet certain criteria and determine whether the uplink information should be transmitted on a physical uplink controller channel, a shared channel, or both, based on the criteria.
Journal ArticleDOI
A Survey on Uplink Resource Allocation in OFDMA Wireless Networks
Elias Yaacoub,Zaher Dawy +1 more
TL;DR: A survey of resource allocation and scheduling schemes in OFDMA wireless networks is presented and the focus is on the uplink direction.
References
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Multiuser OFDM with adaptive subcarrier, bit, and power allocation
TL;DR: The results show that the proposed algorithm outperforms multiuser OFDM systems with static time-division multiple access (TDMA) or frequency-divisionmultiple access (FDMA) techniques which employ fixed and predetermined time-slot or subcarrier allocation schemes.
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Ji-Ho Jang,Kwang Bok Lee +1 more
TL;DR: A transmit power adaptation method that maximizes the total data rate of multiuser orthogonal frequency division multiplexing (OFDM) systems in a downlink transmission and proposes a simple method where users with the best channel gain for each subcarrier are selected and then the transmit power is equally distributed among the subcarriers.
Proceedings ArticleDOI
Increase in capacity of multiuser OFDM system using dynamic subchannel allocation
Wonjong Rhee,John M. Cioffi +1 more
TL;DR: A multiuser convex optimization problem is derived to find the optimal allocation of subchannels, and a low-complexity adaptive subchannel allocation algorithm is proposed that performs almost as well as the optimal solution.
Journal ArticleDOI
Joint subcarrier and power allocation in uplink OFDMA systems
TL;DR: Simulation results show that the proposed scheme enhances the system capacity, providing almost near optimal solutions with low computational burden.
Proceedings ArticleDOI
Peak-To-Average Power Ratio of Single Carrier FDMA Signals with Pulse Shaping
TL;DR: This paper analytically derive the time domain SC-FDMA signals and numerically compare PAPR characteristics using the complementary cumulative distribution function (CCDF) of P APR, and finds that localized FDMA (LFDMA) has higher PAPr than interleavedFDMA (IFDMA) but somewhat lowerPAPR than OFDMA.