BER Analysis of Uplink OFDMA in the Presence of Carrier Frequency and Timing Offsets on Rician Fading Channels

Raghunath, K.J.; Itankar, Yogendra Umesh; Chockalingam, A.; Mallik, Ranjan K.

doi:10.1109/tvt.2011.2168250

Cited by 9 publications

(3 citation statements)

References 20 publications

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“…Single-carrier Multi-carrier SISO [404], [405], [406], [407], [408], [409], [410], [411], [412], [413], [414], [415] [416], [417], [418], [419], [420], [421], [422], [423], [424], [425], [426], [427], [414], [428], [429], [430] Multiple Antenna [431], [432] [433], [434], [435] Cooperative AF-OWRN [436],[437] TWRN [438] Multiuser / Multicell SC-FDMA uplink [439] OFDMA uplink [440], [441], [442], [443], [444], [445] CDMA [446] Cognitive Radio [447] [448], [449], [450], [451], [452] Distributed Multiuser [453] Multicell Interference [454]…”

Section: Communication Systemmentioning

confidence: 99%

Timing and carrier synchronization in wireless communication systems: a survey and classification of research in the last 5 years

Nasir

Durrani

Mehrpouyan

et al. 2016

J Wireless Com Network

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Timing and carrier synchronization is a fundamental requirement for any wireless communication system to work properly. Timing synchronization is the process by which a receiver node determines the correct instants of time at which to sample the incoming signal. Carrier synchronization is the process by which a receiver adapts the frequency and phase of its local carrier oscillator with those of the received signal. In this paper, we survey the literature over the last 5 years (2010)(2011)(2012)(2013)(2014) and present a comprehensive literature review and classification of the recent research progress in achieving timing and carrier synchronization in single-input single-output (SISO), multiple-input multiple-output (MIMO), cooperative relaying, and multiuser/multicell interference networks. Considering both single-carrier and multi-carrier communication systems, we survey and categorize the timing and carrier synchronization techniques proposed for the different communication systems focusing on the system model assumptions for synchronization, the synchronization challenges, and the state-of-the-art synchronization solutions and their limitations. Finally, we envision some future research directions.

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Section: Communication Systemmentioning

confidence: 99%

Timing and carrier synchronization in wireless communication systems: a survey and classification of research in the last 5 years

Nasir

Durrani

Mehrpouyan

et al. 2016

J Wireless Com Network

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“…2. The timing offset of different users caused due to the path delay differences among different users and the imperfect timing synchronization will result in interfering packets arrival with different delays [17]. It will result in various levels of partial overlapping of the interfering frames during the sensing window at the femtocell [9], [18].…”

Section: Interference Analysis and Modellingmentioning

confidence: 99%

Interference analysis of subband allocation for femtocells in fractional frequency reuse based OFDMA Networks

Darshi

Bhattacharjee

2014

2014 International Conference on Signal Processing and Communications (SPCOM)

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In Fractional frequency reuse (FFR) based cellular networks which employ femtocells to fulfill the higher data rate requirements, the throughput performance of femtocells are primarily limited by the co-channel interference due to the frequency reuse. However, in orthogonal frequency division multiple access (OFDMA) systems, allocation of an optimum frequency subband based on the minimum interference present in all the available subbands, can improve the performance of femtocells considerably. This paper presents an energy based analysis related to the subband allocation considering the asynchronization effects of interfering signals occurring due to the propagation delays and timing offsets in the network. Based on the analysis presented here, a femtocell can be configured to provide improved performance by selecting a subband least affected by the interference.

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“…In contrast with downlink system, TOs in arrival times among users in uplink come from different distance and transmission timing mismatch. Some studies are proposed to resolve the TO problem [14][15]. However, these studies considered only one aspect of PAPR and TO among users.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Multi-user Timing Offset Resilient Uplink OFDMA Schemes with Optimal Power Control

Lee

Choi

2015

2015 12th International Conference on Information Technology - New Generations

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We investigate the channel capacity of two kinds of uplink OFDMA (Orthogonal Frequency Division Multiple Access) schemes, i.e., ZCZ (Zero Correlation Zone) code timespread OFDMA and sparse SC-FDMA (Single Carrier Frequency Division Multiple Access) which are robust to access timing offset (TO) among users. For the practical condition, we consider not only the TO among users but also the PAPR ( peak to average power ratio) which is a major issue of uplink OFDMA. In the case with TOs in arrival times among users, the amplified user's signal by power control affect the distortion of other user's signal. Meanwhile, amplified signal by simply considering distance between user and base station might be distorted due to the limit of amplifier and thus the performance might degrade. In order to achieve the maximum channel capacity, we investigate the combinations of optimized power control so called ASF (Adaptive Scaling Factor) by numerical simulations. We check that the channel capacity with optimized power control by ASF increases compared to the case without ASF i.e., ASF=1. From the simulation, in the case of high signal to noise ratio (SNR), ZCZ code time-spread OFDMA achieves higher channel capacity compared to sparse block SC-FDMA. On the other hand, in the case of low SNR, the sparse block SC-FDMA achieves better performance compared to ZCZ time-spread OFDMA.

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BER Analysis of Uplink OFDMA in the Presence of Carrier Frequency and Timing Offsets on Rician Fading Channels

Cited by 9 publications

References 20 publications

Timing and carrier synchronization in wireless communication systems: a survey and classification of research in the last 5 years

Timing and carrier synchronization in wireless communication systems: a survey and classification of research in the last 5 years

Interference analysis of subband allocation for femtocells in fractional frequency reuse based OFDMA Networks

Comparison of Multi-user Timing Offset Resilient Uplink OFDMA Schemes with Optimal Power Control

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