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Open research questions in Advanced Wireless Communication Techniques

74 unresolved questions extracted from the limitations and future-work sections of 254 Advanced Wireless Communication Techniques papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Future research can focus on extending the results to more general scenarios, such as wide-band mmWave uplink systems. Future research can also focus on designing more efficient algorithms to solve the capacity maximization problem.

    Capacity Maximization for FAS-Assisted Multiple Access Channels · 2024 · DOI

  • The paper identifies a research gap in the optimization of FAS-assisted multiple access channels. The paper aims to fill this gap by proposing alternating optimization algorithms to solve the capacity maximization problem.

    Capacity Maximization for FAS-Assisted Multiple Access Channels · 2024 · DOI

  • Future research can focus on extending the results to other types of fading channels. Future research can also focus on evaluating the performance of the system in different scenarios, such as with multiple relays or with different modulation schemes.

    An Investigation of the MIMO Space Time Block Code Based Selective Decode and Forward Relaying Network over n-u Fading Channel Conditions · 2022 · DOI

  • The paper identifies a gap in the existing literature on the performance of MIMO-STBC-based S-DF relaying networks over η-µ fading channel conditions. The paper aims to fill this gap by deriving novel closed-form expressions and developing an asymptotically optimal power distribution system.

    An Investigation of the MIMO Space Time Block Code Based Selective Decode and Forward Relaying Network over n-u Fading Channel Conditions · 2022 · DOI

  • Future research can focus on evaluating the computational complexity of the proposed scheme. Future research can also focus on comparing the proposed scheme to other existing schemes in terms of spectrum efficiency and latency.

    An Approximate Evaluation of BER Performance for Downlink GSVD-NOMA with Joint Maximum-likelihood Detector · 2022 · DOI

  • The paper identifies a research gap in the evaluation of BER performance for downlink MIMO-NOMA systems with GSVD precoding. The paper aims to fill this gap by proposing a new precoding scheme and evaluating its performance.

    An Approximate Evaluation of BER Performance for Downlink GSVD-NOMA with Joint Maximum-likelihood Detector · 2022 · DOI

  • Future research should concentrate on improving MD constellations by including sophisticated models or machine learning techniques. The paper suggests that future research can focus on developing new interleaving methods that can further improve the performance of SCMA systems.

    Design Low Complexity SCMA Codebook Using Arnold’s Cat Map · 2022 · DOI

  • The paper identifies the need for efficient SCMA codebook design methods that can reduce computational complexity and improve performance. The paper also mentions the limitations of existing interleaving approaches and the need for new methods.

    Design Low Complexity SCMA Codebook Using Arnold’s Cat Map · 2022 · DOI

  • To analyze the computational complexity of the proposed schemes. To evaluate the performance of the proposed schemes in different channel conditions. To design more efficient signal detection algorithms for QOSTBC systems.

    Improved Signal Detection Techniques for QOSTBC System in Fast Fading Channel · 2020 · DOI

  • Existing QOSTBC schemes are not sufficient to recover original transmitted signals in time-selective fading channels. Conventional signal detection schemes are not effective in reducing intertransmit-antenna-interferences.

    Improved Signal Detection Techniques for QOSTBC System in Fast Fading Channel · 2020 · DOI

  • The approach is limited to a MIMO-OFDM system model with 2 transmitting antennas, 2 receiving antennas, and N subcarriers. The performance of the proposed structure has been evaluated by means of Monte Carlo simulations, which may not reflect real-world scenarios.

    New OSTBC for Blind Channel Estimation and Tracking in MIMO-OFDM Systems · 2019 · DOI

  • To extend the proposed approach to other types of fading channels. To evaluate the performance of the proposed system in real-world scenarios. To compare the performance of the proposed system with other similar systems proposed in literature.

    New OSTBC for Blind Channel Estimation and Tracking in MIMO-OFDM Systems · 2019 · DOI

  • Further research can be done to improve the performance of the SGPA algorithm. Further research can be done to apply the SGPA algorithm to other types of systems.

    Subcarrier Gain Based Power Allocation in Multicarrier Systems · 2014 · DOI

  • The TETRA Enhanced Data System (TEDS) has a limited performance. The system can be improved using transmit diversity.

    Transmit Diversity in the Downlink for the TETRA-TEDS System · 2014 · DOI

  • OFDM systems are sensitive to frequency offset and phase noise. There is a need for a joint scheme for frequency offset and pilot-based channel estimation.

    Frequency Offset Compensation for OFDM Systems Using a Combined Autocorrelation and Wiener Filtering Scheme · 2010 · DOI

  • The need for developing the data transfer methods and systems utilizing frequency band in a highly effective way. The lack of research on phased array antennas in MIMO systems.

    Phased array antennas in MIMO receiver · 2007 · DOI

  • To further improve the convergence speed and tracking ability of the adaptive detector. To reduce the complexity of the PFGLMS receiver. To apply the proposed receiver to other types of MIMO systems.

    An adaptive iterative receiver for space-time coding MIMO systems · 2006 · DOI

  • Co-channel interference from adjacent layers limits the system performance. Prior work has proposed iterative receivers with combined detection and decoding, but with limitations.

    An adaptive iterative receiver for space-time coding MIMO systems · 2006 · DOI

  • Prior work has limited assumptions about fading channels. There is a need for a more realistic expression for pairwise error probability that accounts for antenna spacing, geometry, and scattering models.

    Exact pairwise error probability analysis of space-time codes in spatially correlated fading channels · 2006 · DOI

  • The scenario where the antennas are correlated will be examined in future works. The feedback error rate is typically assumed to be 4% to 10%. The employment of more than 2Tx antennas at the receiver is uneconomical.

    Transmitter diversity antenna selection techniques for wireless channels utilizing differential space-time block codes · 2006 · DOI

  • To examine the scenario where the antennas are correlated. To consider the receiver diversity selection associated with the use of STCs in MIMO systems.

    Transmitter diversity antenna selection techniques for wireless channels utilizing differential space-time block codes · 2006 · DOI

  • The presence of multiple access interference in CDMA channels is a significant problem that needs to be addressed. The need for a detector that can perform well with less precise knowledge of the channel is a research gap.

    CDMA wireless system with blind multiuser detector · 2006 · DOI

  • Limited spectral width in telecommunication, - Need to convey as much information as possible through limited spectral width, - Trade-off between spectral width and BER

    Comparison of traffic performance of QPSK and 16-QAM modulation techniques for OFDM system · 2005 · DOI

  • Further research can be done to compare the performance of other modulation techniques for OFDM. The paper's findings can be extended to other telecommunication systems, such as wireless communication systems.

    Comparison of traffic performance of QPSK and 16-QAM modulation techniques for OFDM system · 2005 · DOI

  • Detailed physical layer simulation of OFDM systems is computationally expensive due to the long coherence time of the indoor mobile channel. There is a need for a model that can efficiently simulate the error distribution of an indoor OFDM physical layer.

    An adaptive hidden Markov model for indoor OFDM based wireless systems · 2004 · DOI

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74 open questions have been extracted from the limitations and future-work passages of 254 Advanced Wireless Communication Techniques papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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