Patent
Information feedback method, system, user device, and base station based on space, time and frequency domain
TLDR
In this article, an information feedback method, system, user device, and base station based on the space, time and frequency domain is used for wireless transmission technology field, where the user device measures and estimates the quality of the wireless transmission downlink of MIMO system.Abstract:
An information feedback method, system, user device, and base station based on the space, time and frequency domain are used for wireless transmission technology field. The user device measures and estimates the quality of the wireless transmission downlink of MIMO system, obtains the information of the rank of the wireless transmission downlink, the precoding matrix index number and the channel quality identifier, and using the channel selectivity in the space domain, the frequency domain and the time domain, processes the information of the wireless transmission downlink in the space domain, the frequency domain and the time domain respectively, then using a feedback method, transmits the information of the downlink to the base station by uplink. The base station performs the optimization of the transmitter according to the information fed back from the user device.read more
Citations
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Patent
Channel state feedback for multi-cell mimo
TL;DR: In this paper, a method for multiple-input multiple-output (MIMO) wireless communication systems with a plurality of adjacent cells (cell A, cell B, celt C, cell D) each containing one or more base stations which co-operatively transmit signals to, and receive signals transmitted from, a user equipment (UE).
Patent
Feedback interval control
Hui Xiao,Luciano Sarperi +1 more
TL;DR: In this article, the authors proposed a method for adjusting the timing of a user's channel state information based on the time variation in channel spatial structure, which helps to achieve a suitable balance between the feedback overhead and system performance.
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Low complexity link adaptatation for LTE/LTE-A uplink with a turbo receiver
TL;DR: In this article, a link adaptation for an LTE/LTE-A uplink with a turbo SIC receiver includes the steps of determining a precoding matrix index PMI and rank index RI selection for uplink when precoding of the uplink is enabled, responsive to channel state information of a subcarrier in uplink, determining a decoding order for codewords in the UL, and performing modulation and coding scheme MCS assignment for the UL uplink based on a hard decision successive interference cancellation SIC rule (without intra-CW cancellation) or a partial hard decision
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Base station device, terminal device and wireless communication system
TL;DR: In this paper, the authors proposed a solution to reduce communication bands of uplink communication caused by notifying a base station device of CSI (Channel State Information), where each of the terminal devices calculates flatness based on a propagation path estimation result and notifies the BS device of the flatness.
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Self-adaptive transmission method of large-scale MIMO downlink
TL;DR: In this article, the authors proposed a self-adaptive transmission method of a large-scale MIMO downlink consisting of the following steps: firstly, utilizing a stronger correlation of the large scale spatial channel to transform the spatial channel into a beam domain through a DFT transformation, in the beam domain, utilizing the maximum system and rate as a criterion to select uses communicate simultaneously, and assigning an optimal transmission beam for each user, thereby determining a transport layer number and a pre-coding matrix for each users, and then, by taking inter-user interferences
References
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Patent
Method and apparatus for controlling uplink transmissions of a wireless communication system
TL;DR: In this article, adaptive reuse schemes are provided wherein the available system resources may be dynamically and/or adaptively partitioned and allocated to the cells based on a number of factors such as the observed interference levels, loading conditions, system requirements, and so on.
PatentDOI
Adaptive feedback method for cellular communication
TL;DR: In this paper, an adaptive feedback method for a cellular communication system having plural terminals feeding back channel information to an access point is proposed, where the system selects one of an opportunistic mode and a polling mode as a feedback mode between the access point and the terminals on the basis of system and traffic parameters.
Patent
Multi antenna channel feedback method based on instantaneous and statistic channel information
TL;DR: The multi-antenna channel feedback method based on two modes of transient and statistic channel information feedback improves communication data ratio, reduces feedback information of multiantenna channel, and increases robustness of multiuser system.