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Results 1 - 10
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95
MIMO Broadcast Channels with Gaussian CSIT and Application to Location based CSIT
"... (CSIT), which is crucial in multi-user systems, is always imperfect in practice. In this paper we focus on the optimization of beamformers for the expected weighted sum rate (EWSR) in the MIMO Broadcast Channel (BC) (multi-user MIMO downlink). We first review some beamformer (BF) designs for the per ..."
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for the perfect CSIT case, such as Weighted Sum MSE (WSMSE) and we introduce the Weighted Sum SINR (WSSINR) point of view, an optimal form of the Signal to Leakage plus Noise Ratio (SLNR) or Signal to Jamming plus Noise Ratio (SJNR) approaches. The discussion then turns to mean and covariance Gaussian CSIT. We
On the degrees-of-freedom of the 3-user MISO broadcast channel with hybrid CSIT
- In IEEE ISIT
, 2014
"... Abstract—The 3-user multiple-input single-output (MISO) broadcast channel (BC) with hybrid channel state information at the transmitter (CSIT) is considered. In this framework, there is perfect and instantaneous CSIT from a subset of users and delayed CSIT from the remaining users. We present new re ..."
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Cited by 3 (0 self)
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Abstract—The 3-user multiple-input single-output (MISO) broadcast channel (BC) with hybrid channel state information at the transmitter (CSIT) is considered. In this framework, there is perfect and instantaneous CSIT from a subset of users and delayed CSIT from the remaining users. We present new
Imperfect delayed csit can be as useful as perfect delayed csit: Dof analysis and constructions for the bc
"... ar ..."
Degrees-of-Freedom Region of the MISO Broadcast Channel with General Mixed-CSIT
"... Abstract—In the setting of the two-user broadcast channel, recent work by Maddah-Ali and Tse has shown that knowledge of prior channel state information at the transmitter (CSIT) can be useful, even in the absence of any knowledge of current CSIT. Very recent work by Kobayashi et al., Yang et al., a ..."
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Cited by 19 (8 self)
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schemes that achieve this optimal region. Finally this generalization incorporates and generalizes the corresponding result in Maleki et al. which considered the broadcast channel with one user having perfect CSIT and the other only having prior CSIT. I.
1Throughput Scaling of MIMO Channels with Imperfect CSIT in the Low SNR Regime
"... Abstract—We study the effect of channel estimation error on the performance of water-filling in point-to-point MIMO channels at low signal to noise ratios (SNR). In this regard, we derive the water-filling throughput of a MIMO channel in the presence of imperfect channel state information at the tra ..."
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at the transmitter (CSIT). The asymptotic growth rate for the throughput, R, is then found and is compared with the asymptotic growth rate for the capacity with perfect CSIT, CP, as a function of the signal to estimation error ratio (SER). We show that at low SNR, for moderate values of the SER, water-filling based
Interference Alignment with Incomplete CSIT Sharing
, 2014
"... In this work we study the impact of having only incomplete channel state information at the transmitters (CSIT) over the feasibility of interference alignment (IA) in a K-user MIMO interference channel (IC). Incompleteness of CSIT refers to the perfect knowledge at each transmitter (TX) of only a s ..."
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Cited by 10 (4 self)
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In this work we study the impact of having only incomplete channel state information at the transmitters (CSIT) over the feasibility of interference alignment (IA) in a K-user MIMO interference channel (IC). Incompleteness of CSIT refers to the perfect knowledge at each transmitter (TX) of only a
Minimum CSIT to achieve Maximum Degrees of Freedom for the MISO BC∗
, 2014
"... Channel state information at the transmitter (CSIT) is a key ingredient in realizing the multiplexing gain provided by distributed MIMO systems. For a downlink multiple-input single output (MISO) broadcast channel, with M antennas at the transmitters and K single antenna receivers, the maximum multi ..."
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multiplexing gain or the maximum degrees of freedom (DoF) is min(M,K). The optimal DoF of min(M,K) is achievable if the transmitter has access to perfect, instantaneous CSIT from all receivers. In this paper, we pose the question that what is minimum amount of CSIT required per user in order to achieve
1Interference Alignment for the MIMO Interference Channel with Delayed Local CSIT
"... We consider the MIMO (multiple-input multiple-output) Gaussian interference channel with i.i.d. fading across antennas and channel uses and with the delayed local channel state information at the transmitters (CSIT). For the two-user case, achievability results for the degrees of freedom (DoF) regio ..."
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F) region of this channel are provided. We also prove the tightness of our achievable DoF region for some antenna configurations. Interestingly, there are some cases in which the DoF region with delayed local CSIT is identical to the DoF region with perfect CSIT and that is strictly larger than the Do
Bit-Interleaved Coded Multiple Beamforming 1 with Imperfect CSIT
"... This paper addresses the performance of bit-interleaved coded multiple beamforming (BICMB) [1], [2] with imperfect knowledge of beamforming vectors. Most studies for limited-rate channel state information at the transmitter (CSIT) assume that the precoding matrix has an invariance property under an ..."
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with linear detectors. We show that although these receivers have the same performance for perfect CSIT, their performance varies under imperfect CSIT. I.
Results 1 - 10
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95
