We analytically prove that the outage capacity of the multiple input multiple output (MIMO) which is affected by interference, that is non-causally available as well as the channel state information (CSI) for all user...
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We analytically prove that the outage capacity of the multiple input multiple output (MIMO) which is affected by interference, that is non-causally available as well as the channel state information (CSI) for all users at the transmitter, has the free interference outage capacity. Specifically, orthogonalspace-time block coding (O-STBC) with two transmit antennas and arbitrary number of receive antennas is used for transmission and reception. We modify the random variable U which was proposed by Costa (1983) to account for the availability of the CSI at both the transmitter and receiver. Further, we use lattice dirty paper coding (DPC) to show that an interference free channel capacity can be achieved in the MIMO-OSTBC system. First, we derive the equivalent noise seen by the receiver using an equivalent lattice based dirty paper code. Then the optimal value of the power inflation factor is derived. Next, the channel capacity of the equivalent modulo lattice channel is computed. Finally, performance results in the case of various number of receive antennas are presented and showed that significant reduction in frame error probabilities can be obtained over a system that uses no interference cancellation. (C) 2015 Elsevier B.V. All rights reserved.
In this paper, we consider the scenario of transmitting a first-order Gauss-Markov vector signal over a multi-input multi-output (MIMO) Rayleigh nonfrequency selective fading channel. The signal is reconstructed at th...
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In this paper, we consider the scenario of transmitting a first-order Gauss-Markov vector signal over a multi-input multi-output (MIMO) Rayleigh nonfrequency selective fading channel. The signal is reconstructed at the receiver side with the help of a Kalman filter in order to minimize the mean squared error. orthogonalspacetime codes are utilized in order to increase the quality of estimation and mitigate the destructing effects of the fading channel. As a criterion for estimation quality assessment, we use the distortion outage probability. We first obtain upper and lower bounds for the outage probability as a function of system parameters. We then perform high-SNR analysis of the bounds, through which we prove the achievability of the maximum diversity order for a N x K MIMO fading channel. In addition, we obtain upper and lower bounds for the coding gain of the distortion outage probability in the high-SNR regime, and outline the relation between system parameters and the coding gain.
A variable-power(VP)adaptive modulation(AM)scheme with space-time block code(STBC)is developed in MIMO systems,and the corresponding performance is investigated in Nakagami fading *** optimum switching thresholds are ...
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A variable-power(VP)adaptive modulation(AM)scheme with space-time block code(STBC)is developed in MIMO systems,and the corresponding performance is investigated in Nakagami fading *** optimum switching thresholds are derived so that the spectrum efciency(SE)under an average power and a target bit error rate(BER)constraint is *** the switching thresholds,average BER and SE are further *** a result,closed-form expressions are ***,the exact and approximate BER expressions of VP AM and constant-power(CP)AM systems with delayed feedback are respectively *** results show that the theoretical SE and BER can match the corresponding simulation *** results indicate that VP-AM with STBC provide higher spectrum efciency than the CP counterparts,and has slighter bite error rate performance degradation when the normalized delay is less than 0.01.
In this paper, an orthogonalspace-time coded partial response continuous phase modulation (OST-PCPM) system with two transmit antennas is proposed. It can achieve full diversity with arbitrary inner memory length and...
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In this paper, an orthogonalspace-time coded partial response continuous phase modulation (OST-PCPM) system with two transmit antennas is proposed. It can achieve full diversity with arbitrary inner memory length and phase smoothing functions of CPM schemes. Based on the orthogonality between signals from two transmit antennas and the proposed differential encoding scheme, a fast decoding algorithm is developed for some special cases. Simulation results show that this scheme can provide much better performance with a reasonable complexity, as compared to one transmit antenna CPM scheme. We also give a suboptimal decoding method that provides a tradeoff between complexity and performance.
We consider a new open-loop space-frequency-timecoding schemes by fully sweeping the spatial diversity with additional coding. In this spatial sweeping coding (SSC) scheme, part of the channel coding is embedded in a...
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ISBN:
(纸本)9781424483273
We consider a new open-loop space-frequency-timecoding schemes by fully sweeping the spatial diversity with additional coding. In this spatial sweeping coding (SSC) scheme, part of the channel coding is embedded in a completely randomized diversity hopping pattern, which is not synchronized between the transmitters and the receivers. An efficient max-Log-MAP demodulation algorithm of this SSC is derived. For smooth introduction of the proposal into receiver of existing systems, we further design a practical receiver structure with modular separation of the diversity combining front-end, robust efficient max-Log-MAP soft value computation and the channel decoder. Extensive numerical results are provided to investigate various aspects of the new diversity coding scheme.
The features of the received signal in the LDPC-COFDM MIMO system with space-time block coding(STBC) was analyzed in this paper, the signal estimate of the received signal obeys Gaussian distribution and it has nothin...
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ISBN:
(纸本)9781479925650
The features of the received signal in the LDPC-COFDM MIMO system with space-time block coding(STBC) was analyzed in this paper, the signal estimate of the received signal obeys Gaussian distribution and it has nothing to do with the statistical distribution of the specific channel. According to the features of the received signal, a new decoding algorithm of LDPC for COFDM-MIMO system is proposed. The performance of the algorithm is detailed analyzed in the case of different bit rates and compared with other decoding schemes. The simulation results show that the algorithm can greatly reduce the number of iterations, and improve the decoding speed. Furthermore, the algorithm has the good decoding performances and the adaptability of different code rates.
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