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This paper proposes a timing-frequency offset estimation algorithm joint with channel estimation in distributed multi-input multi-output (MIMO) systems, in which different timing and frequency offsets are considered for each pair of transmit and receive antennas. Different from most of the existing methods which estimate the timing or frequency offsets separately, the proposed scheme makes a joint...
In multi-user multi-input multi-output (MIMO) systems, multiple timing and frequency offsets may occur in the procedure of synchronization. Conventional MIMO synchronization methods deal with timing and frequency offsets separately. In fact, these methods can not achieve the best performances because the unknown parameters will interfere with each other. In this paper, we propose a joint timing-frequency...
In this paper, we propose a joint user scheduling and precoding scheme in multicell MIMO system. In the proposed scheme, each user feeds back its preferable precoding vector index as well as a scalar to a BS, then the coordinated BSs share all users' feedback and work as a virtual enhanced BS. BSs determine a first user with maximum expected channel gain, and then use its preferable precoding vector...
This paper addresses a novel quasi maximum a posteriori (MAP) estimation algorithm for multiple frequency offsets in distributed multiple inputs and multiple outputs (MIMO) system in the presence of prior information about frequency offsets. In this paper, the prior information is considered and the Cramer-Rao bound (CRB) for the problem at hand is derived. Additionally, taking advantage of prior...
This paper addresses maximum a posteriori (MAP) estimation algorithm for multiple frequency offsets in distributed multiple inputs and multiple outputs (MIMO) system in the presence of prior information about frequency offsets. In this paper, the prior information is considered and the Cramer-Rao bound (CRB) for the problem at hand is derived. Additionally, taking advantage of prior information, the...
In this paper, the capacity of joint transmit and receive antenna selection systems is investigated. Due to the difficulty in math, a general and closed-form capacity expression has not been obtained in previous works. In this paper, in terms of capacity maximization, we derive a closed-form upper bound of capacity for joint transmit and receive antenna selection systems. Our capacity bound is general...
This paper discusses the identification of multivariable linear time-invariant systems, under the condition that colored noise disturbance exists both in the input and output observation data simultanuously. A recursive algorithm is developed by using eigenvector method for identifying multivariable systems, and also the problem of convergence is discussed. The result of simulation on digital computer...
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