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It is a open research problem of great interest how to fully utilize the benefits of massive MIMO original designed for Time Division Duplex (TDD) also in Frequency-Division Duplexing (FDD). For efficient multi-user downlink transmission Channel State Information (CSI) has to be obtained at the receiver side and fed back to the transmitter. Due to signaling/pilot overhead scaling with the number of...
Uplink power control is a key radio resource management function. It is typically used to maximize the power of the desired received signals while limiting the generated interference. This paper presents the 3GPP long Term Evolution (LTE) power control mechanism, and compares its performance to two reference mechanisms. TD-LTE communications systems are interference limitation systems, The use of...
For the complex environment of coal mine, there are many noises and random errors, which make larger location error in coal mine, lead to the difficulty of finding the precise positions of staff. This paper presented an improved location algorithm based on time average, which was the characteristics of lower computational complexity, less communication cost and stronger anti-interference ability....
A new restoration algorithm aimed at local motion-blur in a complex background is proposed in this paper. First, the local blur part of the image is extracted from the complex background and it is pasted on a bottom of monochromatic background. Then image restoration is done on the blur part in the monochromatic background which is easy to be restored. Finally, the restored local image is pasted back...
The principle of Phase-Inversion Symmetric method (PISM ) in time-domain based on noise correlation is presented, and its anti-narrowband noise interference ability is analyzed. The simulation models of PISM in time-domain and narrowband noise interference are designed. The band-limited Gaussian white noise and narrowband noise interference model is applied to PISM in time-domain to study anti-interference...
Probability of packet success of ad hoc networks is determined by two factors, one is the probability of successful transmission at the receiver, and the other is the probability of successful detection at the detector. In this paper, we study the probability of successful transmission by using the Poisson model with SIR based power control. Taking direct sequence scheme with binary phase shift keying...
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