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Coordinated transmission is an effective way to deal with the inter-cell interference (ICI) problem in a multi-cell distributed antenna system (DAS). However, in a practical scenario, the inter-cell channel state information (CSI) is usually imperfect, consequently causing a significant performance degradation of coordinated transmission. In this paper, to tackle this difficulty, we propose a coordinated...
In this paper we consider the problem of pilot contamination reduction in time division duplexing (TDD) cellular networks with large antenna arrays at each base station. Shifting pilot locations in time is an effective way to obtain better channel estimation and therefore reduce inter-cell interference. We study the method further, and propose a low-complexity time-shifted pilot allocation algorithm...
Quality of service (QoS) guarantees play a significant role in next-generation wireless networks and the concept of effective capacity is proposed to characterize the maximum arrival rate that a time-varying fading channel can support under a delay-QoS constraint. However, the probability density function (PDF)-based analysis of effective capacity over generalized fading channels suffers from mathematical...
This paper investigates linear precoding scheme that maximizes mutual information for multiple-input multiple-output (MIMO) channels with finite-alphabet inputs. In contrast with recent studies, optimizing mutual information directly with extensive computational burden, this work proposes a low-complexity and high-performance design. It derives a lower bound that demands low computational effort and...
In this paper, a 4-transmit-antenna space time block coding (STBC) scheme with 1-bit differential feedback is proposed. This scheme gives full transmit diversity and spatial coding rate over time-selective fading channels by rotating the signal constellations for certain angles determined by the differential feedback information. By utilizing differential feedback, our method can provide much better...
Low Rate Orthogonal Convolutional Codes (LROCC) have been confirmed an outstanding performance in AWGN channel with multiple users, such as the en-route situation in the aeronautical communications with several aircrafts. However, the orthogonal sequences in LROCC still suffer from multipath interference in fading channel, which degrades the performance in practical scenarios. In this paper, extended...
Amplitude phase-shift keying (APSK), especially 16APSK and 32APSK modulations, have been efficiently applied into satellite broadcasting and communications, such as DVB-S2, which endows the system with high spectrum efficiency and transmission rate. However, fewer design about the trellis coding and modulation based on APSK has been reported so far. In this paper, the symmetric and asymmetric TCM...
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