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In this paper, a multi-pair amplify-and-forward (AF) massive MIMO system is investigated, where multiple source users communicate with multiple destination users via a single relay. The achievable rate of the system and its analytical expression are studied for power-scaling laws when ZFT/ZFR algorithm is adopted at the relay. The imperfect channel state information (CSI) is considered and the MMSE...
A multi-pair amplify-and-forward (AF) MIMO system is considered in this paper, in which all source users transmit their information to destination users via a shared relay. With the large N regime, the effect of small-scale fading tends to diminish while the large-scale fading plays a main role in affecting the system performance. The large-scale fading is modeled as generalized-K fading. While the...
In this paper, the multi-pair two-way relaying multi-input multiple-output system is considered, in which K-pair users exchange information within communication pair, by a shared amplify-and-forward relay station equipped with N antennas, N ≫ 2K. Considering two kinds of receiver, i.e., maximum-ratio combining receiver and zero-forcing receiver, we investigate the achievable rate performance in Ricean...
In this paper, we investigate the secrecy outage probability in a dual-hop decode-and-forward (DF) secondary cognitive radio network, which is equipped with one source, one destination, multiple eavesdroppers (EAVs) and multirelay. The direct links from the source to the destination and the EAVs are considered because of the moderate shadowing environment. All channels experience the Rayleigh fading...
In this paper, we study the physical-layer security of amplify-and-forward relaying networks under a spectrum-sharing mechanism over independent non-identically distributed Rayleigh fading channels. Relay selection is presented to select the best relay, which can guarantee the security performance by minimizing the received signal-to-noise ratio at the eavesdropper. In order to guarantee the quality-of-service...
A multi-pair two-way amplify-and-forward relaying system is considered in this paper, where the $K$-pair users exchange information within pairs, with the help of a shared relay station. Each user is equipped with a single antenna while the relay station is equipped with a very large number of antennas $N$, where $N\gg2K$. The impact of imperfect channel state information (CSI) due to the channel...
In this paper, we consider the throughput performance in relay-aided multi-cell orthogonal frequency division multiple access (OFDMA) system, when mobile user (MS) is uniformly distributed and relay station (RS) is located at some typical positions, such as dRS = 0:5 and dRS = 0:85, where dRS is the ratio between the distance from RS to base station (BS) and the cell radius. Although cooperative diversity...
In this paper, we will investigate the block error rate (BLER) performance in cooperative communication, through combining fountain code with network coding. Contrast to the fixed-rate code, the rate of fountain code is not determined in advance, since that varies according to the instant channel state information. Under the error-free channel condition, network coding can get the maximum possible...
Network coding can achieve the maximum possible rate defined by the max-flow min-cut theorem through encoding of the input streams at the correlative nodes under the ideal channel condition. When error happens, encoding will bring in error propagation. By introducing redundancies in space domain, network error correction is proposed, however, with the high encoding and decoding complexity. Specifically,...
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