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This paper provides an enlightment into the pairwise error probability (PEP) of multi-antenna (MIMO) space-time code (STC) based selective decode then forward cooperative scheme considering Nakagami-m channel. We examine the pairwise error probability at the destination node, and we have formulated the closed form expression for pairwise error probability. We have achieved full diversity order in...
With the deployment of small cell networks, low-cost backhaul schemes for small cell base stations (SBSs) have attracted great attentions. Self-backhaul using cellular communication technology is considered as a promising solution. Although some excellent works have been done on self-backhaul in small cell networks, most existing works do not consider the recent advances of full-duplex (FD) and massive...
In this paper, we consider design optimization of low-density parity-check (LDPC) coded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems for high data rate wireless transmission. First, starting from the maximum-likelihood (ML) principle, we devise a novel expectation-maximization (EM)-based scheme for joint estimation of carrier frequency-offset (CFO)...
A channel estimation scheme for a multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) system was presented. The scheme makes use of the pilots to estimate the channel impulse response based on least square criteria. To improve the estimation performance, a neural network approach was applied to track the varying of the channel, which using a variable step-size RLS. The...
In this paper, we extend the non-vanishing determinant (NVD) criterion to the selective fading channel case. A new family of split NVD parallel codes, that satisfies this design criterion, is proposed to achieve the optimal diversity multiplexing tradeoff (DMT) derived by Coronel and Bölcskei, IEEE ISIT, 2007. This result is of significant interest not only in its own right, but also because it settles...
Generalized selective combining (GSC) is a hybrid diversity technique involving first selective combining (SC) followed by maximal ratio combining (MRC). In this paper we study a new technology based on bit log-likelihood ratio (BLLR) which is better than the traditional GSC based on signal-to-noise ratio (SNR) in performance. WCDMA is one of the key technologies of the third-generation mobile communication...
This paper proposes a low-complexity turbo block decision feedback equalizer (BDFE) with reliability-based successive soft interference cancellation (SSIC) for multiple-input multiple-output (MIMO) systems. Turbo equalization in MIMO systems needs to combat both intersymbol interference (ISI) due to frequency-selective fading and multiplexing interference (MI) among data streams transmitted by different...
MIMO (multiple input multiple output) and OFDM (orthogonal frequency division multiplexing) bringing along a number of pros; a combination of both stands a good possibility of being the next-generation (4th generation) of mobile wireless systems. The technology however imposes a challenge that is the increased complexity of channel equalization. Wireless channels are multipath fading channels, causing...
This paper addresses the performance analysis for orthogonal space-time block coded (STBC) multiband orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) systems. As the channel model considers the log-normal fading, the resultant signal to noise ratio (SNR) will be the product of a log-normal distributed variable and a variable of sum of several Gamma- distributed variants. Based...
This paper proposes a three-dimensional (3-D) scattering model for multiple-input multiple-output (MIMO) land mobile stratospheric multipath-fading channels. Analytical and closed-form expressions for the spatial and temporal correlation functions between two arbitrary sub-channels are derived, assuming non-isotropic or isotropic scattering environments. This model can be used to estimate the required...
In this paper, the theoretical limits on the asymptotic performance of joint source-channel coding over MIMO fading channels are investigated. Similar to the concept of diversity-multiplexing tradeoff (DMT) in digital MIMO systems, a new measure for the asymptotic high-SNR performance of MIMO source-channel codes is introduced, which is called diversity-fidelity tradeoff, and the optimal tradeoff...
A three dimensional (3-D) cylinder scattering model is proposed for multiple-input multiple-output (MIMO) Land Mobile Stratospheric multipath fading channels. Analytical expressions for the space-time correlation function between two arbitrary sub-channels are derived in non-isotropic environments. This model can be used to estimate the required high altitude platform (HAP) antenna separation to achieve...
In this paper, we investigate the exact error performance of transmit antenna selection combined with receive maximal-ratio combining (MRC) in correlated fast-fading channels. A single transmit antenna that maximizes the instantaneous received signal-to-noise ratio (SNR) is selected among all available transmit antennas. The exact bit error rate (BER) is derived in a concise closed-form for binary...
In this paper, we first analyze the amount of fading (AF) of orthogonal space-time block codes (STBCs) over spatially uncorrelated keyhole channels. In order to investigate the diversity order of keyhole channels, we then derive an approximate expression for the average bit error rate (BER) at high signal-to-noise ratio (SNR). Finally we present the average capacity expression by applying the Gauss-Laguerre...
The asymptotic capacity for the non-coherent MIMO stationary channels having nt transmit and nr receive antennas with flat fading is the focus of this paper. Fading processes of concern are bandlimited. These non-coherent MIMO channels were studied by Etkin and Tse and lower bound of capacity was shown to grow with min(nt, nr)[1 - min(nt, nr)mu] log(SNR) where mu is the normalized Doppler bandwidth...
In practical wireless multiple-input multiple-output (MIMO) communications system, the channel estimation must be imperfect. Unfortunately, the channel estimation errors have not been taken into account by existing soft-output MIMO minimum mean square error (MMSE) vertical Bell lab space time (V- BLAST) detectors when calculating the log-likelihood ratio of each coded bit, i.e., the soft information...
Multiple input multiple output (MIMO) systems are considered as potential candidates for future high data rates wireless networks. However these systems present a practical problem which is the cost of hardware related to every additional antenna. In this paper, we present an effective suboptimal antenna algorithm based on frame error rate for MIMO systems. It only needs a sorted QR decomposition...
Multiple input-multiple output (MIMO) systems hold the potential to drastically improve the spectral effciency and link reliability in future wireless communications systems. A particularly promising candidate for next-generation fixed and mobile wireless systems is the combination of MIMO with Orthogonal Frequency Division Multiplexing (OFDM). OFDM has become the standard method because of its advantages...
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