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This paper presents an amplify-and-forward (AF) relay scheme for M-source-M-destination pairs and N relay nodes. Cooperative minimum mean square error (MMSE) and zero-forcing (ZF) strategies for wireless relay networks under the relay power constraint are investigated. The main contribution of this paper is the derivation of both the MMSE-based and the ZF-based amplifying relay matrices (ARMs) under...
A noncooperative amplify-and-forward (AF) wireless relay network consisting of a one-source-one-destination pair and N relays is investigated. The objective of this paper is to analytically derive the explicit optimal noncooperative relay amplifying matrices (or vector) under both jamming and no-jamming environments, with the relay power constraint based on the minimum mean square error (MMSE) criterion...
This paper presents optimal amplify-and-forward (AF) relay amplifying matrices based on the minimum mean square error (MMSE) criterion for a cooperative AF wireless relay network consisting of a one-source-one-destination node pair and two-level N relay nodes. During data transmission, power is constrained at the source node, at the relay nodes in the first and the second levels, and at the destination...
This paper considers an amplify-and-forward (AF) relay scheme for M-source-M-destination pairs and N relay nodes. Cooperative minimum mean square error (MMSE) strategies for wireless relay networks under both a jamming environment and channel uncertainty with received power constraints at the destination nodes are studied. The main contribution of this paper is the derivation of the MMSE-based amplifying...
This paper studies minimum mean square error (MMSE)-based full-duplex relay processing matrices and source/destination beamforming vectors under perfect channel state information by imposing constraints on the transmit power of source, relay, both, separately, and in various combinations. The main contribution of this paper is the derivation of a set of relay processing and source/destination beamforming...
This paper presents an optimal amplify-and-forward (AF) relay scheme for a multiple-input-multiple-output (MIMO) system consisting of M-mobile sources, M-mobile destinations, and N-cooperative distributed mobile relay nodes. A wireless mobile relaying network with channel state information is in- vestigated. The received signals from the mobile sources are ex- changed between mobile relays to achieve...
Terahertz polarization shaping technique is developed. We have used the combination of wedge-type diffractive optical components in conjunction with a circular InAs pattern to produce various THz waves with temporally-evolving polarization states.
This paper studies the regenerative decode-and-forward (DF) for mobile wireless relay networks under perfect channel state information (PCSI) and imperfect channel state information (ICSI). The wireless mobile network under study consists of one-source-one-destination mobile pair and N-multibranch mobile relay nodes. The proposed detection tactics, employing the maximum ratio combiner (MRC) principle,...
Communication between mobile relays has recently gained much attention. In this paper, a novel optimal diagonal relay amplifying matrix based on the minimum mean square error (MMSE) criterion is proposed for mobile nodes. It is also designed for noncooperative distributed wireless mobile nodes under both no-jamming and jamming environments. An amplify and forward (AF) strategy is considered. The system...
This paper studies channel uncertainty effects on the regenerative decode-and-forward (DF) wireless relay network. A wireless network consisting of a one-source, N-multihop relays, and one-destination without the direct link between the source and the destination is studied. Detection schemes are proposed using the power constraints, and designed for a network experiencing uncertain channels. The...
In the past few years, mobile to mobile communication has gained much attention. Researchers have invested considerable effort in obtaining appropriate channel models to understand the statistical properties of the underlying channels. Generally, models can be classified into two groups, statistical and deterministic. In statistical models, a number of trials are required to obtain the desired properties...
Terahertz pulse generation from circular InAs apertures of sub-wavelength diameter is studied. Temporal advancement occurs for the pulses generated from sub-wavelength excitation InAs apertures. This behavior is explained by the dependency of excitation intensity and size, and can be applied to recognition of sub-wavelength-size patterns.
This paper studies a noncooperative distributed wireless relay system under jamming and no jamming influence. The system under investigation employs amplify-and-forward (AF) tactic at relays, where N-relays forward their received signals from one-source to M-destination nodes. The new proposed optimal amplifying relay diagonal matrices, designed for single-input-multiple-output (SIMO) system, utilizes...
This paper studied a new approach designed for a distributed wireless network under three adverse communication environment, such as, broadband noise jamming (BNJ), node geometry, and channel uncertainty. It is designed for a cooperative network consisting of one-source, one-destination and N-relay nodes that implement amplify-and-forward (AF) strategy. Deriving optimal relay amplifying matrix is...
This paper presents an optimum diagonal amplifying relay matrix based on minimum mean square error (MMSE) criterion for noncooperative distributed wireless relay networks under channel uncertainty. A single-input multiple-output (SIMO) system with one-source M-destination N-relay nodes is considered. Bit error rate (BER) of the wireless relay network under both certain and uncertain channel conditions...
This paper presents the effects of relay-node geometry on bit error rate (BER) performance of an amplifying and forward (AF) relay cooperative distributed wireless network. This paper considers one-source-one-destination pair and N relay nodes. In addition, this paper assumes that all relay nodes share their received signals from the source node and the channel coefficients for cooperation. Then,...
This paper studies channel uncertainty and node geometry influences on a regenerative distributed decode-and-forward (DF) wireless relay network. A network consisting of one-source-one-destination pair and N-multibranch relay nodes without a direct link between the source and the destination is investigated. A new proposed detection scheme employs the maximum ratio combiner (MRC) principle. The new...
This paper derives an optimum relay amplifying matrix for a wireless relay network under channel uncertainty and received power constraints at the destination node. To achieve this objective, an amplify-and-forward strategy is employed at the relay nodes, and the minimum mean square error (MMSE) criteria is applied. And, for simplicity, this paper will assume a one-source-one-destination pair and...
This paper introduces a cooperative distributed wireless relay network under a jamming environment at three different locations. An amplify-and-forward (AF) multiple-input single-output (MISO) system is considered with N-relay nodes. For full relay cooperation, all relay nodes in wireless relay networks exchange their received signals from source nodes with no errors. An optimal non-diagonal amplifying...
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