A new construction method of two-dimensional (2D) variable-weight optical orthogonal codes (VWOOCs) is proposed for high-speed optical code-division multiple-access (OCDMA) networks supporting multiple qualities...
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A new construction method of two-dimensional (2D) variable-weight optical orthogonal codes (VWOOCs) is proposed for high-speed optical code-division multiple-access (OCDMA) networks supporting multiple qualities of services (QoS). The proposed codes have at most one-pulse per wavelength (AM-OPPW) property. An upper bound of the codeword cardinality of the 2D VWOOCs with AM-OPPW property is derived. It is then shown that the constructed codes have ideal correlation properties and optimal cardinality. Moreover, the code length and the bit-error-rate (BER) performance of the proposed codes are compared with those of the codes proposed previously.
Dear editor, The massive random access (RA) schemes in the existing literature are mainly grant-free approaches, which are supported by non-orthogonal multiple access [1–3], compressive sensing (CS) [4, 5], group...
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Dear editor, The massive random access (RA) schemes in the existing literature are mainly grant-free approaches, which are supported by non-orthogonal multiple access [1–3], compressive sensing (CS) [4, 5], group paging [2, 6], and multichannel ALOHA [7]. However, they still face the challenges of high energy consumption and data overhead, especially in future ultra-dense Internet of Things (Io T) networks (> 10~6devices/km2) [8].
In order to efectively reduce the “decoding latency” of successive cancellation decoding aided Fano(SC-Fano) decoder employed in polarization-adjusted convolutional(PAC) codes, a fast parallel SCFano decoding algori...
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In order to efectively reduce the “decoding latency” of successive cancellation decoding aided Fano(SC-Fano) decoder employed in polarization-adjusted convolutional(PAC) codes, a fast parallel SCFano decoding algorithm is designed, which leverages multiple individual decoding components. Critical challenges arise from how to appropriately initialize the thresholds of diferent SC-Fano decoding components and how will these decoding components cooperate with each other. After appropriately overcoming these challenges, our design is capable of halving the “decoding latency” without incurring any noticeable frame error rate(FER) performance degradation, meanwhile, the overall computational complexity is normally constrained below one and a half times of that required by conventional SC-Fano decoders in simulated typical configurations.
This paper proposes a downlink multi-user transmission scheme for the amplify-and-forward (AF)-based multi-relay cellular network, in which Tomlinson-Harashima precoding (TH precoding) and interference alignment (IA) ...
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Specific emitter identification (SEI) refers to the technology of identifying specific emitter individuals by the RF fingerprint carried by the emitter transmitting signals. RF fingerprint is a hardware difference fea...
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The foundation of compressed sensing (CS) is the sparse representation of signals. Over-complete dictionaries could be utilized to map signals into their sparse representation over the dictionary. and iterative subspa...
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The second generation Audio-video coding Standard(AVS2) is the latest video standard currently under the development of Audio-video coding Standard(AVS) Workgroup of China for achieving higher coding
ISBN:
(纸本)9781467389808
The second generation Audio-video coding Standard(AVS2) is the latest video standard currently under the development of Audio-video coding Standard(AVS) Workgroup of China for achieving higher coding
Reliability and security are crucial considerations for future high-speed railway wireless communication networks which bear the train control information. With the decision by International Union of Railways (UIC) th...
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In this paper, an Administrable Shortcut transmission (AST) scheme in two-hop relay networks which enables two Subscriber Stations (SSs) within the same Relay Station (RS) communicate directly via RS's forwarding ...
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ISBN:
(纸本)9781849191388
In this paper, an Administrable Shortcut transmission (AST) scheme in two-hop relay networks which enables two Subscriber Stations (SSs) within the same Relay Station (RS) communicate directly via RS's forwarding has been investigated. The scenario of AST scheme in two-hop relay networks and a path selection algorithm based on the minimum slot number with AST scheme are put forward. The simulation results show that the system performance is improved significantly with the increase of the probability of AST scheme taken into account. Therefore, AST scheme could be a potential technology for improving system performance in next generation wireless networks.
In this paper, performance of a Turbo Code (TC) and Vertical Bell laboratories Layered Space Time (VBLAST) encoded wireless link is evaluated in the presence of Rayleigh fading for Multiple-Input Multiple-Output (MIMO...
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