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Full search L1-norm (FS-L1) and sphere decoding L∞-norm (SD-L∞) detectors have been previously proposed for multiple-input multiple-output (MIMO) systems as they entail a lower receiver complexity than the optimal L2-norm detector. However, the performance loss caused by application of these suboptimal detectors in additive white Gaussian noise (AWGN) has not been well investigated yet. In this paper,...
Low Density Parity Check (LDPC) codes have been adopted in a number of wired and wireless communication standards due to their improved error correcting ability and relatively simple decoder structure. However, for very high throughput systems operating in the multi-Gb/s range conventional decoding methods based on message passing are limited, due largely to the sheer volume of messages being exchanged...
This paper proposes an idea of developing a model of estimating timing offset error of OFDM (Orthogonal Frequency Division Multiplexing) system without the use of additional pilots relying on inherent characteristics of the OFDM signal. An analytical expression has been derived and formulated to analyze the effect of bit error rate (BER) due to timing offset introduced by the transmission channel...
Power conservation is an issue of primary concern in wireless sensor networks. Since the nodes deployed have limited battery power higher transmit powers would lead to an earlier end of the nodes/network lifetime. The network deployed has to have a good connectivity level to ensure uniformity through out the network and avoid the circumstances leading to a very early lifetime end of some of the nodes...
This paper proposes an analytical performance evaluation of an orthogonal frequency division multiplexing (OFDM) under the combined influence of carrier frequency offset (CFO), phase noise and timing jitter. An exact closed form expression for the signal-to-interference-noise ratio (SINR) is derived and the combined effects of these synchronization impairments are exhibited by expressing the OFDM...
An energy efficient cooperative MIMO selection scheme is proposed for uniform load distribution in cluster based wireless sensor networks. The intrinsic data flow direction in multi hop cluster based sensor networks causes uneven load distribution in the network. The transit clusters and the clusters near the base station carry more network traffic than the other clusters. Cooperative MIMO can artistically...
We present an adaptive rate communication in conjunction with cooperative MIMO for uniform energy load distribution in wireless sensor networks (WSN). The inherent data flow structure of WSN causes uneven load distribution in the network. The transit nodes and the nodes near the base station (BS) carry more network traffic load than the other nodes in the network. We have analyzed the cooperative...
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