This paper studies interference alignment scheme and minimum mean square error (MMSE) improvement in Internet of Things (IoT)-oriented cognitive systems, where IoT devices share the licensed spectrum by cognitive radio in spectrum underlay. Target to manage the inter-tier interference caused by cognitive spectrum sharing as well as ensure an MMSE at receivers, the interference alignment algorit...

This paper presents a multi-input multi-output (MIMO) multi-layered perceptron neural network with backpropagation algorithm (MLP/BP). The proposal is a waveform equalizer for distorted nonreturn-to-zero (NRZ) data recovery in band-limited channels with co-channel interference (CCI). From the simulation results, we note that the proposed design can recover severe distorted NRZ data as well as s...

This article presents a performance analysis of networks in the presence of co-channel interference with error correcting codes. The performance is evaluated in terms of the bit error rate (BER) for cellular networks using convolutional and turbo codes with BPSK modulation, for AWGN and fading channels. The impact of the co-channel interference is assessed theoretically and also simulated in sc...

A new method of co-channel interference rejection for digital television receivers is presented that uses a di erent rejection lter from the comb lter that was used in the prototype built by Zenith. This lter is optimized for rejection of co-channel NTSC interference in the presence of white noise and hence su ers a penalty of only 0.4 dB in AWGN as compared to 3.5 dB with the comb. The receive...

In this letter, we investigate the outage probability of a dual-hop N -best decode-and-forward multicast relay network in which the relay and destination undergo multiple co-channel interferences (CCIs). It is shown that the signal-to-interferenceplus-noise ratio (SINR) of the link from source to destination and that from relays to destination are correlated due to the common CCI at the destina...

Interference can be a significant problem in loosely organized networks such as ad-hoc radio networks. One technique for dealing with interference is to attempt joint detection of all signals arriving at a node. Iterative algorithms based on the turbo-principle yield significant performance improvements when applied to this problem. This paper concentrates on performance analysis of iterative i...

Multi-radio multi-channel (MRMC) wireless mesh networks (WMNs) achieve higher throughput using multiple simultaneous transmissions and receptions. However, due to limited number of non-overlapping channels, such networks suffer from co-channel interference, which degrades their performance. To mitigate co-channel interference, effective channel assignment algorithms (CAAs) are desired. In this ...

It is well-known that mobile communication systems are usually limited in their performance and capacity by three major impairments, which are multi-path fading, delay spread and co-channel interference (CCI). OFDMA (OFDM-FDMA) system can cope with the multi-path fading and delay spread easily due to the beneficial properties of OFDM technology. Though OFDMA scheme avoids intra-cell interferenc...

Femtocells are regarded as a milestone for next generation cellular networks. As femtocells are deployed in an unplanned manner, there is a chance of assigning same resource to neighboring femtocells. This scenario may induce co-channel interference and may seriously affect the service quality of neighboring femtocells. In addition, the dominant transmit power of a femtocell will induce co-tier...