In this work we address the speaker verification task in domestic environments, monitored by multiple distributed microphones. In particular, we focus on the problem of mismatch in the propagation channel between the enrolment stage, which occurs at a fixed position, and the test phase which could happen in any location of a multi-room apartment. Building upon the Total Variability framework an...

One of the most effective approaches to enhance the throughput capacity of wireless mesh networks (WMN) is to use systems with multiple channels and multiple radios per node. Multi-channel multi-radio (MCMR) networks require efficient channel assignment (CA) algorithms to determine which channel a link should use for data transmission in order to maximize network throughput. The problem of CA h...

Wireless mesh networks (WMNs) have been considered as one of the key technologies for the configuration of wireless machines since they emerged. In a WMN, wireless routers provide multi-hop wireless connectivity between hosts in the network and also allow them to access the Internet via gateway devices. Wireless routers are typically equipped with multiple radios operating on different channels...

We know that channel routing is very important problem in VLSI physical design. The main objective of a channel routing algorithm is the reduction of the area of a IC chip. In this paper, we just do a survey on some impotent multi-layer routing algorithms. Here we analyze The Efficient Routing algorithm and resolve horizontal constraints and minimize the net wirelength in a particular model of ...

We consider channel allocation to mitigate interference between wireless LANs. The channel allocation task is often formulated in the literature as finding a proper colouring of a single graph. We show that the interference between WLANs can be channel dependent in which case a different conflict graph is associated with each channel. Channel allocation then corresponds to a multi-graph colouri...

In this work, Duty Cycled Sensor Multi Channel (DC-SMC) Medium Access Control (MAC) has been proposed for wireless sensor networks. The DC-SMC MAC uses a dedicated control channel and multiple data channels. The effective solution for the multi channel hidden terminal problem and missing receiver problem has been proposed in this work. The performance of the DC-SMC MAC has been compared with th...

A multiple transmit antenna, single receive antenna (per receiver) downlink channel with limited channel feedback is considered. Given a constraint on the total system-wide channel feedback, the following question is considered: is it preferable to get low-rate feedback from a large number of receivers or to receive high-rate/high-quality feedback from a smaller number of (randomly selected) re...

The focus of this paper is on the multi-channel MAC protocols for underwater acoustic sensor networks. We model and analyze two generalized multi-channel MAC protocols: multi-channel access with Aloha on a dedicated control channel and multi-channel access with RTS/CTS on a dedicated control channel. Though the long delay feature of underwater acoustic channels drastically increases the complex...

A tactical ad hoc network is usually divided into several subnets by Code Division Multiple Access with frequency hopping sequences. In practice, the number of subnets needed in common tactical task is much lower than the theoretical networking capacity, which causes serious code resource waste. To make full use of idle code resources, we present a single-transceiver multi-channel routing proto...

-The multi-channel technique is a powerful scheme to improve the capacity of wireless network. CSMAC/CA based medium access protocols use carrier sense and RTS-CTS handshake to reduce the collisions of the share channel. In this paper, we propose a new MAC protocol for multi-hop ad hoc networks, which combines the CSMA/CA and Multi-channel techniques. And we call it Multiple Access with Collisi...