In DWDM system, the major non-linearities such as SRS and FWM occurs simultaneously in Long-Haul Communication. As the optical signal propagate through the fiber undergoes power fluctuations and crosstalk between the channels in DWDM system. Due to this major problem, the performance of DWDM system get degrades. In this paper, the effect of SRS and FWM affecting the original Dense Wavelength Di...

multicast routing is one of the most important services in multi radio multi channel (mrmc) wireless mesh networks (wmn). multicast routing performance in wmns could be improved by choosing the best routes and the routes that have minimum interference to reach multicast receivers. in this paper we want to address the multicast routing problem for a given channel assignment in wmns. the channels...

many appealing multicast services such as on-demand tv, teleconference, online games and etc. can benefit from high available bandwidth in multi-radio multi-channel wireless mesh networks. when multiple simultaneous transmissions use a similar channel to transmit data packets, network performance degrades to a large extant. designing a good multicast tree to route data packets could enhance the...

This document describes modular software supporting live signal processing and sound file playback within the Max/MSP environment. Dsp.rack integrates signal processing, memory buffer recording, and pre-recorded multi-channel file playback using an interconnected, programmable signal flow matrix, and an eight-channel i/o format.

Abstract The receiver performance of DS-CDMA systems is significantly affected by the accuracy of channel estimate. In WCDMA downlink systems, the channel information can be estimated using a common pilot channel (CPICH). Since this pilot signal is transmitted to all users in the cell with constant power, we consider the improvement of channel estimate by additionally using power-controlled dat...

In this paper, we have analysed the received signal without multipath at Additive White Gaussian Noise (AWGN) with a Signal to Noise Ratio (SNR) per sample, 10 dB, 8 dB, 6 dB and 4 dB respectively. We present the received signal with a multipath channel with noisy, the signal to noise ratio of 6 dB is studied and a multipath channel noiseless. And doing these studies, we considered the impulse ...

An Adaptive tranSmission mechanism exploiting both interference loCality and the relationship between dEsired sigNal and inTerference (ASCENT) is proposed for uplink transmission in heterogeneous networks. The authors adopt both X channel and Z channel models according to which spatial signal processing is designed. In the X channel, the picocell base station (PBS) exploits information the macr...

Motivated by signal processing, we present a new class of channel codes, called signal codes, for continuousalphabet channels. Signal codes are lattice codes whose encoding is done by convolving an integer information sequence with a fixed filter pattern. Decoding is based on the bidirectional sequential stack decoder, which can be implemented efficiently using the heap data structure. Error an...

In amplify-and-forward wireless relay networks, channel state information is required at the destination for signal detection when coherent distributed space-time coding is performed at the relays. We consider in this paper signal detection in the case of imperfect partial channel knowledge at the destination. For the case of maximum a posteriori signal detection, we propose a modified detector...