In this paper, IIR polyphase filters present several interesting properties: they require a very small number of multipliers to implement, they are inherently stable and have low round off noise sensitivity and no limit cycles. Furthermore, it is possible to achieve almost linear phase designs. Pulse shaping filters have been designed and implemented by using Raised cosine filter, Nyquist filte...

Using this assumption, the Bit Error Rate BER for BPSK, QPSK, 4PAM. The same case is between 64QAM and 16 QAM6db difference. Http:www.nxp.comacrobatdownloadapplicationnotesAN970471.pdfSince this scheme depends on the difference between successive phases, it is. In this latter case, the BER of QPSK is exactly the same as the BER of BPSK.Conditional pdf. Encode the information in phase difference...

Partial response continuous phase modulation (CPM) gives constant envelope digital modulation schemes with excellent. power spectra. Both narrow main lobe and low spectral tails can be achieved. When these ,signals are detected in an optimum coherent maximum likelihood sequence detectoy (Viterbi detector), power efficient schemes can also be designed, sometimes at the expense of receiver comple...

Brightness of uniform fields during normal and stabilized viewing was determined as a function of adapting luminance, field size, and luminance gradient of the edges of the adapting field. In one set of experiments, it was found that, over a range of adapting luminances from 6 to 9600 td, a uniformly-illuminated 7.5 deg hemifield appeared about 1 log unit brighter in normal viewing than when it...

In this work performance of Gaussian Minimum Shift Keying (GMSK) modulation is compared with that of conventional QPSK and M-QAM modulation schemes. Use of unfiltered data stream for modulation results in a considerably large bandwidth in the modulated RF signal. Pulse shaping as a signal processing technique has gain grounds as a means to mitigate this problem. Gaussian filter along with squar...

The increasing availability of implicit feedback datasets has raised the interest in developing effective collaborative filtering techniques able to deal asymmetrically with unambiguous positive feedback and ambiguous negative feedback. In this paper, we propose a principled kernel-based collaborative filtering method for top-N item recommendation with implicit feedback. We present an efficient...

Limits on synaptic efficiency are characteristic of biological neural networks. In this paper, weight limitation constraints are applied to the spike time error-backpropagation (SpikeProp) algorithm for temporally encoded networks of spiking neurons. A novel solution to the problem raised by non-firing neurons is presented which makes the learning algorithm converge reliably and efficiently. In...

In the future, there will be a growing need for more flexible but efficient utilization of radio resources. Increased flexibility in radio transmission, however, yields a higher likelihood of interference owing to limited coordination among users. In this paper, we address the problem of flexible spectrum sharing where a wideband single carrier modulated signal is spectrally overlapped by unkno...

A reconfigurable bandpass continuous-time RF ADC tunable over the 0.8–2 GHz frequency range is presented. Systemand circuit-level innovations provide low power consumption and reduced circuit complexity. The proposed architecture operates in both the firstand second-Nyquist zones to enable a wide tuning range from a fixed sampling frequency of 3.2 GHz. A fully-integrated on-chip quadrature phas...

Pulse shaping of a signal at base-band forms a more important tool in controlling and analyzing the parameters like ISI, the modulated signal envelope uniformity, the phase continuity as these parameters lead to the efficient spectral confinement of a binary signal which is a future and nowadays a major important aspect in the design of a wireless cellular communication system. In this paper, d...