For high data rate ultra wideband communication system, performance comparison of Rake, MMSE and Rake-MMSE receivers is attempted in this paper. Further a detail study on Rake-MMSE time domain equalizers is carried out taking into account all the important parameters such as the effect of the number of Rake fingers and equalizer taps on the error rate performance. This receiver combats inter-sy...

We experimentally demonstrate the performance analysis of burst-mode receivers (BMRx) in a 622 Mb/s 20-km gigabit-capable passive optical network (GPON) uplink. Our receiver features automatic phase acquisition using a clock phase aligner (CPA), and forward-error correction using (255, 239) Reed-Solomon (RS) codes. The BMRx provides instantaneous (0 preamble bit) phase acquisition and a packet-...

Correlations of the type discussed by EPR in their original 1935 paradox for continuous variables exist for the quadrature phase amplitudes of two spatially separated fields. These correlations were experimentally reported in 1992. We propose to use such EPR beams in quantum cryptography, to transmit predetermined messages in such a way that the receiver and sender may later determine whether e...

This study evaluates the discriminative power of sequential spectrum analysis of the short-term electrocardiogram (ECG) time series in separating normal and subjects with life threatening arrhythmias like, ventricular tachycardia/fibrillation (VT/VF). The raw ECG time series is transformed into a series of binary symbols and the binary occupancy or relative distribution of mono-sequences (i.e. ...

An n-bit string is encoded as a sequence of non-orthogonal quantum states. The parity bit of that n-bit string is described by one of two density matrices, ρ (n) 0 and ρ (n) 1 , both in a Hilbert space of dimension 2 n. In order to derive the parity bit the receiver must distinguish between the two density matrices, e.g., in terms of optimal mutual information. In this paper we find the measure...

Recent experiments have demonstrated that the bit-error rate of an optical fiber communication system can vary widely due to the random nature of the polarization effects in the system. Using a newly developed receiver model, we show that the bit-error rate depends not only on the optical signal-to-noise ratio but also on the polarization states of the signal and the noise. With the new model w...

We demonstrate here a new dual receiver synchronization scheme that works because we are able to store samples over an entire bit period and then perform an intelligent comparison by methods we introduce. We discuss advantages for message camouflage of transmissions near the noise floor. Our results show better bit error probability performance in comparison to previously published methods. Thi...

In this papec performance improvement of maximumlikelihood sequence estimation (MLSE) receivers operated in jut fading wireless cellular communication channels is investigated. The modijed receiver structure uses a channel classification method based on a decision variable obtainedfrom multiple traffic bursts. By formulating the decision variable using the F-distribution, analytic expressions f...

In this paper we investigate the noise and crosstalk characteristics of all optical router based on SMZ switch using a numerical model. Two effects, the relative intensity noise (RIN) and channel crosstalk (CXT) that degrade the bit error rate (BER) performance of the router are investigated. Numerical simulation results show that for BER of 10, the sensitivity of the receiver with all-optical ...

There is a number of applications requiring a community of many senders to transmit some real-time information to a single receiver. Using unicast connections to send this traffic can result in data implosion and swamp the receiver. In [Domi04], a mechanism was proposed for secure bit transmission in large-scale many-to-one communications; we propose here an extension for securely sending q-ary...