A bandwidth adjustable integrated optical receiver having an on-chip silicon avalanche photodetector is realized with standard 0.25-μm silicon-germanium bipolar complementary metal-oxidesemiconductor technology for optical interconnect applications. With the controllable capacitive degeneration technique, the optical receiver bandwidth can be adjusted for the best bit error rate performance.

Bit-interleaved coded phase and amplitude modulation over frequency-non-selective Ricean fading channels without channel state information at the receiver is studied. We propose a low-complexity noncoherent receiver structure which is very well suited to time-variant fading transmission scenarios, and which provides gains of several dB’s in power efficiency compared to conventional differential...

This paper presents how to design Quasi-Orthogonal Space Time Block Coding for multiple transmitting antennas and one receiver with feedback. Multipath wireless environment creates difficulty because of diversity at multiple receivers and multiple transmitters. Diversity is reduced by using Quasi-Orthogonal STBC. For simplicity we considered four transmitters and one receiver. The diversity is ...

For 5G it will be important to leverage the available millimeter wave spectrum. Communication at high carrier frequencies requires antenna arrays at both the base and mobile station. A 1-bit analog to digital converter can effectively reduce the complexity and power consumption of the analog receiver frontend. This is especially interesting in the context of large antenna arrays with a sizable ...

Orthogonal frequency division multiplexing (OFDM) has become a promising method for many wireless communication applications. However, one main drawback of OFDM systems is the high peak-to-average power ratio (PAPR). Selected mapping (SLM) is a well-known technique to decrease the problem of high PAPR in OFDM systems. In this method, transmitter is obliged to send some bits named side informati...

Bit-interleaved coded phase and amplitude modulation over frequency-non-selective Ricean fading channels without channel state information at the receiver is studied. We propose a low-complexity noncoherent receiver structure which is very well suited to time-variant fading transmission scenarios, and which provides gains of several dB’s in power efficiency compared to conventional differential...

An integrated variable delay receiver for DPSK optical transmission systems is presented. The device is realized in silicon-on-insulator technology and can be used to detect DPSK signals at any bit-rates between 10 and 15 Gbit/s. Keywordsdifferential phase-shift keying, interferometer, optical receiver, tunable delay-lines, silicon photonics

Information security is an important factor when critical information transferred. This paper concentrates on finding a method that can hide message in image without making any changes to it. The proposed novel and based the Least Significant Bit (LSB) with high imperceptibility capacity. Initially, secret bits are compressed using LZW technique, then embedded into LSB of edge pixels cover whic...

This article describes a receiver structure for trellis-coded pulse-position modulation (T-PPM) for optical communication systems. Monte Carlo simulation results of the Viterbi decoding algorithm under realistic Webb modeling of the avalanche photodiode (APD)-based receiver are compared with asymptotic bounds on performance. These results show that T-PPM can reduce the loss in performance incur...