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Showing 1 to 19 of 19 for “"Receiver sensitivity"”.
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Linearly repeatered communication systems using optical amplifiers
Receiver sensitivity is an important parameter in the design of optical communication systems. Prior results on receiver sensitivity for on-off keying modulated direct detection systems with an optical preamplifier are generalized for the cases of frequency-shift keying and subcarrier modulation. …
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High Speed Optical Links Using CAP Modulation and Novel Equalisation Techniques
… interference (CCI) and ISI in the link at the receiver side. Performance comparisons are studied between the CAP-16 scheme using CAP equaliser and a conventional equaliser, pulse amplitude modulation (PAM-4) scheme, and discrete multitone (DMT) scheme. CAP based data transmission of 112 Gb/s is …
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Receivers for energy efficient optical interconnects
… (BER) requirements under given channel loss and receiver sensitivity conditions. Consequently, improving IM-DD receiver sensitivity directly helps to lower laser diode power consumption. An inevitable trade-off between IM-DD receiver noise and bandwidth limits the maximum achievable receiver …
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Effect of Dispersion on SS-WDM Systems
… system performance is expressed in term of the receiver sensitivity defined as the average number of photon per bit <i>N<sub>p</i> </sub>required for a given probability of bit error <i>P<sub>e</sub></i>. The receiver sensitivity is expressed in terms of two normalized parameters: the ratio of …
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Tunnel filters and optical amplifiers for use in fiber optic communication systems
… tunnel filter. Optical amplifiers used as a receiver preamplifier and as linear intermediate repeaters are evaluated. Performance parameters of particular interest are the receiver sensitivity and the total system gain. The effects of optical amplifier gain and bandwidth on those parameters …
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A 9GHz injection locked loop optical clock receiver in 32-nm CMOS
… distribution. The injection-locked loop clock receiver that suits this architecture breaks the bandwidth/sensitivity tradeoff, and a self-adjusting mechanism is added to increase robustness. The simulated receiver sensitivity is - 14dBm at 9GHz, consuming 77.14pW and generating jitter within 0. …
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SOA enhanced optical line terminal for future optical access network
… network units (ONUs). Conventional burst-mode receivers rely on transimpedance amplifiers (BM-TIAs) that adjust electrical gain for each burst, but their limited linearity and bandwidth restrict scalability to higher speeds. As IM/DD systems approach and exceed 100 Gb/s per wavelength, they …
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2GHz W-CDMA Radio Transceiver
… transmit power control (TPC), two independent receivers in conjunction with automatic gain control (AGC) and automatic frequency control (AFC), and one common synthesizer. Data exchange between the radio and the baseband processor takes place in an 8-bit digital format. Digital-to-analog …
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Tunable narrow bandpass Sigma-Delta analog-to-digital conversion for mobile communication terminals
A whole-of-band receiver structure is proposed. In this structure, the whole mobile band (125 channels for GSM) is digitized and channel selection is performed using DSP filters. The ADC is a critical component in this structure, requiring 13bits resolution at sampling rate of 50MHz . A modified ΣΔ …
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Multi slot amplitude coding technique for high speed optical fiber communication system
… performance of 310 Gbit/s MSAC is -26 dBm for receiver sensitivity (RS) and 25.5 dB for optical signal-to-noise ratio (OSNR). The improvement of 3.5 dB for RS and 3.7 dB for OSNR are obtained when optimize level spacing is implemented. When compared to DCDM, the spectral width is reduced by …
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Low noise techniques applied to a piezoceramic receiver for gas coupled ultrasonic flaw detection
… the aim of establishing the absolute limits of receiver sensitivity in terms of both Minimum Detectable Power (MDP) and Minimum Detectable Force (MDF). The central feature of the work has been the development of two independent theories which provide identical results. One theory is based on an …
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Biodiversity and dynamics of direction finding accuracy in bat biosonar
… systems of bats, emitted acoustic energy and receiver sensitivity are distributed over direction and frequency through beampattern functions that have diverse and often complicated geometries. This complexity could be used by the animals to determine the direction of incoming sounds based on …
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Self-Interference Cancellation for Simultaneous Transmit and Receive (STAR) Applications
… Due to advancements in Radio Frequency (RF) receiver and antenna hardware, as well as electromagnetic computation software, this technology is becoming more and more realisable, with applications in the fields of radar and communications. For a STAR system to be effective, high isolation (in …
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Advanced Orthogonal Frequency-Division Multiplexing Systems with Cyclic Prefix-Less Multiple-Input and Multiple-Output Discrete Fourier Transform Spreading and Unmanned Aerial Vehicles-Assisted Cyclic Postfixed Windowed Schemes
… constrained transmission power, user equipment receiver sensitivity, coverage area, and severe mmWave path loss. We present a Non-terrestrial downlink wireless communication system using a Cyclic Postfixed Windowed Orthogonal Frequency Division Multiplexing (CPW-OFDM) signal format. We …
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Saddlepoint Approximation for Calculating Performance of Spectrum-Sliced WDM Systems
… WDM systems with an optical preamplifier receiver there is an optimum m=BoT (Bo = optical channel bandwidth, T = bit duration) to minimize the average number of photons-per-bit (Np) required at the receiver for a given error probability (Pe). Both the optimum m and the minimum increase as …
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Analysis, Design and Performance Evaluation of Optical Fiber Spectrum-Sliced WDM Systems
… noise which results in a power penalty at the receiver. One way to minimize this penalty, as proposed and analyzed for the first time in this work, is to use an optical preamplifier receiver. It is shown that when an optical preamplifier receiver is used, there exists an optimum filter …
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Digital pulse interval modulation for optical communication systems
… are discussed.</p> <p>A detailed account of the receiver performance is given. Receiver analysis was carried out for narrow band as well as for wide band channels. Possible error sources are presented and the system performance degradation with these error sources is discussed and a comparison is …
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Transmission Capacity Improvement for Single Photon Avalanche Diode-based Optical Communication Using PAM Modulation
… of single photon avalanche diode (SPAD) optical receivers. Currently, for non-optically amplified optical communication links that use intensity modulation with direct detection, the highest optical sensitivity is achieved using avalanche photodiodes. However, the excess noise generated within …
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Communication-Theoretic Foundations for Optical Receivers Using Dynamically Biased Avalanche Photodiodes
… with optimized internal gain (leading to high sensitivity) to reduce cost. Avalanche photodiodes (APDs) are commonly used photodetectors in many high-speed optical receivers due to their internal optoelectronic gain, which allows the photogenerated current to dominate the thermal noise without …