Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 46 for “"FSK"”.
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Trellis-coded permutation modulation for improved performance of narrowband noncoherent FSK
… ways to improve the performance of noncoherent FSK in narrowband channels. It is shown that FSK permutation modulation has better spectral efficiency than conventional FSK modulation" but with the tradeoff on reduced energy efficiency. To overcome this problem, we apply trellis-coded modulation …
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Performance analysis of Binary FSK signals with L-Fold diversity selection combining techniques in a Nakagami-M fading channel
… a non-coherent Binary Frequency Shift Keying (BFSK) receiver using Selection Combining techniques over a frequency non-selective, slowly fading Nakagami channel. These techniques are independent of the number of diversity branches, so simpler receivers can be employed. First order selection …
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Design and Performance Analysis of Frequency-Shift Keyed Transmitter using Rapidly Tunable Lasers
Optical Frequency Shift Keying (FSK) is a modulation scheme that encodes data in the wavelength of a carrier signal. Due to the large amount of optical bandwidth available in the erbium, 1.55-𝜇m telecom band, FSK can potentially utilize a wide spectrum to achieve multi-Gb/s channel bandwidths. For …
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An analytical and experimental investigation of a frequency- shift-keyed signal generated by a phase-locked-loop with application to narrowband FSK
… systems employing frequency-shift-keyed (FSK) carrier modulation demand careful consideration of system transient responses. Discontinuous waveforms or their derivatives, such as produced by frequency modulation, can result in the generation of large transient currents and voltages. These …
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Involuntary Signal-Based Grounding of Civilian Unmanned Aerial Systems (UAS) in Civilian Airspace
… WAN, Bluetooth 5, and Frequency Shift Keying (FSK) for their long range capabilities. Of the three technologies, LoRa WAN transmitted the farthest, however the FSK module transmitted a comparable distance at a lower power. The power measurements were taken using existing modules, however, due …
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Bit error simulation of FSK, BPSK, and pi/4 DQPSK in flat and frequency-selective fading mobile radio channels using two-ray and measurement- based impulse response models
… tool, we studied average BER results for FSK, BPSK, and Ï /4 DQPSK with Nyquist pulse shaping in indoor and outdoor, flat and frequency-selective fading channels. The BER performance of Ï / 4 DQPSK using the data rate and the pulse shaping requirement in the U.S. Digital Cellular Standard …
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The Role of Phosphodiesterases in Cyclic Nucleotide Compartmentation Across Different Pathways in the Adult Rat Ventricular Myocyte
… prostaglandin E2 (PGE2; 10 nM) and forskolin (FSK; 30 nM), on various cellular parameters in the presence of either cilostamide (1 µM) a selective PDE3 inhibitor, or Ro 20-1724 (10 µM) a selective PDE4 inhibitor. In myocytes treated with PGE2, unloaded cell shortening and intracellular calcium …
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Architecture for ultra-low power multi-channel transmitters for Body Area Networks using RF resonators
… startup time, simple modulation schemes of OOK, FSK and BPSK and high datarates of 1Mbps. An architecture that is suited for the unique requirements of transmitters in these BANs is developed. RF Resonators, and in particular Film Bulk Acoustic Wave Resonators (FBARs) are explored as carrier …
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Digital Transmission by Hermite N-Dimensional Antipodal Scheme
… transmission, outperforms constant envelope FSK in terms of spectrum efficiency. With a simple FM detector, the bit error rate of HK is as good as that of non-coherent FSK. In a frequency selective fading channel, the simulation results suggest that specific data bits of HK are relatively …
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Performance of Digital Communications Over Selective Fading Channels
… keyed (DPSK) and binary frequency-shift keyed (FSK) communications with primary emphasis on the effects of intersymbol interference produced by the frequency-selective character of WSSUS fading channels.
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Adenylyl Cyclase 2 Selectively Regulates IL-6 Expression in Human Bronchial Smooth Muscle Cells
… isoforms had distinct effects on forskolin (Fsk)-induced expression of a number of known cAMP-responsive genes in human bronchial smooth muscle cells (BSMC) and human embryonic kidney cells (HEK-293). Most notable, in BSMC overexpression and activation of AC2 enhanced interleukin 6 (IL-6) …
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Error-rates of digital signaling with coherent and noncoherent detections
… keying (ASK), frequency-shift keying (FSK), and phase-shift keying (PSK), for both binary coded and M-ary coded transmissions are presented in this paper. The analysis is limited to only nonfading received signal in additive Gaussian noise. Both coherent and noncoherent detection …
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Extending the Flexibility of an RFIC Transceiver Through Modifications to the External Circuit
… family of low cost, half duplex, FM/AM/ASK/FSK RFIC transceivers originally intended for operation in the 433, 868, or 902-928 MHz industrial, scientific, and measurement (ISM) bands. Examinations of the operating principles of the transceiver components were performed which facilitated the …
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Spread spectrum satellite multiple access and overlay service
… systems which use a form of noncoherent M-ary FSK (MFSK) as the primary modulation and analyzes their throughput. The analysis considers such factors as satellite power constraints and adjacent satellite interference. It considers the effect of onâ board processing on the multiple access …
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Performance Analysis Of Low-power, Short-range Wireless Transceivers
… and characterization of a popular binary FSK transceiver TRF6901 from Texas Instruments. The performance analysis of the device is done with respect to the TRF/MSP430 demonstration and development kit.
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Performance of a wideband CDMA system under multipath fading
… (CDMA) system using wideband M-ary FSK as bandpass modulation. The immediate analysis and determination of the average probability of bit error is made inherently more difficult because of two random effects. The first disturbance encountered in the analysis is the existence of …
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Analysis of digital communication signals and extraction of parameters
… Shift Keying (QPSK), Frequency Shift Keying (FSK), and On-Off Keying (00K). The analysis emphasizes the use of available signal processing software. Detection methods compared include broadband energy detection, FFT- based narrowband energy detection, and two correlation methods which employ …
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Sex differences in the cardiac beta-adrenergic receptor contractile response
… sex differences no longer present. Forskolin (FSK), IBMX and CPT-cAMP dose response studies were performed in the isolated heart to investigate the role of adenylyl cyclase, phosphodiesterase and the cAMP signaling cascade, respectively, in generating sex differences in the &beta-adrenergic …
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