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 7 of 7 for “"Data Modulation"”.
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Signal modulation and relative intensity noise properties of transistor laser and nano-cavity VCSEL
… benefits for high speed direct current/voltage modulation capability. We have demonstrated simultaneous E/O data modulation at 20 and 40 Gb/s, and the output signal linearity improvement of both optical and electrical signals of transistor lasers. These provide TL intrinsic advantages for …
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Serial acquisition of PN sequences in direct sequence spread spectrum communication systems
… assumptions invoked in this thesis are that no data modulation is present during the acquisition process, and that the RF carrier has already been perfectly acquired, both in frequency and phase. Within this context, two basic models are considered, the chip synchronous model and the chip …
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A Compatible Modulation Strategy for Embedded Digital Data Streams within High Quality Video Signal Transmissions
… are still alive. In parallel, discussions upon data broadcasting, predominantly within the current analogue television systems also have taken place.<br/><br/>The underlying premise of the work presented, is based upon the objective to transmit a compatible enhanced definition television signal …
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Code-division multiplexing
… imposition of practical pulse shapes for carrier modulation, we show that multi-carrier format using cosine functions has higher bandwidth efficiency than the single-carrier format, even in an ideal Gaussian channel model. Each pulse is shaped via a prototype baseband filter such that when the …
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Null power reallocation for data rate improvement in a wireless multicarrier system
Multicarrier systems are advantageous for high data rate transmissions in wireless environments due to their ease of implementation and tolerance for multipath delay spread. Currently, these systems as specified by the IEEE 802.11 standards do not adapt to frequency-selective fading but simply …
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Magnetic Communication in Harsh Environments Employing High-Sensitive Wideband Magnetic Field Sensors
… unable to provide sufficiently fast and stable data transmission for modern applications. Examples include underground and underwater communication, as well as data transmission in process engineering, e.g., communication in chemical reaction tanks. A promising approach to overcome these …
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A novel maximal-length sequence synchronisation network
Spread Spectrum has become a popular digital modulation scheme in recent years. The advantages the scheme offers, at the expense of bandwidth, make it attractive in a multitude of commercial applications. The most common method, and the one of interest in this thesis, of generating Spread Spectrum …