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 8 of 8 for “"Gold codes"”.
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Spreading and power control for multiple antenna transmit diversity
… wideband CDMA framework using multiple phases of Gold codes for spreading on different antennas. We evaluate the performance of this scheme and show that it performs well for a wide range of SNR values. We illustrate a strategy for using channel coding along with the new scheme. Unlike most other …
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Generalized discrete Fourier transform with non-linear phase : theory and design
… Fourier transform (DFT), Walsh transform, and Gold codes have been successfully used over several decades in various engineering applications, including discrete multi-tone (DMT), orthogonal frequency division multiplexing (OFDM) and code division multiple access (CDMA) communications systems. …
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Evaluation of coding scheme for MIMO radar
… full diversity gain. The code length of the used Gold codes is an important factor for this effect. However, in this thesis a coding scheme related to the Alamouti scheme in Communication is presented, this scheme under some constraints is capable of maintaining orthogonality between the signals …
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Neuromorphic cross correlation of digital spreading codes
… communication systems that use digital spreading codes to divide a single communication medium into separate channels. This technology is used in many systems such as GPS, ZigBee and GSM mobile communications. The technology is renowned for its robustness and security since it is highly tolerant …
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Electrical Impedance Tomography/Spectroscopy (EITS): a Code Division Multiplexed (CDM) approach
… use of Code Division Multiplexing (CDM) using Gold codes in Electrical Impedance Tomography and Spectroscopy. The results obtained showed 3.5% and 6.2% errors in determining the position and size of imaged anomalies respectively, with attainable imaging speed of 462 frames/second. These results …
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Effects of Cross-Correlation Interference on an Optical Code Division Multiple Access Communication System
… the normalized cross-correlation between user codes. Numerical results are obtained for systems of two users, for both length 31 and 127 Gold codes. Analysis of a random sampling of the length 31 codes has shown that performance is significantly dependent on the magnitude of the normalized …
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Lokalizace akustických zdrojů metodou TDOA
Práce se zabývá teoretickým a praktickým řešením akustické lokalizace metodou TDOA. Rozvádí návrh schémat pro vysílač a přijímač. Dále uvádí způsob komunikace mezi procesorem, který vyhodnocuje přijatý signál, a počítačem, jež výsledek zobrazuje ve srozumitelné podobě. A nakonec se zabývá návrhem …
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Evolution of loosely synchronized spreading codes in code-division multiple-access systems
Loosely Synchronized (LS) codes can be used as spreading codes in quasi synchronous code-division multiple-access (QS-CDMA) systems. In such CDMA systems, close control of synchronization is achieved at the chip level, interme diate between that in synchronous CDMA and that in asynchronous CDMA. …