Author: Gregory Paul RogersPublisher:
ISBN:
Category :
Languages : en
Pages : 68
Book Description
Study of an Acquisition Scheme for Direct Sequence Spread Spectrum Signals
Author: Gregory Paul RogersAcquisition of Multicarrier Direct-sequence Spread-spectrum Signals
Author: Frederick J. BlockSequential Acquisition Schemes for Direct-sequence Spread-spectrum Systems
Author: Gurudutt S. HosangadiPublisher:
ISBN:
Category :
Languages : en
Pages : 144
Book Description
Spread Spectrum, Acquisition and Tracking
Author: Donald L. SchillingPublisher:
ISBN:
Category :
Languages : en
Pages : 58
Book Description
This report discusses the following subjects: A New Rapid Acquisition Technique for Direct Sequence Spread Spectrum Communications. The rapid acquisition technique described here can be used in direct sequence spread spectrum systems. The technique employs a double threshold which defines when a decision can be made. These thresholds change at each examination instant. Using this technique a significant reduction in the acquisition time of a direct sequence spread spectrum signal is obtained. A New Double Threshold Acquisition Scheme Applied to the Fading Channel in Frequency Hopping Spread Spectrum.
Performance Bounds for a Simple Acquisition Scheme for Direct Sequence Spread Spectrum Communication Systems
Author: Eric Mathew OllilaAcquisition of Direct Sequence Spread Spectrum Signals Using Digital Signal Processing Techniques
Author: Ronald E. Schmitz (CAPT, USAF.)Publisher:
ISBN:
Category : Signal processing
Languages : en
Pages : 250
Book Description
Rapid Acquisition Time Determination, Techniques, and Performance of Direct Sequence Spread Spectrum Signals
Author: Eric Conway MacCallaPublisher:
ISBN:
Category : Spread spectrum communications
Languages : en
Pages : 438
Book Description
Acquisition Techniques for Direct Sequence Spread Spectrum Packet Radio Systems
Author: Zhen-liang ShiPublisher:
ISBN:
Category : Spread spectrum communications
Languages : en
Pages : 406
Book Description
Effects of Fading and Data Modulation on Noncoherent M-sequence Acquisition Schemes
Author: Patrick J. VincentPublisher:
ISBN:
Category : Communication
Languages : en
Pages : 101
Book Description
In direct-sequence spread-spectrum systems, successful communications require phase synchronization of the m-sequence in the incoming signal with a locally generated m-sequence at the receiver. Many acquisition schemes which extract the phase of an incoming m-sequence have been studied, but most of them assume coherent demodulation (which is usually not available during acquisition) and or independent samples (which introduce a loss in the effective signal to noise ratio (SNR)). This thesis investigates the performance of two m-sequence acquisition schemes in the presence of fading and data modulation. A fixed sample size test and a truncated sequential test are studied without the usual assumptions of coherent demodulation or independent samples. The effects of fading and data modulation on our schemes' probability of false alarm, probability of detection and test length are thoroughly explored. We find that channel fading in effect induces a loss of signal SNR, but the desired power of the tests can be restored by suitable adjustments in the decision processor. We find that the effects of data modulation are less severe, but more problematic to correct.
Acquisition of Direct Sequence Spread Spectrum with Modulation and Tone Jamming
Author: Eric William SiessPublisher:
ISBN:
Category : Interference (Sound)
Languages : en
Pages : 372
Book Description