Author: Robert Charles HanlonPublisher:
ISBN:
Category :
Languages : en
Pages : 206
Book Description
Error Performance of Direct Sequence Spread Spectrum Systems on Nonselective Generalized Rayleigh Fading Channels
Author: Robert Charles HanlonPublisher:
ISBN:
Category :
Languages : en
Pages : 206
Book Description
Error Performance of Direct Sequence Spread Spectrum Systems on Nonselective Generalized Rayleigh Fading Channel
Author: Robert Charles HanlonPublisher:
ISBN:
Category :
Languages : en
Pages : 113
Book Description
The error performance of direct-sequence spread spectrum multiple-access communications systems on nonselective fading channels is investigated. The channels considered are those for which the fading intensity is slow, nonselective, and exhibit a generalized Rayleigh distribution. The generalized Rayleig distribution encompasses the important special cases of a Rician (specular plus Rayleigh) fading, Nakagami m-distributed fading, and Rayleigh fading. Results are obtained for the special cases of a single cochannel interferer without additive noise and multiple independent cochannel interferers with additive white Gaussian noise. The results are developed as a series expansion in the moments of the cross-correlation between the spreading codes (single interferer) or a series expansion in the powers of the second moment of the code cross-correlation (multiple interferers). To develop simple estimates of the probability of error, empirical estimates of the low-order cross-correlation moments of the spreading codes (taken to be Gold codes) are developed from a generalized gamma density approximation based on the cross-correlation moments for both Gold codes and random codes. Numerical results for the probability of error are obtained with these estimates and compared with the results based on exact moments developed from the code cross-correlation probability density. (Author).
Scientific and Technical Aerospace Reports
Author: Kane, Bill, 1951-
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The folder may include clippings, announcements, small exhibition catalogs, and other ephemeral items.
Performance Analysis of Direct-sequence Spread-spectrum Multiple-access Communication Via Fading Channels
Author: David Edward BorthPublisher:
ISBN:
Category :
Languages : en
Pages : 366
Book Description
The performance of biphase direct-sequence spread-spectrum multiple-access (SSMA) communication for a general class of fading channels is investigated. The channels considered are those for which the channel output consists of a strong stable specular signal plus a faded version of this signal. Such channels are the result of a transmission medium which gives rise to a major stable communication path and a number of additional weaker communication paths. The fading channel is modeled as a general is modeled as a general wide-sense-stationary uncorrelated-scattering (WSSUS) channel -- a model which is general enough to exhibit both time and frequency selectivity and to impose no restrictions on the fading rate. A discussion of the important parameters of the WSSUS channel is given and two important classes of WSSUS channels are developed from the general fading channel model; time-selective fading channels and frequency-selective fading channels. In analyzing the performance of direct-sequence SSMA communications via fading channels two measures of system performance that are considered are average signal-to-noise ratio at the receiver output and the average probability of error. (Author).
A Study of Direct-Sequence Spread-Spectrum Multiple-Access Communications Over Multipath Rayleigh Fading Channels
Author: 葉冠華Publisher: Open Dissertation Press
ISBN: 9781374766402
Category :
Languages : en
Pages :
Book Description
This dissertation, "A Study of Direct-sequence Spread-spectrum Multiple-access Communications Over Multipath Rayleigh Fading Channels" by 葉冠華, Kun-wah, Yip, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3123454 Subjects: Spread spectrum communications
Direct Sequence Spread Spectrum Acquisition in Nonselective and Frequency Selective Fading Channels
Author: Essam A. SourourTechnical Abstract Bulletin
Author: Adaptive Data Rate Multicarrier Direct Sequence Spread Spectrum in Rayleigh Fading Channel
Author: Narender Reddy MannemPublisher:
ISBN:
Category : Adaptive signal processing
Languages : en
Pages : 103
Book Description
A Study of Direct-sequence Spread-spectrum Multiple-access Communications Over Multipath Rayleigh Fading Channels
Author: Kun-wah YipPublisher:
ISBN:
Category : Spread spectrum communications
Languages : en
Pages : 248
Book Description