Download or read book Bit to bit error dependence in direct sequence spread spectrum multiple access packet radio systems written by Robert K. Morrow and published by . This book was released on 1990 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bit to Bit Error Dependence in Direct Sequence Spread Spectrum Multiple Access Packet Radio Systems written by Robert K Morrow (Jr) and published by . This book was released on 1988 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Slotted direct-sequence spread-spectrum multiple-access (DS/SSMA) packet broadcasting systems with random signature sequences are analyzed within the framework of the lower three layers of the International Standards Organization Reference Model of Open Systems Interconnection. At the physical layer, we show that a widely-used Gaussian approximation (which we call the Standard Gaussian Approximation) for the probability of data bit error in a chip and phase asynchronous system is accurate only when there are a large number of simultaneous users on the channel; otherwise, this approximation can be optimistic by several orders of magnitude. For interfering signals with fixed delays and phases relative to the desired signal, however, the Standard Gaussian Approximation is quite accurate for any number of simultaneous users. To obtain a closer approximation to the probability of data bit error for an asynchronous system, we introduce the Improved Gaussian Approximation, which involves finding the distribution of the multiple-access interference variance over all possible delay and phase values and then taking a Gaussian approximation over the support of the distribution and averaging the results. To accurately analyze packet performance at the data link layer, we first use the theory of moment spaces to gain insight on the effect of bit-to-bit error dependence caused by the constant relative delays and (possibly) phases of the interfering signals over the duration of a desired packet. (rh).

Download or read book Sequence Selection for Spread spectrum Packet Radio Systems written by Mark Steven Schmidt and published by . This book was released on 1983 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: A direct-sequence spread-spectrum scheme is applied to multiple-access packet radio systems. Algorithms that find signature sequence phases of Gold sequences with low correlation parameter values are explored. The average probabilities of error for sets of Gold sequences are shown to be dependent on the phases of the sequences. Keywords: Packet radio, Spread spectrum, Multiple access. (rh).

Download or read book Thoughput Performance of Spread Spectrum Multiple Access Packet Radio Networks written by Stanford University. Computer Systems Laboratory and published by . This book was released on 1987 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Direct sequence Spread spectrum Packet Radio Performance written by Dana John Taipale and published by . This book was released on 1984 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive Direct sequence Spread spectrum Communications written by Rahul Singh and published by . This book was released on 1996 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Binary Sequences for Direct Sequence Spread Spectrum Multiple Access Communication Systems written by 陳子健 and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "A Study of Binary Sequences for Direct-sequence Spread-spectrum Multiple-access Communication Systems" by 陳子健, Chi-kin, John Baptist, Chan, 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_b3121276 Subjects: Spread spectrum communications

Download or read book The Performance of Direct sequence Spread spectrum Multiple access Systems Including Jamming and Partial Code Correlation Effects written by Nersi Nazari and published by . This book was released on 1987 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Error Probability for Direct Sequence Spread Spectrum Multiple Access Communications Part II Approximations written by Evaggelos A. Geraniotis and published by . This book was released on 1981 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spread spectrum Communication Systems and Applications written by and published by . This book was released on 1994 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Packet error probabilities in frequency hopped spread spectrum packet radio networks Markos frequency hopping patterns considered written by M. Georgiopoulos and published by . This book was released on 1987 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Error Probability for Direct Sequence Spread Spectrum Multiple Access Communications Part I Upper and Lower Bounds written by Michael B. Pursley and published by . This book was released on 1981 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Packet Error Probabilities in Frequency Hopped Spread Spectrum Packet Radio Networks Markov Frequency Hopping Patterns Considered written by M. Georgiopoulos and published by . This book was released on 1987 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: We compute the packet error probability induced in a frequency-hopped spread spectrum packet radio network, which utilizes first order Markov frequency hopping patterns. The frequency spectrum is divided into q frequency bins and the packets are divided into M bytes each. Every user in the network sends each of the M bytes of his packet at a frequency bin, which is different from the frequency bin used by the previous byte, but equally likely to be any one of the remaining q-1 frequency bins (Markov frequency hopping patterns). Furthermore, different users in the network utilize statistically independent frequency hopping patterns. Provided that, K users have simultaneously transmitted their packets on the channel, and a receiver has locked on to one of these K packets, we present a method for the computation of P sub e (K) (i.e. the probability that this packet is incorrectly decoded). Furthermore, we present numerical results (i.e. P sub e (K) versus K) for various values of the multiple access interference K, when Reed Solomon (RS) codes are used for the encoding of packets. Finally, some useful comparisons, with the packet error probability induced, if we assume that the byte errors are independent, are made; based on these comparisons, we can easily evaluate the performance of our spread spectrum system.

Download or read book Probability of Capture and Rejection of Primary Multiple Access Interference in Spread Spectrum Networks written by and published by . This book was released on 1987 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The probability of capture is evaluated for the situation in which several transmitters use the same spread-spectrum code to contend for the attention of a single receiver. The first stage in the capture mechanism is that of acquisition of capture; randomization of the arrival time has been proposed by Davis and Cronemayer to provide delay capture and the probability of this occurrence has been derived. We are concerned with the second stage, that of retaining capture in the presence of interference from the contending users. The probability of retaining capture is computed via accurate approximations and upper bounds for direct-sequence, frequency-hopped and hybrid spread- spectrum signaling formats and for different data modulation and demodulation schemes. The calculation of the overall probability of capture is carried out for spread-spectrum systems with and without forward-error-control; in the latter case Reed-Solomon codes, as well as binary convolutional codes, are considered. Finally, the capability of rejecting primary multiple-access interference in spread-spectrum radio networks is examined by computing the maximum number of users which can contend for the same receiver without causing the probability of capture to fall below some desirable level.

Download or read book Poetry from Bombay written by Jagdish Shivpuri and published by . This book was released on 1977 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interference Analysis of a Multihop Packet Radio Network Employing Direct sequence Spread spectrum Signaling written by Fang Wang and published by . This book was released on 2002 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Kane Bill 1951 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The folder may include clippings, announcements, small exhibition catalogs, and other ephemeral items.