Proceedings Article10.1109/ISSSTA.1994.379576
The spread spectrum code hopping system
Takeshi Onizawa,Takaaki Hasegawa +1 more
- 04 Jul 1994
- pp 287-291
16
TL;DR: In this article, a spread spectrum code hopping (CH) system is described, which has some analogy to frequency hopping systems, and the performance of CH systems under single code interference, which will frequently arise in the future on consumer communications and seriously affects direct sequence systems, is evaluated by theoretical analysis and computer simulations.
read more
Abstract: Consumer communications employing spread spectrum techniques have been developed. The spread spectrum code hopping (CH) system, which has some analogy to frequency hopping systems, is described. The performance of the CH systems under single code interference, which will frequently arise in the future on consumer communications and seriously affects direct sequence systems, is evaluated by theoretical analysis and computer simulations. It is shown that CH systems perform better than conventional ones under single code interference. >
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
•Proceedings Article
On the capacity of a cellular CDMA system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Andrew J. Viterbi,L.A. Weaver,Charles E. Iii Del Mar Wheatley +5 more
- 01 Jan 1991
TL;DR: It is concluded that properly augmented and power-controlled multiple-cell CDMA (code division multiple access) promises a quantum increase in current cellular capacity.
2.9K
Variability of user performance in cellular DS-CDMA-long versus short spreading sequences
TL;DR: The uplink performance in a cellular direct-sequence code-division multiple-access system using long and short spreading sequences is compared in terms of the distribution of the bit-error probability.
Collision mitigation by log-likelihood ratio (LLR) conversion in orthogonal code-hopping multiplexing
TL;DR: Log-likelihood ratio (LLR) conversion schemes greatly reduce the required SNR in channel decoding even when the perforation probability is high, and several estimation methods are proposed to avoid accurate estimation.
Performance Analysis of Orthogonal Frequency and Code Hopping Multiplexing
TL;DR: The proposed OFCHM scheme for downlink multiplexing to provide efficient support of packet traffic with low/medium data rates in a spread OFDM environment yields a larger overall downlink capacity than a dedicated resource allocation/multiplexing scheme.
13
Code hopping - direct sequence spread spectrum to compensate for intersymbol interference in an ultra-wideband system
Sung Han Chung,Peter J. McLane +1 more
TL;DR: The central idea is that code hopping (CH) affects ISI amplitudes that are produced by both the cross-and the auto-correlation properties of spreading codes for codewords; not just by the latter as occurs without CH.
10
References
A spread-spectrum technique for high-capacity mobile communications
George R. Cooper,R.W. Nettleton +1 more
TL;DR: The spectral efficiency of the spread-spectrum scheme may exceed those of the narrow-band schemes by a factor of almost five, and more ambitious bit-rate-reducing speech digitization methods could improve still further on these figures.
On the capacity of a cellular CDMA system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Andrew J. Viterbi,L.A. Weaver,Charles E. Iii Del Mar Wheatley +5 more
TL;DR: In this paper, the interference-suppression feature of CDMA (code division multiple access) can result in a many-fold increase in capacity over analog and even over competing digital techniques.
Spread-spectrum signal acquisition: Methods and technology
S. Rappaport,D. Grieco +1 more
TL;DR: A system and method of driect-sequence spread-spec trum TDMA (or TDD) digital communication, wherein acquisition and tracking occurs for a plurality of frames having a predetermined number of time slots and carries acquisition and sync digital information.