Spread-spectrum signals always carry information in digital form. The equations given for communication jamming apply directly to slow-hopping frequency-hopping (FH) signals. It has been necessary for the jamming system to determine the transmission frequency and apply jamming to the desired receiver ...
This white paper discusses the concept and techniques of spread spectrum communications, initially developed for military use to enhance secure communications. Spread spectrum systems spread a signal over a wider frequency band than the original message while transmitting at the same signal power, makin...
Part1 INTRODUCTIONTO SPREAD-SPECTRUM COMMUNICATION Source:SPREADSPECTRUMCOMMUNICATIONSHANDBOOK DownloadedfromDigitalEngineeringLibrary@McGraw-Hill(.digitalengineeringlibrary) Copyright©2004TheMcGraw-HillCompanies.Allrightsreserved. AnyuseissubjecttotheTermsofUseasgivenatthewebsite. INTRODUCTIONTOSPREAD-SPECTRUM...
[关键词]直接序列扩频系统伪随机序列仿真 Thejammingofspreadspectrumcommunications systemandtechnologyofsimulation XiDianUniversityFengQi [Abstract]Spreadspectrumcommunicationshasmanybasic mannersofimplementation,thispapermainintroducesthedirect sequencespreadspectrumtechnology.Thetechnologyofdigital signals’modulationanddemodulat...
Spread spectrum transmitter, spread spectrum recei 优质文献 相似文献 参考文献 引证文献Multi-channel spread spectrum communications system A multi-channel spread spectrum communications system utilizes the combination of spreading codes to represent and transfer information. On the transmitter side, every block...
Spread Spectrum Communications Handbook, Electronic Edition 2025 pdf epub mobi 电子书 著者简介 Mark K. Simon, an internationally recognized expert on spread-spectrum systems, is a senior scientist at Jet Propulsion Laboratory. Jim K. Omura is founder and chairman of Cylink Corporation, which designs...
Binary direct-sequence spread-spectrum multiple-access communications, an additive white Gaussian noise channel, and a coherent correlation receiver are co... Lehnert,J.,Pursley,... - 《Communications IEEE Transactions on》 被引量: 661发表: 1987年 Spread-Spectrum Multiple-Access Communications In a...
6.1 Spread Spectrum There are several basic modulation techniques such as frequency modulation, amplitude modulation and digital modulation. However, such modulation of the original message signal on a fixed carrier wave makes the resultant signal wave vulnerable to tampering and jamming. Such a modulate...
In this chapter, we first introduce spread spectrum-based anti-jamming techniques in Sect. 2.1. We then investigate the anti-jamming transmissions based on frequency hopping in Sect. 2.2, and present DSSS-based anti-jamming systems in Sect. 2.3. We discuss the challenges of jammers in ...
The broad-band noise performance of a spread spectrum system with frequency hopping and sequentially balanced modulation was analyzed in Part I of this paper. Here, the analysis is extended to include operation In jamming environments and in specular multipath. Bit-error probability and ranging accura...