MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications最新文献_第8页

AFSATCOM-Compatible 75 b/s Voice System afsatcom -兼容75b /s语音系统

MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805937

J. Handwerker

引用次数: 0

Interference Effects of Direct-Sequence Spread Spectrum Signal on Voice AM and FM Communication Systems 直接序列扩频信号对话音调幅和调频通信系统的干扰效应

MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805905

M. A. Kader, A. El-Osmany

引用次数: 1

Coding for BPSK SFH/SSMA Communications over Fading Channels 衰落信道下BPSK SFH/SSMA通信的编码

MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805984

E. Geraniotis

引用次数: 3

Applications of Fiber Optics for MILSATCOM Earth Terminals 光纤在军事卫星通信地球终端中的应用

MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4806019

J. Pan, M. Kunz, J. Wilson, J. W. Breitmeier

引用次数: 2

Equalized Megahertz-Bandwidth HF Channels for Spread Spectrum Communications 扩频通信的均衡兆赫频带高频信道

MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805973

S. Dhar, B. D. Perry

{"title":"Equalized Megahertz-Bandwidth HF Channels for Spread Spectrum Communications","authors":"S. Dhar, B. D. Perry","doi":"10.1109/MILCOM.1982.4805973","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4805973","url":null,"abstract":"In this paper we discuss the use of skywave propagation paths in the HF band for spread spectrum communications involving coherent bandwidths of about one megahertz. We present experimental data describing wide-bandwidth one-hop F-layer links, discuss real-time adaptive equalization procedures for wideband spread spectrum signaling on these links, and conclude with some recent measurements over equalized paths of up to 2000 km. Two significant attributes of these equalized wideband channels are (1) time invariance over many seconds (typically ten), and (2) freedom from fading caused by the presence of multiple propagation modes. Both are dependent on achieving mode isolation in the receiver through the use of wideband waveforms. The measurement data was gathered in 1981 using MITRE's wideband HF test facility which consists of a mobile transmit terminal and a fixed receive terminal in Bedford, Massachusetts. The transmit terminal is capable of generating signals for channel measurement and data communications testing. The receive terminal is capable of real-time adaptive equalization over a 1.024 MHz bandwidth, signal processing, and data recording. The data presented here describes unequalized and equalized channel measurements.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125412666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Decision Directed AFC for Noncoherent Detectors Experiencing Large Signal Dynamics 具有大信号动态的非相干检测器的决策定向AFC

MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805960

J. Luecke, R. Yost

引用次数: 0

A Look at Navigation and Secure AJ Communications Technology and their Relation to Precision Oscillators 导航和安全AJ通信技术及其与精密振荡器的关系

MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805963

H. Fruehauf

引用次数: 0

Limiter/Discriminator Detection of Narrowband FM in Jamming and Multipath Environments 干扰和多径环境下窄带调频的限制/鉴别器检测

MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805964

M. Simon, Charles C. Wang

引用次数: 4

Spread Spectrum Multiplexed Noise Codes 扩频多路噪声码

MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4805918

Frank S. Gutleber

{"title":"Spread Spectrum Multiplexed Noise Codes","authors":"Frank S. Gutleber","doi":"10.1109/MILCOM.1982.4805918","DOIUrl":"https://doi.org/10.1109/MILCOM.1982.4805918","url":null,"abstract":"The contents of this paper comprises a treatise on spread spectrum multiplexed noise codes. Multiplexed noise codes are codes formed with mate code pairs which when orthogonally multiplexed, transmitted, and detected in a matched filter possess an impulse autocorrelation function (i.e., noise like codes which compress to a single impulse containing no sidelobes). The fundamental requirement for achieving this desirable result is that the autocorrelation function of the two codes forming a mate pair must be of equal magnitude and opposite sense for all values of time outside of the main lobe. The various fundamental concepts which define the requirements for obtaining lobeless compression, an orthogonal noise code subclass, and basic general code expansion concepts are described and theoretically verified. In addition, a relatively complete coverage of the various unique attributes inherent in multiplexed noise codes are disclosed. In essence, a practical unified theory and explanation of these codes is presented to teach the principles involved and illustrate the magnitude of the gains that are realizable from codes that are capable of compressing to a lobeless impulse and which are available in abundance. The theoretical treatment demonstrates that the concepts and applications are all technically sound. Utilizing the various concepts established, an orthogonal subset of multiplexed noise codes (32 bit mate pair codes) was implemented actively using shift registers and tested in appropriate test configurations to verify that the theoretical performance can be obtained with practical hardware.","PeriodicalId":179832,"journal":{"name":"MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128052182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

EHF SATCOM Terminal Antennas 超高频卫星通信终端天线

MILCOM 1982 - IEEE Military Communications Conference - Progress in Spread Spectrum Communications Pub Date : 1982-10-01 DOI: 10.1109/MILCOM.1982.4806017

R. Varley, J. Conn

引用次数: 1