Receiver techniques for microwave digital radio

Chamberlain, Joseph P.; Clayton, F.M.; Sari, Hikmet; Vandamme, Peter

doi:10.1109/mcom.1986.1092974

Cited by 37 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A microwave signal (6) propagates as a transverse electromagnetic wave front. Because the top of the beam experiences a different refractive index to the bottom of the beam, the signal is bent upwards or downwards due to refraction.…”

Section: Multipath Fadingmentioning

confidence: 99%

Microwave signal attenuation at 7.2GHz in Rain and Harmattan Weather

Shoewu¹,

Edeko²

2011

AJSIR

View full text Add to dashboard Cite

Line-of-sight (LOS) attenuation at 7.2GHz was measured in Lagos (6 o 26N, 3 o 52E) for twelve months (Aug '08-July'09) using one of the Nigerian Telecommunications radio signal. The measurement was carried out with the intent of highlighting microwave signal attenuation in Harmattan and rain weather conditions. The results are presented in terms of mean signal level, received signal level and fog attenuation, rain attenuation, multipath fading, free space loss and link availability. The observed attenuation values due to Harmattan (fog) and rain attenuation was calculated (using Altshuler's model). Also, the statistics of fade distribution show fast fading of longer duration of the order of 16 to 39 fades per hour during this period (Harmattan) and 24 to 48 fades per hour during the period of rain. This shows that microwave LOS link in this region and regions with similar climatic characteristics are prone to signal degradation as well as fading in the Harmattan and rain season.

show abstract

Section: Multipath Fadingmentioning

confidence: 99%

Microwave signal attenuation at 7.2GHz in Rain and Harmattan Weather

Shoewu¹,

Edeko²

2011

AJSIR

View full text Add to dashboard Cite

show abstract

“…Also, the severity of fades increases as the distance between antennas increases or as the carrier frequency increases. Fading can also be mitigated by using diversity techniques, in which two or more independent channels are somehow combined [20]. The philosophy here is that only one of these channels at a time is likely to be affected by fading.…”

Section: Multipath Fadingmentioning

confidence: 99%

Physical Media and Channels

Lee

Messerschmitt

1988

Digital Communication

View full text Add to dashboard Cite

Physical Media and ChannelsUltimately the design of a digital communication system depends on the properties of the channel. The channel is typically a part of the digital communication system that we cannot change. Some channels are simply a physical medium, such as a wire pair or optical fiber. On the other hand, the radio channel is part of the electromagnetic spectrum, which is divided by government regulatory bodies into bandlimited radio channels that occupy disjoint frequency bands. In this book we do not consider the design of the transducers, such as antennas, lasers, and photodetectors, and hence we consider them part of the channel. Some channels, notably the telephone channel, are actually composites of multiple transmission subsystems. Such composite channels derive their characteristics from the properties of the underlying subsystems.Section 18.1 discusses composite channels. Sections 18.2 through 18.4 review the characteristics of the most common channels used for digital communication, including the transmission line (wire pair or coaxial cable), optical fiber, and microwave radio (satellite, point-to-point and mobile terrestrial radio). Section 18.5 discusses the composite voiceband telephone channel, which is often used for voiceband data transmission. Finally, Section 18.6discusses magnetic recording of digital data, as used in tape and disk drives, which has characteristics similar in many ways to the other channels discussed.

show abstract

“…In the case of high rate digital transmission, the main cause of perturbation is the selectivity of the multipath propagation channel which induces intersymbol interference [W. D. Rummler et al (1), J. K. Chamberlain et al (2)]. The ultimate object of the studies devoted to multipath propagation is the derivation of an accurate method to compute its effects on the transmission quality of a link with specified characteristics.…”

Section: -Introductionmentioning

confidence: 99%

Measurement Setup to Evaluate BER Performance, Amplitude and Group Delay Dispersions on Digital Radio Links

Zenobio

Russo

Bergamini

et al. 1989

19th European Microwave Conference, 1989

View full text Add to dashboard Cite

ABSTRAT Digital radio-relay systems are particularly affected by the frequency selective nature of multipath fading. To know the effects of propagation on radio-relay systems, an experimental measurement setup was realized to characterize their susceptibility to multipath distortion.The setup is basically a recorder of the frequency-selective amplitude and group delay variations. Associated to these informations, data of error presence (single error, error burst, BER, etc.) are collected to determine, by successive elaborations, relationships between error occurrence and critical values of amplitude and group delay distortions. The measured data are stored only when they exceed the prefixed reference masks. Preliminary results are reported.

show abstract

Receiver techniques for microwave digital radio

Cited by 37 publications

References 21 publications

Microwave signal attenuation at 7.2GHz in Rain and Harmattan Weather

Microwave signal attenuation at 7.2GHz in Rain and Harmattan Weather

Physical Media and Channels

Measurement Setup to Evaluate BER Performance, Amplitude and Group Delay Dispersions on Digital Radio Links

Contact Info

Product

Resources

About