Communication

Download Broadband Fixed Wireless Access: A System Perspective by Marc Engels PDF

By Marc Engels

This introductory quantity presents a scientific evaluate of WiMAX know-how, demystifing the know-how and delivering technical recommendation on a number of approach trade-offs. a lot of the cloth is predicated at the sensible stories of the authors in development new structures. insurance comprises the IEEE 802.16 common, an educational on implementation and tips about controlling price of WiMAX community possession. this can be a needs to learn e-book for execs taken with broadband fastened instant entry.

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Extra resources for Broadband Fixed Wireless Access: A System Perspective (Signals and Communication Technology)

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This area consists of one populated zone, which is characterized by a medium-density of dwellings (houses) of up to three storeys, industrial buildings of up to two storeys, and some farmland. The receiver was located at the Engineering School building (ETSIIT), where the receiver antenna is placed in a balcony about 15 meters above street level. The transmitter was placed in four different locations at a nearby suburban area.

2 dB, 20 dB, and 20 dB, respectively. 11) Finally, following a logarithmic path loss model, the indoor propagation loss for a particular propagation path can be expressed as follows: i'I,„(^J=P4(j,„J+10alog ' d ^ + s,„, (3. 8 (for lightly obstructed environments with corridors) and 5 (for multi-floored buildings), and s^^ is a zero-mean Gaussian random variable with a standard deviation between 4 and 12 dB, describing the indoor shadowing effect [8] [9]. 3 MULTIPATH PROPAGATION Due to multipath propagation, a transmitted signal arrives at the receiver not along a single propagation path, but along multiple propagation paths, each with their own specific delay, attenuation, and phase shift, which are function of the traversed electrical path length.

2 discusses a propagation model to accurately predict outdoor-to-indoor propagation loss. 1) where d is the distance between the transmitter and the receiver, and X is the wavelength of the propagating signal. However, for most practical channels, like the BFWA radio channel, in which the region between the fransmit and receive antennas is full of objects that may reflect, diffract, or scatter the RF energy, and, in which the signal propagation takes place in the atmosphere and near the ground, the free space propagation model is not adequate to fully describe the channel's path loss behaviour.

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