By Dr. Joseph Shapira, Dr. Shmuel Y. Miller (auth.)
This e-book analyzes the interplay of the CDMA procedure inside a cellular channel surroundings, emphasizing repeaters, diversities, and different performance-enhancing capability. The authors offer a special and transparent description of repeater-embedded networks’ making plans, layout, and optimization in numerous situations. easy physically-based expressions are constructed and supported by way of huge box event, and supply perception into the community dynamics.
CDMA Radio with Repeaters is meant for instant RF engineers and approach architects, and for researchers engaged on complex instant networks, together with MIMO platforms. the fabric additionally offers perception for assisting mobile managers and enterprise examine expenditures and hazards. This e-book is usually compatible as a reference publication for graduate courses.
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Additional info for CDMA Radio with Repeaters
CDMA repeaters do not have the optional control on individual links, as in TDMA. Only channel or band filtering are available to this technology. The CDMA repeater is a transparent bidirectional amplifier serving users in a coverage area with the same pilot code (PN offset) as the donor sector. The users served in this area interact with the donor BTS in the same way as those connected directly to the donor, namely - they receive and respond to the same power control, access protocol and soft handoff.
2288 MHz. The modulating sequence has a periodicity of 2"^^-! (the long code). 8|LIS each, to form a signal bit at a rate of 9600 26 CDMA Radio with Repeaters bps, thus achieving a processing gain of 21 dB to the desired signal over uncorrelated signals. Reverse link - random code and power control. The long code is used on the reverse link to provide the link to the individual user. The transmission of other users is not coherently integrated by the per-user correlator in the BTS receiver, and appears as noise, well randomized by the long code.
Free-Space Optics (FSO) repeater. The RF is modulated on a laser transmission in free space between the BTS and the repeater location. FL and RF, and multiple links can be multiplexed by IF multiplexing in a single beam. FSO requires a clear line of sight, which limits its usability to fair weather and limited distances. 5 CDMA Radio with Repeaters Repeater Classification by Application Repeaters are low-cost coverage agents in the cellular network, and are candidates to replace BTSs in coverage-limited and shadowed areas for cost saving.