By Dr. Joseph Shapira, Dr. Shmuel Y. Miller (auth.)
This ebook analyzes the interplay of the CDMA method inside a cellular channel surroundings, emphasizing repeaters, diversities, and different performance-enhancing capacity. The authors supply a distinct and transparent description of repeater-embedded networks’ making plans, layout, and optimization in numerous eventualities. basic physically-based expressions are built and supported via large box adventure, and supply perception into the community dynamics.
CDMA Radio with Repeaters is meant for instant RF engineers and procedure architects, and for researchers engaged on complex instant networks, together with MIMO platforms. the fabric additionally presents perception for supporting mobile managers and enterprise verify charges and hazards. This e-book is usually compatible as a reference publication for graduate courses.
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Extra resources for CDMA Radio with Repeaters
1 Reverse Link Power Control The capacity of the CDMA cellular system is interference limited by transmissions of other users in the cell and others in adjacent cells. The transmission power of each ST is controlled to minimize this interference and maximize the capacity. The control parameter is the error rate in the link, measured per frame in the CDMA system (FER - Frame Error Rate) that has to be kept under a level commensurate with the service. The allowed FER for voice is 1%. The FER is mostly influenced by the received £//;, which depends on the level of transmitted power.
Balance of the FL and RL gain in the repeater is required for maintaining the link balance in the coverage area. A change in the FL gain changes the pilot level in the repeater area, while the traffic level is controlled by end-toend power control, so that the ratio between the pilot level and that of the traffic changes, impairing the link balance. 2 Impact of Repeaters on the CDMA Network A CDMA network employing integrated remote radio access techniques can generally achieve improved coverage performance in terms of range extension, radio hole coverage, and link and load control.
Incorporation of repeaters in the CDMA network does not require large scale replanning as with narrow band systems, but local parameter tuning. 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.
CDMA Radio with Repeaters by Dr. Joseph Shapira, Dr. Shmuel Y. Miller (auth.)