By Y. Jay Guo
An engineer with a protracted heritage in radio communications, and now with a British corporation, Guo surveys the applied sciences for advancements in cellular radio entry networks from the viewpoint of approach engineering, focusing regularly on high-level architectural concerns. He highlights the benefits of complicated applied sciences, but in addition discusses significant theoretical and functional difficulties that they elevate for process designers. between his subject matters are linear transmitters, superconducting filters and cryogenic radio frequency entrance head, radio over fiber, software program radio base stations, cellular terminal positioning, and excessive- velocity downlink packet entry.
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Additional info for Advances in Mobile Radio Access Networks
1 Rating of Different Components for Software Radio Evaluation Category ASIC FPGA DSP Programmability 1 4 5 Integration 2 5 5 Development cycle 5 1 3 Performance 5 4 3 Power efficiency 5 2 3 Since DSPs and GPPs have the highest programmability, the ultimate approach to a software radio base station could be to implement all the functionalities in the software and use DSPs and GPPs as the hardware platform. 6 shows a software radio base station for WCDMA that was presented by PA Consulting, a British company based in Cambridgeshire, in 2003 .
For mobile terminals in active transmission, no additional signal is needed for location determination. The Uplink TDOA technique locates the UE using the energy associated with the existing bearer and control at the normal power level. No power-up at the terminal is needed due to the long integration time. For mobile terminals in the idle mode, the transmission needed for U-TDOA is no more than the normal subscriber traffic and for a much shorter period of time (100–500 ms). In fact, when accessing the network, the mobile terminal normally uses higher power.
At that time, a typical radio consisted of about 80% hardware and 20% software. Mitola suggested that a software radio should have the opposite hardware and software composition, with more software content than hardware content. Generally speaking, software radio refers to radio transceivers whose functionalities are largely defined and implemented by software, and therefore they can be reprogrammed to accommodate various physical layer formats and protocols without replacing the hardware. An ideal software radio should have two distinct features: software upgradability and hardware reconfigurability.
Advances in Mobile Radio Access Networks by Y. Jay Guo