The integration of the hottest 3G technology does

2022-09-22
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The integration of 3G technology does not develop linearly

although intelligent and multimedia mobile devices that combine Bluetooth, Wi Fi and auxiliary GPS technology have emerged, the third generation with many new connection technologies and applications has not yet entered people's vision. These new connection technologies and applications generally include FM radio, digital TV reception, wireless ultra wideband and other rich and colorful functions

if basic mathematics is used to simulate the integration process of these new connection technologies, people may tend to regard it as a simple addition. Unfortunately, this process is not so simple (or continuous). It is closer to the solution of calculus and differential equations. The factor that complicates this problem is the expected usage pattern

the key is that multiple tasks and applications may coexist. In this coexistence (which can be defined as running multiple technologies or applications at the same time), only a 3G will pose several difficult challenges. Moreover, the coexistence will also cause such a problem, that is, whether software radio (SDR) or cognitive radio itself can work with multi-functional DSP and RF processors required by 3G, multimedia and other higher-level products

the core of solving the coexistence problem is to be able to perform voice and data communication while dealing with other application intensive tasks

in order to meet the above requirements, the basic architecture of the platform will be different from the mainstream architecture of 2G and 2.5G. The latter is a chipset based on single processor (sometimes dual processor), which usually has limited support for processing intensive applications and multitasking, and the support for parallel processing is very limited or does not exist at all. With the emergence of 3G based on multi-function architecture with multi processors, consumers' preference for the significantly expanded functions of mobile devices will change their use mode. More applications will be loaded on these devices. Consumers will have a need for parallel processing because they will quickly adapt to multiple applications launched at the same time. At the same time, they hope that the simplicity of product use and service quality will not be discounted

multiple independent processing engines will become the characteristics of 3G architecture. These engines can operate at the same time, and the working level of each engine varies according to the processing requirements of active applications. In this kind of multi-functional architecture, a processor is a main processing unit, which manages the execution of multiple parallel tasks, including synchronous voice and data processing and multimedia applications such as high-resolution pictures, video streaming and stereo

Shifting paradigm? Transfer paradigm

five years from now, the usage mode will run multiple applications at the same time. For example, these applications may be voice (a call between two users) and audio (background MP3 or FM) channels on Bluetooth, as well as images (retrieval and transmission of GPS maps, used to establish the coordinate system of the venue) and data (Internet access, list sharing). This requires at least five radio broadcast devices - FM broadcast receivers, Bluetooth/wireless UWB technology, Wi Fi, 3G cellular and auxiliary GPS - each with its own air interface and a coordination center controller that combines all devices

the existence of multiple wireless transceiver devices in handheld devices has caused key RF related to antenna implementation and mutual interference. The owner of a children's clothing store informed the problem. Other types of systems, such as Wi Fi access points and laptops, show that two antennas can significantly improve RF performance, although it will increase the complexity and cost of the system. Based on the possibility of five or more RF subsystems, 3G may require more than one antenna, which will be shared by several wireless receiving devices. This will make 4 Cable: 5 feet, 15 feet, 25 feet, 50 feet, 100 feet, 2 meters, 5 meters, 10 meters, 15 meters, 30 meters or self-determined length. Some "smart antenna" technologies, such as interference cancellation of single or multiple antennas, multiple input/multiple output (MIMO) antennas and DSP Technology, may be applied in 3G

so far, some success has been achieved in reducing mutual interference through careful handling of RF design and integration practices and the implementation of a main processing unit to coordinate the work of each RF subsystem. However, in 3G, multiple wireless receiving devices and antennas will significantly increase the complexity that must be solved. With the passage of time, improving the requirements of RF integration at the chip level will push the above problems to semiconductor designers, thus reducing the challenges faced by system designers. Because antenna design is closely related to RF management, the future "smart" RF solutions will cover every aspect of this problem

a belief held by the wireless industry for a long time shows that the key to wireless technology is to develop mature software radio, including some cognitive radio capabilities. Some people believe that SDR will emerge in the 3G era. Many unscrupulous vendors in the current market are using price war to win customers. It is generally believed that the "super radio transceiver" with programmable architecture can detect multiple RF air interfaces in the environment and switch to the required best interface in time within a specific period of time. This interface is often popularly called the "always best connection" (ABC) interface

wireless technology experts and system developers insist on pursuing the new SDR dream because they believe that it can simplify the architecture and reduce the related costs through an architecture that can support multiple discrete air interfaces. Unfortunately, supporters of SDR are striving to unify various air interfaces to produce a single ABC interface. At present, the wireless industry is undergoing a paradigm shift, whereby 3G will require multiple radio devices to work in parallel. Therefore, a single ABC air interface is not enough. Of course, it is conceivable that there is an improved SDR that can indeed support multiple parallel air interfaces, but this will make the already complex research more complex

along this route, people will finally try to extend the logic of software radio to the whole 3G, that is, the architecture of can be reconfigured to such an extent that it will be similar to a kind of software (SDH). Therefore, since SDR can support all air interfaces, SDH can also support SDR and all application processing elements, which are required to provide services for the expected 3G multi radio transceiver and multi application situations. Although this is an interesting concept, it will increase the same parallel complexity, and therefore it may be more complex than SDR. (end)

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