Realize software-defined radio design

Software Defined Radio (SDR) is a radio broadcast communication technology based on a software-defined wireless communication protocol rather than hardwired. Bands, air interface protocols, and features can be upgraded through software downloads and updates without having to completely replace the hardware. In addition to traditional communication equipment, SDR is also used in other fields, such as defense electronics, including handheld or piggyback radios, electronic station equipment and radar. And it can also be applied to test equipment, mainly RF test equipment and communication telemetry equipment. Wireless video surveillance and data transmission are also mainstream applications.

At present, due to the coexistence of multiple wireless communication standards, multi-band and multi-standard are a hard requirement for the majority of equipment manufacturers. However, there has not been a good general hardware platform to support. At this time, it is necessary to design a separate hardware platform for different frequency bands and formats. However, this is time consuming and laborious, and the system BOM and maintenance cost are high. ADI's Asian communications strategy market understands that the software radio products on the market are not well suited to the development needs of today's communications industry. One of the solutions is based on a separate RF device. It requires an external IF filter and can only be designed for a specific frequency band and system. It cannot be a general-purpose platform. The other solution is similar to the AD936x. Transceiver, but its band coverage and signal bandwidth are very narrow, and performance indicators can not meet the requirements of many wireless standards.

Realize software-defined radio design

Mr. Jie is currently the Communications Marketing Manager for Analog Devices in Asia, responsible for the marketing and new business development of ADI's communications infrastructure business in Asia. Mr. Jie has more than 10 years of experience in the communications industry and has a deep understanding of the wireless communications market and technology trends.

In response to this problem, ADI has introduced an innovative Sigma Delta ADC-based zero-IF architecture, ultra-wideband synthesis, and high performance with built-in system-level calibration design through long-term technical research and accumulation in the RF and IF fields. A low-power, fully integrated RF transceiver that solves the bottlenecks of previous solutions and enables true software-defined radio products. Device manufacturers can use a hardware platform to cover almost all frequency bands and formats, just by modifying the software, and truly realize the system design of the software-defined radio architecture.

ADI's new AD9361 wireless transceiver analog front end for wireless communication systems is a true software radio product. The AD9361 is a high performance, highly integrated RF Agile TransceiverTM agile transceiver. The device's programmability and wideband capabilities make it ideal for a wide range of transceiver applications. The device combines an RF front-end with a flexible mixed-signal baseband section that integrates a frequency synthesizer to provide a configurable digital interface to the processor, simplifying design entry. The device can be used in the design of micro base stations such as small cell/Femtocell, which is easy to install and debug for factory automation.

For the complex field and specific conditions of industrial applications, high temperature, high reliability, and devices that require isolation also require more new technologies to support. ADI's products for intelligent factories In the industrial networking field, ADI can provide chips from 4~20mA, RS-232, RS-485, CAN, LVDS and other industrial communication protocols, which can support isolated and non-isolated, industrial temperature. Scope, including DC-DC isolated power supply technology; also supports short-range wireless communication technology, providing high-performance RF chips covering different frequency bands; and for industrial Ethernet technology, ADI is also considered in new processors .

In the future, SDR will evolve and evolve toward higher frequency bands, wider bandwidth, and more antennas and lower power consumption, such as 5G technology based on large-scale antenna arrays. The manager said that in the future, ADI will gain insight into market developments and trends, and actively deploy future products and system solutions, including wider bandwidth and higher integration RF transceivers, direct RF sampling data converter technology, microwave and higher. Signal chain integration scheme for frequency bands, etc.
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With the improvement of consumption level,more and more computer users and game players to computer peripherals comfort and quality put forward higher request. Once as a high-end peripherals products mechanical keyboard are no longer the exclusive of enthusiasts.


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Compared with the Wireless Gaming Keyboard,the mechanical keyboard hasthese advantages.Mechanical keyboard is the most important axis,mechanical keyboard than ordinary film keyboard long life,a good mechanical keyboard life of more than 10 or even 20 years.After the use of mechanical keyboard for a long time,the feel of the key changes very little,but the film can not achieve.Machinery has a different feel of different axis of the keyboard,thin film is a single touch.Mechanical keyboard can no rush,do 6 key part mechanical keyboard can all key without conflict,and more than 3 key conflict-free membrane keyboard less (therefore very suitable for the game,most professional electric campaign player will use the mechanical keyboard) to improve the level.5.You can change your own key cap, convenient personalized DIY.



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