What Are Wireless Telecommunications?

Wireless communication supporting products mainly include GPRS / CDMA / GSM DTU (data transmission terminal) MODEM, short message sending equipment, mobile fax machine, etc.

Wireless communication

The programming of wireless data acquisition can be seen from the basic principles of wireless communication. Wireless data acquisition and transmission mainly includes the following processes, from sensors with processors or ... This course will be aimed at engaging in wireless communication product development and related The technical staff of the project introduced the EMC technical specifications of the spread spectrum wireless communication products, the basic principles of EMC, and the detection and removal of EMC.

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Through analysis and investigation, we have adopted wireless spread spectrum technology as the basic means of communication for mobile banking vehicles, with telephone dialing as a backup, and achieved good results in practical applications. First, the basic principle of wireless spread spectrum technology Wireless spread spectrum technology is a type of wireless communication, mainly used in wireless local area networks. The research and application of spread spectrum technology originated from the military.

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Synchronization technology is a classical subject of digital communication. The design of a synchronizer is generally a process. The exact performance analysis is generally very difficult, so most of them focus on rough analysis and simulation. In the paper B-3, we use the random approximation rule to propose a recursive maximum likelihood estimation method as a synchronization algorithm for joint carrier phase and symbol timing recovery, and verify its performance with simulation. This includes its accurate convergence and fast convergence, and it is suitable for real time applications.

We further use the Lyapunov stability theory in the system theory and the Martingale theory in the random program to prove that the synchronization algorithm converges to the correct value with a probability of 1 and its convergence rate is progressively lower than the Cramer-Rao lower limit, which is progressive Best convergence rate.