38.009

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Introduction

38.009 is a multi-band digital coding system suitable for short-range communication between two stationary or mobile points. It is one of the standards used for providing multimedia services over various radio accesses. This coding system was developed by the European Telecommunications Standards Institute (ETSI). The purpose of this system is to provide multimedia applications with high transmission efficiency while maintaining low latency and low power consumption. It is used in various wireless communication systems, including satellite communications, mobile radio, cellular communication, and wireless communication for broadband Internet access.

Application Field

38.009 is used in various radio communication systems, such as Mobile Radio (GSM/GPRS/EDGE/CDMA2000), Wireless local loop (WLL) and Broadband Wireless Internet Access (BWA). It can also be used for fixed communications, such as Digital Enhanced Cordless Telecommunications (DECT) and digital radio systems. In mobile communications, 38.009 is used for voice, data, and audio/video transmissions. 38.009 can also be used in broadband communications, such as broadband radio access networks (BRANs) and broadband satellite communications (BSC). It is also used for various wireless communication systems in telemedicine and remote sensing.

Working Principle

The basic principle of 38.009 is to encode the input signal using many different codes, each with different coding parameters to provide different data rates and levels of error protection. The code parameters are determined based on the desired application and communication system. The encoded signal is then modulated and transmitted over the communication medium. The receiver decodes the received signal using the same code parameters used by the transmitter and recovers the original signal. The two main coding parameters used by 38.009 are convolutional coding rate (CCR) and channel coding rate (CR). CCR is set to determine the data rate, while CR is set to set the error protection level. The coding parameter settings can be adjusted to change the performance of the system.

Conclusion

38.009 is a multi-band digital coding system suitable for short-range communication between two stationary or mobile endpoints. It is used in various communication systems, such as Mobile Radio, Wireless local loop, Broadband Wireless Internet Access, and broadcast radio. The basic principle of 38.009 is to encode the input signal using multiple codes, modulate it, and send it over the communication medium. The receiver decodes the received signal using the same code parameters and recovers the original signal. The coding parameters of 38.009 can be adjusted to change the system performance.

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