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TDMA radio-frequency signal collection quantification method and system

A radio frequency signal, sampling and quantization technology, applied in the field of TDMA radio frequency, to achieve the effect of reducing the number of quantization bits, saving signal transmission resources, and reducing the number of quantization bits

Active Publication Date: 2013-09-04
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology

As a result, the power margin of the actual signal superimposed above the threshold may reach 50-70dB

Method used

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  • TDMA radio-frequency signal collection quantification method and system
  • TDMA radio-frequency signal collection quantification method and system
  • TDMA radio-frequency signal collection quantification method and system

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Embodiment

[0061] Figure 4 It is a schematic diagram of different fading hierarchical quantization levels relative to the speed of the TDMA signal frame according to the method of the present invention, specifically:

[0062] S1: C / I requirement of TDMA signal, which is the basic requirement under the premise of no fading and additional external interference;

[0063] S2: The fast fading level fluctuation range usually expressed by the industry;

[0064] S3: The slow fading level fluctuation range usually expressed by the industry;

[0065] S2f: The range of level fluctuations that is relatively fast compared with the TDMA frame rate in the fast fading generally expressed by the industry;

[0066] S2l: The slow level fluctuation range compared with the TDMA frame rate in the fast fading generally expressed by the industry.

[0067] Figure 4 A method for sampling and quantizing TDMA radio frequency signals is described. The processed signal is a TDMA (or TDM) radio frequency signal ...

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Abstract

The invention provides a TDMA radio-frequency signal collection quantification method and system. The TDMA radio-frequency signal collection quantification method includes the following steps. Firstly, a received signal undergoes quantitative layering and then sampling. Each sampled signal is quantified to be Sfn and undergoes signal processing at last. The TDMA radio-frequency signal collection quantification system comprises a quantitative layering module, a sampling module, a sampled signal quantifying module, a transmitting module and an information restoring sampling module. The TDMA radio-frequency signal collection quantification method and system quantify a fast-changing signal and a slow-fading envelope signal respectively, greatly reduce the quantization bit number of a high-speed ADC at the rear end, lower requirements in selecting hardware and reduce cost. Meanwhile, hardware requirements of FPGA, DSP and the like are lowered due to the reduced digital quantization bit number, processing speed is improved and signal transmitting resources are greatly saved.

Description

technical field [0001] The invention relates to the technical field of TDMA radio frequency, in particular to a method and system for sampling and quantizing a TDMA radio frequency signal. Background technique [0002] For TDMA (Time Division Multiple Access, Time Division Multiple Access) communication systems, including GSM (Global System for Mobile Communications, Global System for Mobile Communications), DCS (Digital Cellular System, Digital Cellular System), JDC (Japan Digital Cellular Mobile Communication System ), IS-54, TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) and so on. Its radio frequency signal is defined by TDMA frame, and each TDMA frame includes multiple time slots. In order not to lose the generality, the following technical description will be made with the GSM system. [0003] For a GSM signal, the envelope change of its radio frequency signal is based on the TDMA frame and its time slot. The TDMA frame of each GSM carrier contai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/30H03M1/54
Inventor 胡应添
Owner COMBA TELECOM SYST CHINA LTD
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