Timing and carrier recovery device for wireless transmission system and recovery method

A technology of wireless transmission and carrier recovery, applied in transmission systems, digital transmission systems, synchronization devices, etc.

Inactive Publication Date: 2010-06-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, coherent demodulation requires carrier recovery. A large number of literatures have studied th...

Method used

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  • Timing and carrier recovery device for wireless transmission system and recovery method
  • Timing and carrier recovery device for wireless transmission system and recovery method
  • Timing and carrier recovery device for wireless transmission system and recovery method

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Embodiment

[0044] A timing and carrier recovery device for a wireless transmission system, comprising a receiving device 1 of the wireless transmission system, a computer 3 and a development board 2, the receiving device 1 of the wireless transmission system is connected with the development board 2 and the computer 3, and the development board 2 is Sundance's circuit board with an FPGA chip and programmed through software.

[0045] A timing and carrier recovery method for a wireless transmission system, which uses System generator software to build a module, automatically generates a program in Verilog language, and writes the program into an FPGA chip of a development board; the timing and carrier recovery method comprises the following steps:

[0046] 1) The receiver of the wireless transmission system receives the data signal, and after 32 times of downsampling, the sampling value at 4 times the symbol rate is obtained;

[0047] 2) The interpolation filter performs interpolation oper...

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Abstract

The invention relates to a timing and carrier recovery device for a wireless transmission system and a recovery method, which belong to the technical field of wireless communication. The device comprises a receiver of a wireless transmission system, a computer and a development board, the receiver of the wireless transmission system and the development board are connected with the computer, wherein the development board is a circuit board with an FPGA chip with a program written in through software. The recovery method comprises the following steps: constructing a module, generating a program, and writing the program into the development board; receiving a data signal through the receiver, and sampling under the 32-time condition to obtain a sampled value at a four-time symbol rate; interpolating the sampled value to obtain a timing error in reception of the data signal; low-pass filtering the timing error; obtaining a sampling control signal and an interpolation control signal through a clock control unit; and controlling an interpolation filter through the interpolation control signal, recovering the frequency deviation under the control of the sampling clock control signal, and repeating the recovery steps to realize the continuous recovery of the bit timing error and the frequency deviation.

Description

technical field [0001] The invention relates to a timing and carrier recovery device and a recovery method for a wireless transmission system, belonging to the technical field of wireless communication. Background technique [0002] In the modern communication system, the wireless communication method has been paid more and more attention by people. With the development of communication technology, higher and higher requirements are put forward for the channel capacity, spectrum utilization, reliability and real-time performance of communication. The use of MIMO channels can double the wireless channel capacity, without increasing the bandwidth and antenna transmission. In the case of high power, the spectrum utilization rate can be doubled, and the reliability of the channel can be improved at the same time, and the bit error rate can be reduced. Therefore, the MIMO system and its related technologies have become a research hotspot in recent years. [0003] The test and v...

Claims

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Application Information

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IPC IPC(8): H04L7/033H04L25/03H04L1/06
Inventor 孙健王凤菊袁东风贾会超岑楠刘朝娜徐超王恒
Owner SHANDONG UNIV
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