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Baseband algorithm modulation and demodulation system based on fpga

A technology of modulation and demodulation, double transmission and double reception, applied in the direction of modulated carrier system, transmission system, multi-frequency code system, etc., can solve the problems of radio interference and difficulty in reality, reduce the probability of deep fading, and improve the receiving sensitivity Effect

Active Publication Date: 2021-12-31
TONG FANG ELECTRONICS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you want to overcome this deep fading by increasing the transmission power, increasing the size and height of the antenna, it is not easy to realize in many application scenarios, and it will cause interference to other stations

Method used

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  • Baseband algorithm modulation and demodulation system based on fpga
  • Baseband algorithm modulation and demodulation system based on fpga
  • Baseband algorithm modulation and demodulation system based on fpga

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0054] Such as Figure 1-4 As shown, the FPGA-based baseband algorithm modulation and demodulation system of dual transmission and dual reception according to an embodiment of the present invention includes a MAC module 1, and also includes

[0055] The baseband acquisition module 2 is connected with the MAC module 1 and external dual antennas, and is used for dual antenna diversity reception of two input I / Q signals carrying the same message, and filtering and frequency offset of one of the ...

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Abstract

The invention discloses a baseband algorithm modulation and demodulation system based on FPGA with dual transmission and double reception, including a MAC module, a baseband capture module, a baseband reception module and a baseband transmission module, and a baseband algorithm modulation and demodulation system based on FPGA with dual transmission and double reception. Adopt dual-antenna diversity transmission, and then receive dual-antenna diversity reception at the receiving end, that is, receive signals carrying the same message with little correlation on the two receiving branches, and then combine and output the signals of the two branches through combining technology to realize The probability of deep fading is greatly reduced on the receiving terminal to obtain diversity gain, thus greatly improving the receiving sensitivity.

Description

technical field [0001] The present invention relates to the technical field related to mobile communication, in particular, relates to a baseband algorithm modulation and demodulation system based on FPGA with dual transmission and dual reception. Background technique [0002] At present, digital modulation refers to the technology that uses 0 and 1 of the digital baseband signal to control a certain parameter in the sinusoidal carrier, and then transmits and processes all information through some equipment. In mobile communication, the fading effect is one of the main factors affecting the communication quality. The fast fading depth can reach 30~40dB. If you want to overcome this deep fading by increasing the transmit power, increasing the size and height of the antenna, it is not easy to realize in many application scenarios, and it will cause interference to other radio stations. [0003] Aiming at the problems in the related technologies, no effective solution has bee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L27/00H04L1/00H04B7/08
CPCH04B7/0854H04B7/0868H04L1/004H04L1/0071H04L27/0014H04L27/2659H04L27/266H04L27/2695H04L2027/003
Inventor 程敏杰邓军徐思武
Owner TONG FANG ELECTRONICS SCI & TECH