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FPGA-based double-receiving and double-transmitting type baseband algorithm modulation and demodulation system

A modulation and demodulation, dual-transmit and dual-receive technology, applied in modulation carrier systems, transmission systems, multi-frequency code systems, etc., can solve problems such as difficult reality and radio interference, reduce the probability of deep fading, and improve receiving sensitivity. Effect

Active Publication Date: 2019-04-19
TONG FANG ELECTRONICS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • FPGA-based double-receiving and double-transmitting type baseband algorithm modulation and demodulation system
  • FPGA-based double-receiving and double-transmitting type baseband algorithm modulation and demodulation system
  • FPGA-based double-receiving and double-transmitting type baseband algorithm modulation and demodulation system

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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 an FPGA-based double-receiving and double-transmitting type baseband algorithm modulation and demodulation system, comprising an MAC module, a baseband capture module, a baseband receiving module and a baseband transmitting module. The FPGA-based double-receiving and double-transmitting type baseband algorithm modulation and demodulation system adopts a double-antenna diversity transmitting mode and adopts a double-antenna diversity receiving mode at a receiving end, that is, receives signals having very small pertinence and carrying the same message on two receiving branches, and then merges the two branch signals via the merging technology for output, and the probability of deep fading on the receiving terminal is greatly reduced to obtain a diversity gain, thereby 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 Applications(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