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WiMax (World-wide Interoperability for Microwave Access)-based vehicle-mounted radio device

A radio device and signal processing unit technology, applied to electrical components, transmission systems, etc., can solve the problems of not being suitable for the vehicle environment, small signal coverage, and easy interference of radio, so as to achieve wide signal coverage, less interference, Effects that are not easily disturbed

Inactive Publication Date: 2012-07-04
SHENZHEN HANGSHENG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing car radio devices generally send the analog FM / AM radio signal to the TUNER for processing through the FM / AM antenna, and then send the audio to the earphone or speaker for playback, which will cause the radio to be easily interfered, and the number of selected channels is limited. Its signal coverage is relatively small; even some existing network radio devices are based on PCs, but the network it transmits is an IP wired network, which is connected to the PC through the RJ45 network card interface, and then the radio server streams the audio Push it to the PC through the IP network, use the application program and audio player on the PC to decode and select the channel, and then through the D / A conversion of the sound card, the audio is sent to the speaker or earphone for playback, but it cannot be moved, and the scope of use is very popular. limited, not suitable for vehicle environment

Method used

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  • WiMax (World-wide Interoperability for Microwave Access)-based vehicle-mounted radio device
  • WiMax (World-wide Interoperability for Microwave Access)-based vehicle-mounted radio device
  • WiMax (World-wide Interoperability for Microwave Access)-based vehicle-mounted radio device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, this example provides a WiMax-based car radio device, including:

[0040] Radio signal processing unit;

[0041] a dynamic storage unit connected to the radio signal processing unit;

[0042] a display unit connected to the radio signal processing unit;

[0043] The radio signal digital-to-analog conversion unit is connected to the radio signal processing unit;

[0044] The radio output unit is connected to the radio signal processing unit through the radio signal digital-to-analog conversion unit;

[0045] The WiMax unit is connected with the radio signal processing unit through an interface unit;

[0046] Antenna unit, fixedly installed on the rear glass of the car, connected with the WiMax unit; and,

[0047] The power management unit is connected with the WiMax unit and the radio signal processing unit respectively.

[0048] Wherein, the radio signal processing unit is connected with the WiMax unit through an interface unit, and the ...

Embodiment 2

[0055] The difference from Embodiment 1 is that the radio signal processing unit adopts a CPU subunit, and the CPU subunit is connected to the WiMax unit through an interface unit to download and receive Internet radio station information.

[0056] Such as image 3 As shown, the CPU subunit has an operating system kernel, and the WiMax unit provides an internet wireless network to the CPU subunit, and under the support of the TCP / IP protocol provided by the OS, the Operating system, the application program subunit and audio playback Connect to the radio server, download the list of Internet radio stations and its information, and use the display unit to realize the selection of Internet radio stations and display related information. In this example, the radio stream media of the radio server is stored in the cache, and then decoded by the audio decoder , and then converted into an analog signal by the radio signal digital-to-analog conversion unit to realize the radio output,...

Embodiment 3

[0059] Different from Embodiment 2, the dynamic storage unit described in this embodiment adopts a DDR2 memory stick.

[0060] This example further adopts the above-mentioned technical features, and its advantage is that it can fully receive network radio information through the WiMax unit, with little interference, less distortion, and wide coverage, and realizes high-quality on-board wireless on-demand or playback broadcast audio programs. On this basis , the dynamic storage unit adopts DDR2 memory stick, which has a strong buffer capacity and smoother audio, which can not only meet the dynamic buffer requirements of the car radio under high-speed operation, but also meet the requirements of vibration characteristics.

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PUM

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Abstract

The invention provides a WiMax (World-wide Interoperability for Microwave Access)-based vehicle-mounted radio device, which comprises a radio signal processing unit, a dynamic storage unit, a display unit, a radio signal digital-to-analog conversion unit, a radio output unit, a WiMax unit, an antenna unit and a power management unit, wherein the dynamic storage unit is connected with the radio signal processing unit; the display unit is connected with the radio signal processing unit; the radio signal digital-to-analog conversion unit is connected with the radio signal processing unit; the radio output unit is connected with the radio signal processing unit through the radio signal digital-to-analog conversion unit; the WiMax unit is connected with the radio signal processing unit through an interface unit; the antenna unit is fixedly arranged on automobile rear window and is connected with the WiMax unit; the power management unit is connected with the WiMax unit and the radio signal processing unit respectively, so that network radio information can be completely received through the WiMax unit; the WiMax-based vehicle-mounted radio device has low interference, low distortion and wide coverage area; and high-quality vehicle-mounted wireless broadcasting on demand and playback of a broadcast audio program are realized.

Description

technical field [0001] The invention relates to a car radio device, in particular to a WiMax-based car radio device. Background technique [0002] The existing car radio devices generally send the analog FM / AM radio signal to the TUNER for processing through the FM / AM antenna, and then send the audio to the earphone or speaker for playback, which will cause the radio to be easily interfered, and the number of selected channels is limited. Its signal coverage is relatively small; even some existing network radio devices are based on PCs, but the network it transmits is an IP wired network, which is connected to the PC through the RJ45 network card interface, and then the radio server streams the audio Push it to the PC through the IP network, use the application program and audio player on the PC to decode and select the channel, and then through the D / A conversion of the sound card, the audio is sent to the speaker or earphone for playback, but it cannot be moved, and the sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/08
Inventor 何照丹唐金涛
Owner SHENZHEN HANGSHENG ELECTRONICS