CN102983873A - Control method for radio frequency system of short wave receiver - Google Patents
Control method for radio frequency system of short wave receiver Download PDFInfo
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- CN102983873A CN102983873A CN201210515701XA CN201210515701A CN102983873A CN 102983873 A CN102983873 A CN 102983873A CN 201210515701X A CN201210515701X A CN 201210515701XA CN 201210515701 A CN201210515701 A CN 201210515701A CN 102983873 A CN102983873 A CN 102983873A
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Abstract
The invention relates to a control method for a radio frequency system of a short wave receiver. A C8501F121 single chip microcomputer (SCM) is used as a control kernel, and the control over the radio frequency system is realized through adopting a time-slice-based polling mode; after entering a low-noise amplifier from an input terminal to be processed, radio frequency signals enter selective filters controlled by the SCM according to different frequency bands and then are transmitted to a frequency mixer. The method comprises the steps as follows: 1, the frequency bands of the radio frequency signals are distinguished by the SCM; 2, the SCM selects the corresponding filters according to the frequency bands of the signals; 3, the SCM controls a direct digital frequency synthesizer (DDS) to produce needed intrinsic signals. An obtained result is that the system can run 64 tasks at most, and real tameness, the reliability and the stability of the radio frequency control work are improved; the program operation amount is reduced, operations of a central processing unit (CPU) is lightened, and the data structure occupation amount of random access memory (RAM) space of the system kernel is reduced; and a control system has a simple structure and high portability.
Description
Technical field
The present invention relates to the communications electronics technical field, particularly a kind of for short-wave receiver radio system control method.
Background technology
Development along with the communications electronics technology, performance requirement to the radio frequency control technology of short-wave receiver radio system is more and more higher, only require that no longer it is satisfied with the basic task of realizing radio frequency control, and to the real-time of radio frequency control, reliability and stability are had higher requirement, in the prior art, the method that popular control system adopts usually is to realize by promoting hardware designs, hardware adaptor is proposed high requirement, thereby increased the hardware designs burden of system, because the data structure of system kernel can take a large amount of RAM spaces, the sequential operation amount also can increase the weight of the computational burden of kernel virtually, makes radio frequency control end cisco unity malfunction.
In order to guarantee work real-time, reliability and the stability of radio frequency control end, be necessary to design the simple and practical control method of a kind of kernel, in the situation of the hardware burden that does not increase system, realize the control of short-wave receiver radio system radio frequency by the timeslice polling mode, guarantee that when reducing overhead, not increasing CPU and hardware burden radio frequency control end real-time, reliability and stability improve, the report that correlation technique is not yet arranged in the domestic literature at present.
Summary of the invention
Purpose of the present invention is exactly the development need for the radio frequency control technology, a kind of method be used to being exclusively used in the control of short-wave receiver radio system is provided, in the situation of the hardware burden that does not increase system, by adopting time-based sheet polling mode to realize radio system control, improve real-time, the reliability and stability of radio frequency control end.
For achieving the above object, the technical solution used in the present invention is: be used for short-wave receiver radio system control method, take the C8051F121 single-chip microcomputer as the control kernel, the controlling mechanism of time-based sheet poll, it is characterized in that: the short-wave receiver radio system is made of single-chip microcomputer, low noise amplifier, acceptance filter, DDS frequency synthesizer and frequency mixer, and single-chip microcomputer is by universal input output pin control acceptance filter and DDS frequency synthesizer; By adopting time-based sheet polling mode to realize radio system control, after radiofrequency signal enters the low noise amplifier processing by input, distinguish different frequency range and enter by monolithic processor controlled acceptance filter, send signal to frequency mixer afterwards, the step of control method comprises:
1, single-chip microcomputer identification signal frequency range;
2, single-chip microcomputer is according to the corresponding filter of signal frequency range gating;
3, Single-chip Controlling DDS frequency synthesizer produces needed local oscillation signal.
The result who obtains: system can move maximum 64 tasks, each task has oneself independently task process storehouse, when kernel moves, the task that wait is performed is all in process stacks independently, wait for kernel calls, the task of finishing to carry out is returned corresponding task stack, and task data can not be capped loses, and guarantees the program of normally executing the task when next time is by kernel calls.
The invention has the beneficial effects as follows: realize the radio frequency controlling mechanism of a kind of practicability and effectiveness of time-based sheet poll, improve radio frequency control work real-time, reliability and stability; When improving the radio-frequency module overall performance, reduce the effect that the sequential operation amount reaches the computational burden that alleviates CPU, reduce the data structure occupancy in system kernel RAM space; Control system is simple in structure, and is portable high.
Description of drawings
Fig. 1, system hardware structure block diagram;
Fig. 2, operating system flow chart.
Embodiment
Describe in conjunction with the accompanying drawings and embodiments the present invention in detail:
The short-wave receiver radio system is made of single-chip microcomputer, low noise amplifier, acceptance filter, DDS frequency synthesizer and frequency mixer, and single-chip microcomputer is by universal input output pin control acceptance filter and DDS frequency synthesizer;
By adopting time-based sheet polling mode to realize radio system control.
Radiofrequency signal is distinguished different frequency range and is entered by monolithic processor controlled acceptance filter after entering the low noise amplifier processing by input, sends signal to frequency mixer afterwards.
Here single-chip microcomputer is selected C8051, and low noise amplifier is selected SGA4563Z, and the DDS chip is selected AD9851.
The embedded system of this timeslice polling mechanism, can move maximum 64 tasks, each task has oneself independently task process storehouse, when kernel moves, wait for that the task of being performed all in process stacks independently, waits for kernel calls, the task of finishing to carry out is returned corresponding task stack, task data can not be capped loses, and guarantees the program of normally executing the task when next time is by kernel calls, and kernel task scheduling flow chart as shown in Figure 2.
The size that is used for the timeslice of time polling tasks scheduling in the system is consistent, and the time span of timeslice can be revised.
The present invention program has following characteristics:
(a) design has realized a kind of implementation method for special-purpose short-wave receiver radio system controlling mechanism, improves rf control system work real-time, reliability and stability.
(b) control system is simple in structure, to take resource few, and is portable high.
(c) when improving the radio-frequency module overall performance, reduce the sequential operation amount and reach the computational burden that alleviates CPU, reduce the data structure occupancy in system kernel RAM space.
According to the above description, can realize the solution of the present invention in conjunction with art technology.
Claims (1)
1. one kind is used for short-wave receiver radio system control method, take the C8051F121 single-chip microcomputer as the control kernel, the controlling mechanism of time-based sheet poll, it is characterized in that: the short-wave receiver radio system is made of single-chip microcomputer, low noise amplifier, acceptance filter, DDS frequency synthesizer and frequency mixer, and single-chip microcomputer is by universal input output pin control acceptance filter and DDS frequency synthesizer; By adopting time-based sheet polling mode to realize radio system control, after radiofrequency signal enters the low noise amplifier processing by input, distinguish different frequency range and enter by monolithic processor controlled acceptance filter, send signal to frequency mixer afterwards, the step of control method comprises:
1), single-chip microcomputer identification signal frequency range;
2), single-chip microcomputer is according to the corresponding filter of signal frequency range gating;
3), Single-chip Controlling DDS frequency synthesizer produces needed local oscillation signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210515701XA CN102983873A (en) | 2012-12-05 | 2012-12-05 | Control method for radio frequency system of short wave receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210515701XA CN102983873A (en) | 2012-12-05 | 2012-12-05 | Control method for radio frequency system of short wave receiver |
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| Publication Number | Publication Date |
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| CN102983873A true CN102983873A (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210515701XA Pending CN102983873A (en) | 2012-12-05 | 2012-12-05 | Control method for radio frequency system of short wave receiver |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1439195A (en) * | 2000-06-26 | 2003-08-27 | 汤姆森许可贸易公司 | Self-adaptivve frequency band-pass filering device in microwave signal transceiver |
| CN201928271U (en) * | 2011-03-02 | 2011-08-10 | 上海大学 | Non-directional beacon receiver based on direct digital synthesis (DDS) |
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2012
- 2012-12-05 CN CN201210515701XA patent/CN102983873A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1439195A (en) * | 2000-06-26 | 2003-08-27 | 汤姆森许可贸易公司 | Self-adaptivve frequency band-pass filering device in microwave signal transceiver |
| CN201928271U (en) * | 2011-03-02 | 2011-08-10 | 上海大学 | Non-directional beacon receiver based on direct digital synthesis (DDS) |
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Application publication date: 20130320 |