CN114338326B - Wireless communication processing method and device - Google Patents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a wireless communication processing method and a device, which are applied to a signal transmitting end, and effectively solve the problems that the conventional processing modes such as modulation and demodulation, coding and decoding, forward error correction coding and decoding and the like are only adopted in the existing wireless communication waveform.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a wireless communication processing method and device.
Background
Wireless communication (english: wireless communication) is a long-distance transmission communication between a plurality of nodes without transmission via conductors or cables, and can be performed by radio, or the like. Wireless communications include a variety of fixed, mobile, and portable applications such as two-way radios, cellular telephones, personal digital assistants, and wireless networks. Examples of other wireless radios are GPS, garage door remote control, wireless mouse, etc. Most wireless communication technologies will use radio, including WIFI, which is only a few meters away, and also including deep space networks, which communicate with the voyage home No. 1, over millions of kilometers away. However, some wireless communication technologies do not use radio, but use other electromagnetic wave wireless technologies, such as light, magnetic fields, electric fields, etc.
At present, the conventional processing modes such as modulation and demodulation, coding and decoding, forward error correction coding and decoding and the like are only adopted in the existing wireless communication waveform, so that the problems of signal stability and wireless signal receiving and transmitting quality can not be ensured when the current wireless signal is received and transmitted, and meanwhile, the modulation and demodulation modes can not be adjusted in a self-adaptive manner under the condition of communication channel variation, and the error rate of received data can be greatly increased, so that the signal receiving and transmitting quality is reduced.
Disclosure of Invention
Based on this, the present invention aims to provide a wireless communication processing method and device, so as to fundamentally solve the problem that the receiving and transmitting quality of wireless signals is low and the modulation and demodulation pattern cannot be adaptively adjusted.
The method provided by the embodiment of the invention is applied to the signal sending end, and comprises the following steps:
the method comprises the steps that a sending end generates random binary data as a source, and signal modulation is carried out on the source to determine a modulation signal;
the transmitting end carries out inverse fast Fourier transform modulation on the modulation signal and a preset pilot frequency sequence to obtain a target signal after the inverse fast Fourier transform modulation, and the target signal after the inverse fast Fourier transform modulation is transmitted to the receiving end through a channel;
and after the receiving end receives the target signal, estimating and balancing the channel according to the target signal and a preset pilot frequency sequence, and analyzing the received target signal to obtain an information sink corresponding to the information source.
Further, the step before the signal modulation is performed on the signal source further includes:
and performing convolutional coding and interleaving treatment on the information source when the information source is sent out.
Further, the step after the signal modulation is performed on the signal source includes:
and carrying out FFT demodulation processing on the received target signal.
Further, the step of estimating and equalizing the channel according to the target signal and the preset pilot sequence specifically includes:
and multiplying the target signal with the preset pilot frequency sequence to obtain a channel estimation parameter.
Further, the step of calculating the preset pilot sequence and the channel estimation parameter to achieve channel equalization specifically includes:
and solving the inverse of the channel estimation parameter to obtain a second target signal, and multiplying the preset pilot sequence with the second target signal to achieve channel equalization.
Further, according to the wireless signal strength between the transmitting end and the receiving end, the step of adaptively adjusting the modulation efficiency includes:
when the channel frequency response between the transmitting end and the receiving end is low, adopting a low-efficiency modulation mode to carry out modulation processing;
when the channel frequency response between the transmitting end and the receiving end is high, a high-efficiency modulation mode is adopted for modulation processing.
The wireless communication processing device according to the embodiment of the invention is applied to a wireless communication transmitting end and a receiving end, and comprises:
the signal modulation module is used for carrying out inverse fast Fourier transform modulation on the modulation signal and a preset pilot frequency sequence to obtain a target signal after the inverse fast Fourier transform modulation;
the signal transmitting module is used for transmitting the target signal subjected to the inverse fast Fourier transform modulation to the receiving end through a channel;
the receiving end comprises:
the signal receiving module is used for receiving the target signal after the inverse fast Fourier transform modulation;
and the channel modulation module is used for carrying out estimation and equalization processing on a channel according to a target signal and a preset pilot frequency sequence, and analyzing the received target signal to obtain a signal sink corresponding to the signal source.
Compared with the prior art: the invention provides a wireless communication processing method, which effectively solves the problems that the conventional processing modes such as modulation and demodulation, coding and decoding, forward error correction coding and decoding and the like are only adopted in the existing wireless communication waveform.
Drawings
Fig. 1 is a flowchart of a wireless communication processing method in a first embodiment of the present invention;
fig. 2 is a flowchart of a wireless communication processing method in a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a wireless communication processing apparatus according to a third embodiment of the present invention;
fig. 4 is a flowchart of a channel estimation process in a second embodiment of the present invention.
The following detailed description will further illustrate the invention with reference to the above-described drawings.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1, a wireless communication processing method according to a first embodiment of the present invention is shown, and the method specifically includes steps S01-S03 when applied to a signal transmitting terminal.
In step S01, the transmitting end generates random binary data as a source, and performs signal modulation on the source to determine a modulated signal.
In the specific implementation, a sending signal is generated through a wake-up signal sending end, random binary data which accords with the current signal is found to be used as a sending signal source, preset signal modulation processing is carried out on the current sending signal source, and the current processing signal data is determined to be a modulation signal.
And step S02, performing inverse fast Fourier transform modulation on the modulation signal and a preset pilot frequency sequence through the transmitting end to obtain an object signal subjected to inverse fast Fourier transform modulation, and transmitting the object signal subjected to inverse fast Fourier transform modulation to the receiving end through a channel.
Wherein the preset pilot sequence adopts training data as PN sequence, when in specific implementation, the modulating signal obtained in step S01 and PN sequence are subjected to IFFT (inverse fast Fourier transform) modulation, the signal is transformed into a plurality of parallel subcarrier data streams (total 64 subcarriers in the signal, wherein 52 subcarriers are used for carrying modulating data, four subcarriers are used as pilot carriers, eight subcarriers are used as guard bands) by IFFT processing, thus obtaining a modulated target signal, then Cyclic Prefix is inserted into the target signal and parallel-serial conversion is carried out, then the signal is sent to a receiving end through a channel for subsequent signal processing (Cyclic Prefix (CP) is formed by copying the signal at the tail of OFDM symbols to the head, when the spectrum bandwidth of the OFDM for transmitting the signal is wide, unless the subcarriers are large, in order to eliminate inter-symbol interference (ISI) as much as possible, a guard interval is added before an information symbol and the guard interval time width is made larger than the estimated delay spread in the channel, if the guard interval is left-hand, orthogonality between sub-carriers is no longer present, thus generating inter-carrier interference (ICI), to eliminate ISI and ICI, OFDM symbol Cyclic extension forms a guard interval, orthogonality between sub-carriers can be protected as long as the delay spread of a symbol always has an integer multiple of samples in the interval, a guard interval is formed as long as the delay spread of a symbol always has an integer multiple of samples in the interval, orthogonality between subcarriers can be preserved).
And S03, after the receiving end receives the target signal, estimating and equalizing the channel according to the target signal and a preset pilot frequency sequence, and analyzing the received target signal to obtain a signal sink corresponding to the signal source.
In a specific implementation, the receiving end is awakened to receive the target signal in step S02, channel estimation is made on the channel frequency response according to the correlation between the received signal and the transmitted signal, then the channel estimation data is multiplied with the target signal to achieve the purpose of channel equalization, then the equalized signal is subjected to FFT (fast fourier transform) demodulation processing, and then the signal after FFT demodulation is subjected to parallel-serial conversion, deinterleaving and VB decoding processing twice to obtain the sink corresponding to the source.
In summary, the wireless communication processing method in the above embodiment well solves the problem that the conventional processing modes such as modulation and demodulation, coding and decoding, forward error correction coding and decoding and the like are only adopted in the existing wireless communication waveform, and meanwhile, the mode is well used for general and binary signal processing, so that the application range of the invention and the reliability of signals in channel transmission are improved, the influence of burst errors on the signal transmission is well resisted, and meanwhile, the processing modes of channel estimation and channel equalization are inserted in the process of receiving signals, and the estimation and equalization calculation are carried out on the channel frequency response according to the correlation between the received signals and the transmitted signals, so that the stability of the signals in the process of receiving and transmitting can be improved, and the purpose of improving the signal receiving and transmitting quality is achieved.
Example two
Referring to fig. 2, a wireless communication processing method according to a second embodiment of the present invention is applied to a signal transmitting terminal, and the method specifically includes steps S11-S18.
Step S11, the transmitting end generates random binary data as a signal source, and carries out signal modulation on the signal source to determine a modulation signal.
And step S12, performing convolutional coding and interleaving processing on the information source when the information source is sent out.
In a specific implementation, after the transmitting end generates random binary data as a signal source in the step S11, convolutional encoding and interleaving are performed on the signal source respectively, wherein the purpose of convolutional encoding is to reduce the bit error rate of a system and improve the reliability of signals in channel transmission, and the purpose of interleaving is to disturb the original signal transmission sequence according to a certain rule, and when the disturbed signals pass through a channel with burst errors, a series of signal error responses are generated, which are random in the original data, so that the influence of burst errors on signal transmission can be well resisted.
And S13, performing inverse fast Fourier transform modulation on the modulation signal and a preset pilot frequency sequence through the transmitting end to obtain an inverse fast Fourier transform modulated target signal, and transmitting the inverse fast Fourier transform modulated target signal to the receiving end through a channel.
And step S14, performing FFT demodulation processing on the received target signal.
In the implementation, before performing FFT demodulation processing on the received target signal, serial-parallel conversion is performed on the current target signal, and after removing the cyclic prefix doped by the transmitting end during signal processing, the current FFT demodulation processing is performed, which is also fast fourier transform demodulation processing, where FFT is to convert multiple parallel subcarrier data streams into serial data streams, so that subsequent data arrangement is facilitated.
And S15, multiplying the target signal by the preset pilot frequency sequence to obtain a channel estimation parameter.
In the implementation, the obtained target signal is multiplied by the PN sequence generated by the PN sequence generator to directly obtain the current channel estimation parameter, and the step adopts a relatively simple least square method, namely LS algorithm, so that the condition that the signal is lost in frame due to the influence of factors such as environment in the signal receiving and transmitting process can be effectively reduced, and the signal transmission stability is improved (as shown in figure 4 of the specification).
And S16, performing inverse calculation on the channel estimation parameters to obtain a second target signal, and multiplying the preset pilot sequence by the second target signal to achieve channel equalization.
Further, in combination with step S15 (fig. 4 of the specification), in1 is a received signal input port, in2 is a PN sequence separated by a carrier demodulation module, the first multiplication module realizes comparison between the received PN sequence and an original sequence, and the second multiplication module realizes multiplication of a signal and a channel response parameter, wherein, a training sequence generated by a PN sequence generator is required to be consistent with a training sequence inserted in the front, that is, a frequency generation polynomial parameter is required to be consistent, and only the same frequency generation polynomial parameter can be estimated and calculated through a difference between a front sequence and a back sequence, so that the reliability of subsequent signal transceiving is ensured.
In the specific implementation, the channel estimation parameters are extracted and inverted to obtain a second target signal, and the second target signal is multiplied by the PN sequence to achieve channel equalization, so that the stability of the signal in receiving and transmitting is improved, and meanwhile, the purpose of improving the signal receiving and transmitting quality is achieved.
Step S17, when the channel frequency response between the transmitting end and the receiving end is low, adopting a low-efficiency modulation mode to carry out modulation processing;
and S18, when the channel frequency response between the transmitting end and the receiving end is high, adopting a high-efficiency modulation mode to carry out modulation processing.
In specific implementation, the RSSI is a measure for evaluating the intensity of a wireless signal between the RC remote controller and the receiver) is adopted to dynamically adjust the modulation and demodulation mode, the current signal can be dynamically processed by adopting different efficient modulation modes according to different channel frequency responses, the signal receiving and transmitting processing quality is further improved, when the channel frequency response between the transmitting end and the receiving end is low, the modulation processing is carried out by adopting a low-efficiency modulation mode, otherwise, when the channel frequency response is high, the modulation processing is carried out by adopting a high-efficiency modulation mode, the stable signal processing of the signal when the signal is transmitted through a channel can be ensured in real time, and the situation that the signal is unstable or lost in frame easily occurs due to the fact that the signal is processed by adopting a conventional modulation mode when the channel quality is poor is avoided.
In summary, the first difference between the wireless communication processing method in the above embodiment and the embodiment is that, a convolutional encoding and interleaving processing manner is inserted into the transmitting end, so that the reliability of the signal in channel transmission is effectively improved, the influence of burst errors on the signal transmission is well resisted, then the modulation and demodulation pattern is dynamically adjusted according to the RSSI value, the current signal can be dynamically processed according to different channel frequency responses by adopting the modulation processing manner with the corresponding efficiency, and the signal processing quality of the present invention is effectively improved.
Example III
In another aspect, referring to fig. 3, a wireless communication processing apparatus according to a third embodiment of the present invention is applied to a wireless communication transmitting end and a receiving end, where the transmitting end includes:
the signal modulation module 11 is configured to perform inverse fast fourier transform modulation on the modulated signal and a preset pilot sequence, so as to obtain an inverse fast fourier transform modulated target signal;
a signal transmitting module 12, configured to transmit the target signal after the inverse fast fourier transform modulation to a receiving end through a channel;
the receiving end comprises:
a signal receiving module 13 for receiving the target signal after the inverse fast fourier transform modulation;
the channel modulation module 14 performs estimation and equalization processing on a channel according to a target signal and a preset pilot sequence, and analyzes the received target signal to obtain a signal sink corresponding to the signal source.
Further, in some optional embodiments of the present invention, the transmitting end and the receiving end further include:
a source processing module 15, configured to perform convolutional encoding and interleaving processing on the source when the source is sent out;
further, in some optional embodiments of the present invention, the method further includes:
a signal processing module 16 for inserting and removing a cyclic prefix into and from the transceiving signal;
a second signal processing module 17, configured to perform serial-parallel conversion, i.e., parallel-serial conversion processing.
In summary, in the wireless communication processing apparatus in the foregoing embodiment of the present invention, a transmitting end is awakened to generate random binary data as a source, a source processing module in the transmitting end performs convolutional encoding and interleaving on a current source, then performs inverse fast fourier transform modulation on the modulated signal and a preset pilot sequence to obtain an inverse fast fourier transform modulated target signal, inserts a cyclic prefix, and performs parallel-to-serial conversion on the inverse fast fourier transform modulated target signal, so as to obtain a target signal to be transmitted, and transmits the inverse fast fourier transform modulated target signal to a receiving end through a channel, and after receiving the inverse fast fourier transform modulated target signal and performing inverse serial-to-parallel conversion and removing the cyclic prefix according to the transmitting signal of the transmitting end, a channel modulation module is awakened, and a channel can be estimated and equalized according to the target signal and the preset pilot sequence, and analyzes the received target signal, so as to obtain a sink corresponding to the source.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. A wireless communication processing method, which is applied to a signal transmitting end, the method comprising:
the method comprises the steps that a sending end generates random binary data as a source, and signal modulation is carried out on the source to determine a modulation signal;
the transmitting end carries out inverse fast Fourier transform modulation on the modulation signal and a preset pilot frequency sequence to obtain a target signal after the inverse fast Fourier transform modulation, and the target signal after the inverse fast Fourier transform modulation is transmitted to the receiving end through a channel;
after the receiving end receives a target signal, estimating and balancing a channel according to the target signal and a preset pilot sequence, multiplying the target signal and the preset pilot sequence by adopting an LS algorithm to obtain a channel estimation parameter, inverting the channel estimation parameter to obtain a second target signal, multiplying the preset pilot sequence and the second target signal by adopting the LS algorithm to achieve channel balancing, and analyzing the received target signal to obtain a signal sink corresponding to the signal source;
wherein the preset pilot sequences multiplied twice by the LS algorithm are the same sequence.
2. The method of claim 1, wherein the step of signal modulating the source further comprises:
and performing convolutional coding and interleaving treatment on the information source when the information source is sent out.
3. The method of claim 1, wherein the step of modulating the signal from the source comprises:
and carrying out FFT demodulation processing on the received target signal.
4. The method according to claim 1, wherein the step of adaptively adjusting the modulation efficiency according to the wireless signal strength between the transmitting end and the receiving end comprises:
when the channel frequency response between the transmitting end and the receiving end is low, adopting a low-efficiency modulation mode to carry out modulation processing;
when the channel frequency response between the transmitting end and the receiving end is high, a high-efficiency modulation mode is adopted for modulation processing.
5. A wireless signal processing apparatus for implementing the wireless communication processing method of any one of claims 1 to 4, comprising a transmitting end and a receiving end, the transmitting end comprising:
the signal modulation module is used for carrying out inverse fast Fourier transform modulation on the modulation signal and a preset pilot frequency sequence to obtain a target signal after the inverse fast Fourier transform modulation;
the signal transmitting module is used for transmitting the target signal subjected to the inverse fast Fourier transform modulation to the receiving end through a channel;
the receiving end comprises:
the signal receiving module is used for receiving the target signal after the inverse fast Fourier transform modulation;
and the channel modulation module is used for carrying out estimation and equalization processing on a channel according to a target signal and a preset pilot frequency sequence, and analyzing the received target signal to obtain a signal sink corresponding to the signal source.
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